CN117736585A - Preparation method of bio-based high-transparency thermoplastic elastomer composition - Google Patents
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- CN117736585A CN117736585A CN202311468421.2A CN202311468421A CN117736585A CN 117736585 A CN117736585 A CN 117736585A CN 202311468421 A CN202311468421 A CN 202311468421A CN 117736585 A CN117736585 A CN 117736585A
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- 229920002725 thermoplastic elastomer Polymers 0.000 title claims abstract description 65
- 239000000203 mixture Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title claims abstract description 36
- 238000001125 extrusion Methods 0.000 claims abstract description 42
- 239000003208 petroleum Substances 0.000 claims abstract description 34
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 29
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 29
- 238000005469 granulation Methods 0.000 claims abstract description 15
- 230000003179 granulation Effects 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 12
- 239000000806 elastomer Substances 0.000 claims description 11
- 229920006352 transparent thermoplastic Polymers 0.000 claims description 8
- 229920000800 acrylic rubber Polymers 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229920000058 polyacrylate Polymers 0.000 claims description 6
- 239000000126 substance Substances 0.000 abstract description 16
- 238000005538 encapsulation Methods 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 9
- 229920000515 polycarbonate Polymers 0.000 abstract description 7
- 239000004417 polycarbonate Substances 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 239000002861 polymer material Substances 0.000 abstract description 3
- 239000013535 sea water Substances 0.000 abstract description 3
- 230000009182 swimming Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 230000009286 beneficial effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- CCDWGDHTPAJHOA-UHFFFAOYSA-N benzylsilicon Chemical compound [Si]CC1=CC=CC=C1 CCDWGDHTPAJHOA-UHFFFAOYSA-N 0.000 description 2
- 229920006167 biodegradable resin Polymers 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 2
- -1 polybutylene terephthalate Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 1
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
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Abstract
The invention discloses a preparation method of a bio-based high-transparency thermoplastic elastomer composition, which comprises the following components: 20-55% of SEBS, 25-45% of white oil, 10-25% of petroleum resin, 0.2% of slipping agent and 0.2% of antioxidant; the preparation method comprises the following steps: s1, sequentially adding the materials into a high-speed mixer for fully mixing to form a composition; s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles. The thermoplastic elastomer composition prepared by the invention is prepared from partial bio-based raw materials, is favorable for reducing carbon emission and realizing sustainable development of high polymer materials, has higher transparency, has stronger encapsulation force with polycarbonate, has excellent chemical resistance and heat resistance, can be applied to various application scenes such as swimming pools or seawater, has excellent mechanical properties, simple preparation process and high processing efficiency, and is favorable for large-scale commercial production.
Description
Technical Field
The invention belongs to the technical field of thermoplastic elastomer preparation, and particularly relates to a preparation method of a bio-based high-transparency thermoplastic elastomer composition.
Background
The thermoplastic elastomer TPE (Thermoplast icelastomer) is a high-molecular material which has high elasticity, high strength and high rebound of rubber at normal temperature and can be plasticized and processed at high temperature. TPE has the advantages of environmental protection, no toxicity, wide hardness range, good rebound resilience, soft touch, no need of vulcanization, convenient and simple processing and capability of being recycled by secondary processing, and is widely applied to the fields of wires and cables, medical equipment, auto parts, electronic appliances, tool encapsulation, food packaging, articles for daily use, sealing products, sports equipment and the like, and has wide market application prospect and rapid development.
The high transparent TPE has higher transparency and soft hand feeling, and can be applied to the fields of children toys, adult products, transparent material encapsulation and the like, but the existing transparent TPE is generally formed by modifying and processing petroleum-based resin, has higher carbon emission and does not have the characteristic of being capable of coating transparent polar materials such as Polycarbonate (PC). Patent document publication No. CN114276643a discloses a high-transparency, high-resilience and smooth thermoplastic elastomer material, which uses phenyl methyl silicone oil with specific refractive index as a slipping agent to prepare a high-transparency and smooth TPE, but the raw materials used are not petroleum-based raw materials and do not have the performance of a double injection molding encapsulation PC; patent document with publication number CN114276643a discloses a high transparent, high rebound, smooth thermoplastic elastomer material, which uses phenyl methyl silicone oil with specific refractive index as a slipping agent to prepare high transparent, smooth TPE, but the raw materials used are petroleum-based raw materials and do not have the performance of double injection molding encapsulation PC; patent document CN111423691a discloses a low-hardness transparent elastomer material and a method for producing the same, which has a wide adjustable range of hardness and excellent transparency, has a certain polarity, can be double-color injection-molded with polybutylene terephthalate (PBT), and can be molded in a thermoplastic manner like a plastic molding process. However, the raw materials used by the elastomer are petroleum-based raw materials, which is not beneficial to reducing carbon dioxide emission; patent document publication No. CN114350101A discloses a thermoplastic elastomer material containing at least one of biodegradable resin polylactic acid (PLA) or polybutylene adipate/terephthalate (PBAT) and having a good coating force with PLA and PBAT, but the elastomer mixture contains a large amount of filler as a non-transparent material, a process for producing the same, and a coated biodegradable resin article.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme: a process for preparing a bio-based highly transparent thermoplastic elastomer composition, said thermoplastic elastomer comprising the following components: 20-55% of SEBS, 25-45% of white oil, 10-25% of petroleum resin, 0.2% of slipping agent and 0.2% of antioxidant;
the preparation method comprises the following steps:
s1, sequentially adding the materials into a high-speed mixer for fully mixing to form a composition;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In a preferred embodiment of the present invention, in step S1, SEBS and white oil are mixed in advance, and then left to stand for 4 hours.
In a preferred embodiment of the invention, after SEBS and white oil are mixed in advance and kept stand, the mixture is stirred and added with an antioxidant and a slipping agent, and finally petroleum resin is added for blending.
In a preferred embodiment of the present invention, the thermoplastic elastomer further comprises the following components:
PP 5% -14%, PE 10% and acrylic elastomer 20% -24%.
In a preferred embodiment of the present invention, the length-diameter ratio of the twin-screw extruder is 40-60, and the barrel is 8-15 sections.
In a preferred embodiment of the present invention, the barrel temperature of the twin screw extruder is 120-220 ℃ during extrusion in a molten state.
In a preferred embodiment of the present invention, the twin screw extruder is operated at a speed of 180-450rpm during extrusion.
The invention solves the defects existing in the background technology, and has the following beneficial effects:
(1) The thermoplastic elastomer composition prepared by the invention is prepared from partial bio-based raw materials, which is beneficial to reducing carbon emission and realizing sustainable development of high polymer materials;
(2) The thermoplastic elastomer composition prepared by the invention has higher transparency and stronger encapsulation force with polycarbonate;
(3) The thermoplastic elastomer composition prepared by the invention has excellent chemical resistance and heat resistance, and can be applied to various application scenes such as swimming pools or seawater;
(4) The thermoplastic elastomer composition prepared by the invention has excellent mechanical properties, simple preparation process and high processing efficiency, and is beneficial to large-scale commercial production.
Detailed Description
The present invention will be further described with reference to specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the present invention and practice it.
Example 1
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 35% of SEBS, 40% of white oil, 14.6% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 10% of PP;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Example 2
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 44.6% of SEBS, 25% of white oil, 25% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 5% of PP;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Example 3
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 39.6% of SEBS, 30% of white oil, 25% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 5% of PP;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Example 4
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 30% of SEBS, 40% of white oil, 15.6% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 14% of PP;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Example 5
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 55% of SEBS, 30% of white oil, 14.6% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 10% of PP;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Example 6
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 31% of SEBS, 34.6% of white oil, 10% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 24% of acrylic elastomer;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Example 7
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 30% of SEBS, 34.6% of white oil, 15% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 20% of acrylic elastomer;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Example 8
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 20% of SEBS, 45% of white oil, 20.6% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 14% of PP;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Comparative example 1
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 35% of SEBS, 40% of white oil, 14.6% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 10% of PE;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Comparative example 2
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 39.6% of SEBS, 40% of white oil, 10% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 10% of PP;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Comparative example 3
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 55% of SEBS, 30% of white oil, 14.6% of petroleum resin, 0.2% of slipping agent and 0.2% of antioxidant;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Comparative example 4
The embodiment provides a preparation method of a bio-based high-transparency thermoplastic elastomer composition, wherein the thermoplastic elastomer comprises the following components: 31% of SEBS, 34.6% of white oil, 10% of petroleum resin, 0.2% of slipping agent, 0.2% of antioxidant and 24% of acrylic elastomer;
the preparation method comprises the following steps:
s1, sequentially adding the substances into a high-speed mixer to be fully mixed to form a composition, firstly mixing SEBS and white oil in advance, standing for 4 hours after mixing, stirring, adding an antioxidant and a slipping agent, and finally adding petroleum resin to blend;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
In this example, the length-to-diameter ratio of the twin-screw extruder was 44, the barrel was 11 stages, the barrel temperature at the time of extrusion in the molten state of the twin-screw extruder was 175℃and the rotational speed of the twin-screw extruder at the time of extrusion was 300rpm.
Examples 1-8 and comparative examples 1-4 were tested by the following procedure:
1. hardness of
The testing method comprises the following steps: ASTM D2240, test time 10S;
2. tensile strength, elongation at break, tensile modulus
The testing method comprises the following steps: ASTM D412 Die C, test speed 500mm/min;
3、MI
the testing method comprises the following steps: ASTM D1238, test conditions 190 ℃,2.16kg.
4. Transmittance, haze
The testing method comprises the following steps: ASTM D1003, specimen thickness 3.2mm;
5. force of encapsulation
The testing method comprises the following steps: ASTM D6862, test speed: 50mm/min, substrate: polycarbonate (PC), encapsulation temperature: 210 ℃;
6. chemical resistance
The testing method comprises the following steps: BS EN ISO 105-E03:2010, chlorine water resistance test: chlorine water concentration 100ppm, soaking time 48 hours, salt water resistance test: the concentration of the brine is 3.5%, and the soaking time is 48 hours;
7. temperature resistance test
Test conditions: the temperature is 60 ℃, the humidity is 90 percent, and the time is 48 hours.
The results of the test are shown in the following table
Comparative examples and examples comparative illustrations:
1. comparative example 1 corresponding to example 1, the biobased PP was replaced with biobased PE, with a resultant decrease in transparency;
2. comparative example 2 corresponds to example 3, 15 parts of petroleum resin is reduced, and the adhesive force is severely reduced;
3. comparative example 3 corresponds to example 5: comparative example 3 uses a low molecular weight SEBS, whereas example 5 uses a high molecular weight SEBS, the transparency decreases;
4. comparative example 4 corresponds to example 6, comparative example 4 uses a high hardness acrylic elastomer, example 6 uses a low hardness LA2250, the heat resistance is poor, comparative example 4 is zinc stearate, example 6 is erucamide, and the sample whitens after being immersed in chlorine water for 48 hours.
In summary, the thermoplastic elastomer composition prepared by the invention is prepared from partial bio-based raw materials, is favorable for reducing carbon emission and realizing sustainable development of high polymer materials, has higher transparency and stronger encapsulation force with polycarbonate, has excellent chemical resistance and heat resistance, can be applied to various application scenes such as swimming pools or seawater, and has excellent mechanical properties, simple preparation process and high processing efficiency, and is favorable for large-scale commercial production.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (7)
1. A process for preparing a bio-based highly transparent thermoplastic elastomer composition, characterized in that the thermoplastic elastomer comprises the following components: 20-55% of SEBS, 25-45% of white oil, 10-25% of petroleum resin, 0.2% of slipping agent and 0.2% of antioxidant;
the preparation method comprises the following steps:
s1, sequentially adding the materials into a high-speed mixer for fully mixing to form a composition;
s2, transferring the composition to a double-screw extruder, and performing melt extrusion granulation to obtain thermoplastic elastomer modified particles.
2. The method for producing a bio-based highly transparent thermoplastic elastomer composition according to claim 1, wherein in step S1, SEBS and white oil are mixed in advance and allowed to stand for 4 hours after mixing.
3. The method for preparing a bio-based highly transparent thermoplastic elastomer composition according to claim 2, wherein after SEBS and white oil are mixed in advance and left to stand, an antioxidant and a slipping agent are added by stirring, and finally petroleum resin is added for blending.
4. The method of preparing a bio-based highly transparent thermoplastic elastomer composition according to claim 1, wherein the thermoplastic elastomer further comprises the following components:
PP 5% -14%, PE 10% and acrylic elastomer 20% -24%.
5. The method for preparing a bio-based highly transparent thermoplastic elastomer composition according to claim 1, wherein the twin-screw extruder has an aspect ratio of 40 to 60 and the barrel has 8 to 15 stages.
6. The method for producing a bio-based highly transparent thermoplastic elastomer composition according to claim 1, wherein the barrel temperature of the twin-screw extruder is 120 to 220 ℃ when the twin-screw extruder is extruded in a molten state.
7. The method for producing a bio-based highly transparent thermoplastic elastomer composition according to claim 1, wherein the twin-screw extruder has a rotation speed of 180 to 450rpm at the time of extrusion.
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