CN109575489A - A kind of preparation method of PMMA composite material - Google Patents
A kind of preparation method of PMMA composite material Download PDFInfo
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- CN109575489A CN109575489A CN201811507029.3A CN201811507029A CN109575489A CN 109575489 A CN109575489 A CN 109575489A CN 201811507029 A CN201811507029 A CN 201811507029A CN 109575489 A CN109575489 A CN 109575489A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Compositions Of Macromolecular Compounds (AREA)
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Abstract
The invention belongs to polymethyl methacrylate preparation technical fields, and in particular to a kind of PMMA composite material and preparation method.The PMMA composite material is made of each component comprising following weight percent: polymethyl methacrylate and polybutylene terephthalate (PBT) blend 50-83%;Sodium rice aluminium hydroxide or modified sodium rice aluminium hydroxide 5-33%;Antioxidant 0.5-3%;Toughener 1-25%.PMMA composite material provided by the invention has heat resistance, resistance to ag(e)ing, acid-proof alkaline excellent, and has preferable mechanical performance and excellent translucency, can be used for the precision optics component in the fields such as LED.
Description
Technical field
The invention belongs to polymethyl methacrylate preparation technical fields, and in particular to a kind of preparation of PMMA composite material
Method.
Background technique
Polymethyl methacrylate (PMMA), is commonly called as organic glass, is a kind of important organic transparent material, it, which has, is permitted
Mostly excellent performance, such as: high light transmittance (light transmittance 10% or more) higher than common inorganic glass, light, easy processing molding, ruler
Very little stability, weatherability, electrical insulating property are good, and not easy coloring etc., so being widely used in agricultural, aviation, building, optics
The fields such as instrument.The major defect of organic glass is poor heat resistance, and water absorption rate is high, glass transition temperature generally 85-110 DEG C it
Between, short-period used temperature is no more than 120 DEG C, this makes polymer not only be easy degradation during production and processing, and
And be easily deformed during use, seriously limit its application range.For these disadvantages, researcher is done
Many study on the modification.The modification of PMMA is exactly the aggregated structure of molecular chain structure to the polymer, strand
And (or) texture carries out certain adjustment and change, so that certain performances of material be made to be improved and improve.From
From the perspective of practical application, the modification of PMMA is concentrated mainly on heat resistance, wear-resistant, toughening, fire-retardant etc..At present
The bulk copolyrnerization method of report mainly has: copolymerization, crosslinking toughening;Blending toughening;It is introduced in macromolecular main chain, side chain cyclic annular
Structure etc..These method majorities are limited to the performance raising of organic glass, or seriously reduce its translucency, and can bring material simultaneously
Expect the problem of light decay is big, and antioxygenic property declines, limits its application in the precision optics such as LED.
Summary of the invention
In order to solve the above problem in the prior art, it is compound that present invention is designed to provide a kind of novel PMMA
Material, with excellent translucency to be suitable for the precision optics components such as LED neck while the mechanical property made it have
Domain.
In order to achieve the above-mentioned object of the invention, this application provides following technical solutions:
A kind of PMMA composite material, is made of each component comprising following weight percent:
Polymethyl methacrylate and polybutylene terephthalate (PBT) blend 50-83%;
Sodium rice aluminium hydroxide or modified sodium rice aluminium hydroxide 5-33%;
Antioxidant 0.5-3%;
Toughener 1-25%.
Preferably, the polymethyl methacrylate and polybutylene terephthalate (PBT) blend are by the poly- methyl of 70-92%
Methyl acrylate and 8-30% polybutylene terephthalate (PBT) composition.
Preferably, the composite material further includes fire retardant 0.5-6%.
It is further preferred that the fire retardant be aluminium hydroxide, magnesium hydroxide, borate, molybdate, melamine and its
One of one hydration zinc borate composite flame-retardant agent of derivative, brominated Polystyrene and deca-BDE-antimony oxide is several
Kind.
Preferably, the preparation method of the modified aluminum trihydroxide includes the following steps: nano-aluminum hydroxide high temperature
It is soaked in alkaline solution after calcination, then filters, it is dry;It is modified that surface finally is carried out to the solid after drying with coupling agent.
It is further preferred that the temperature of the high-temperature calcination is 220-280oC, calcination time are 2-5 hours;The alkalinity
Solution is sodium hydroxide solution, potassium hydroxide solution, sodium bicarbonate solution or sodium carbonate liquor.
The alkaline solution is preferably strong base solution, such as sodium hydroxide solution;The concentration of alkaline solution be not easy it is excessively high, preferably
For 3-20%;Soaking time in lye is preferably 10-24 hours;Temperature is no more than 30 when immersionoC, preferably 5-15oC。
It is further preferred that the coupling agent is silane coupling agent KH-560, silane coupling agent DL-602 and silane coupled
One or more of agent KH500.The coupling agent is preferably the mixing of KH-560 and DL-602, and the weight ratio of the two is preferably
1:3-6。
Preferably, the antioxidant is four [ 3-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid ] pentaerythritol esters, antioxygen
One of agent 300, antioxidant 264 and four [ methyl-β-(3,5- di-tert-butyl-hydroxy phenyl) propionic ester ] pentaerythritol esters
Or it is several.
Preferably, the toughener is ethylene-octene copolymer, ethylene-vinyl acetate copolymer and ethylene-acrylic acid
One or more of ester-ethylene oxidic ester terpolymer.
Preferably, the average molecular weight of the polymethyl methacrylate is 10-15 ten thousand, and refractive index is 1.0-1.3, is melted
Melting index is 3-8;
Preferably, the density of the polybutylene terephthalate (PBT) is 1.1-1.3g/cm3, Lorentz-Lorenz molar refraction 70-75.
The present invention also provides a kind of preparation methods of above-mentioned PMMA composite material comprising following steps:
By the polymethyl methacrylate of 50-83% and polybutylene terephthalate (PBT) blend, 0.5-3% antioxidant and 1-
25% toughener is uniformly mixed, and is sent into double screw extruder, and 5-33% sodium rice aluminium hydroxide or modified sodium rice aluminium hydroxide pass through
Side feed system is added portionwise, melting extrusion, granulation, obtains target PMMA composite material.
Preferably, the feeding revolving speed of the double screw extruder is 220-320rpm;Each section of screw rod of double screw extruder
Temperature of the temperature from feed opening to head is respectively an area temperature 100-140oC, two area temperature 160-200oC, three area temperature 220-
230oC, four area temperature 220-230oC, five area temperature 220-230oC, six area temperature 220-230oC, head temperature 230oC, screw rod
Revolving speed is 280-320rpm.
Preferably, sodium rice aluminium hydroxide or modified sodium rice aluminium hydroxide are being added by side feed system in the differentiation of screw rod five two batches
Enter.
In the present invention, polybutylene terephthalate (PBT) and polymethyl methacrylate are added in the form of blend,
It is modified simultaneously using sodium rice aluminium hydroxide or modified sodium rice aluminium hydroxide as inorganic modifier, last PMMA obtained is compound
Material not only increases the structural strength of composite material entirety, the performances such as ageing-resistant, also has preferable translucency.
Compared with prior art, PMMA composite material provided by the invention has heat resistance, ageing resistance, resistance to acid and alkali excellent
It is different, while there is preferable mechanical performance and excellent translucency, it can be used for the precision optics component in the fields such as LED.Overcome
The problem of ordinary PMMA material ageing resistance, resistance to acid and alkali, mechanical strength and translucency can not combine.
Specific embodiment
To keep purpose and the technical solution of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention, to this
The technical solution of invention is clearly and completely described.Wherein, sodium rice aluminium hydroxide used is averaged in the embodiment of the present invention
Partial size is 10-30um, BET specific surface area 4-5cm2/ g, purity are greater than 99%.
Embodiment 1
A kind of PMMA composite material, is made of each component comprising following weight percent:
Polymethyl methacrylate and polybutylene terephthalate (PBT) blend 55%;
Sodium rice aluminium hydroxide 20%;
Antioxidant 300 0.8%;
Ethylene-octene copolymer 24.2%;
The polymethyl methacrylate and polybutylene terephthalate (PBT) blend by 60% polymethyl methacrylate and
40% polybutylene terephthalate (PBT) composition;
The average molecular weight of the polymethyl methacrylate is 200,000, refractive index 1.0, melt index 3;
The density of the polybutylene terephthalate (PBT) is 1.5 g/cm3, Lorentz-Lorenz molar refraction 60;
The preparation method of above-mentioned PMMA composite material comprising following steps:
By 55% polymethyl methacrylate and polybutylene terephthalate (PBT) blend, 0.8% antioxidant 300 and 24.2%
Ethylene-octene copolymer is uniformly mixed, and is sent into 20% sodium rice aluminium hydroxide in double screw extruder and is added in batches by side feed system
Enter, melting extrusion, granulation, obtains target PMMA composite material;
The feeding revolving speed of the double screw extruder is 280rpm;Each section of extruder temperature of double screw extruder is from feed opening to machine
The temperature of head is respectively area's temperature 120oC, two area's temperature 180oC, three area's temperature 225oC, four area's temperature 225oC, five Qu Wendu
230oC, six area's temperature 230oC, head temperature 230oC, screw speed 300rpm;
Sodium rice aluminium hydroxide is distinguished two batches in screw rod five by side feed system and is added.
Embodiment 2
A kind of PMMA composite material, is made of each component comprising following weight percent:
Polymethyl methacrylate and polybutylene terephthalate (PBT) blend 80%;
Sodium rice aluminium hydroxide 13%;
Four 3-(3,5- di-tert-butyl-hydroxy phenyl) and propionic acid ] pentaerythritol ester 2%;
Ethylene-vinyl acetate copolymer 5%;
The polymethyl methacrylate and polybutylene terephthalate (PBT) blend by 80% polymethyl methacrylate and
20% polybutylene terephthalate (PBT) composition;
The average molecular weight of the polymethyl methacrylate is 120,000, refractive index 1.2, melt index 6;
The density of the polybutylene terephthalate (PBT) is 1.2 g/cm3, Lorentz-Lorenz molar refraction 75;
The preparation method of above-mentioned PMMA composite material comprising following steps:
By 80% polymethyl methacrylate and polybutylene terephthalate (PBT) blend, 2% 4 [ the tertiary fourth of 3-(3,5- bis-
Base -4- hydroxy phenyl) propionic acid ] pentaerythritol ester and 5% ethylene-vinyl acetate copolymer be uniformly mixed, it is sent into double screw extruder
In 13% sodium rice aluminium hydroxide be added portionwise by side feed system, melting extrusion, granulation obtain target PMMA composite material;
The feeding revolving speed of the double screw extruder is 280rpm;Each section of extruder temperature of double screw extruder is from feed opening to machine
The temperature of head is respectively area's temperature 120oC, two area's temperature 180oC, three area's temperature 225oC, four area's temperature 225oC, five Qu Wendu
230oC, six area's temperature 230oC, head temperature 230oC, screw speed 300rpm;
Sodium rice aluminium hydroxide is distinguished two batches in screw rod five by side feed system and is added.
Embodiment 3
A kind of PMMA composite material, is made of each component comprising following weight percent:
Polymethyl methacrylate and polybutylene terephthalate (PBT) blend 80%;
Modified sodium rice aluminium hydroxide 13%;
Four 3-(3,5- di-tert-butyl-hydroxy phenyl) and propionic acid ] pentaerythritol ester 2%;
Ethylene-vinyl acetate copolymer 5%;
The polymethyl methacrylate and polybutylene terephthalate (PBT) blend by 80% polymethyl methacrylate and
20% polybutylene terephthalate (PBT) composition;
The average molecular weight of the polymethyl methacrylate is 120,000, refractive index 1.2, melt index 6;
The density of the polybutylene terephthalate (PBT) is 1.2 g/cm3, Lorentz-Lorenz molar refraction 75;
The preparation method of the modified aluminum trihydroxide includes the following steps: nano-aluminum hydroxide 250oC is calcined 3 hours
It is soaked in the sodium hydroxide solution that concentration is 10% 12 hours, then filters afterwards, it is dry;After finally with coupling agent to drying
It is modified that solid carries out surface;The coupling agent is KH560 and DL602 with the mixture of weight ratio 1:3.
The preparation method of above-mentioned PMMA composite material comprising following steps:
By 80% polymethyl methacrylate and polybutylene terephthalate (PBT) blend, 2% 4 [ the tertiary fourth of 3-(3,5- bis-
Base -4- hydroxy phenyl) propionic acid ] pentaerythritol ester and 5% ethylene-vinyl acetate copolymer be uniformly mixed, it is sent into double screw extruder
In 13% modified sodium rice aluminium hydroxide be added portionwise by side feed system, melting extrusion, granulation obtain target PMMA composite material;
The feeding revolving speed of the double screw extruder is 280rpm;Each section of extruder temperature of double screw extruder is from feed opening to machine
The temperature of head is respectively area's temperature 120oC, two area's temperature 180oC, three area's temperature 225oC, four area's temperature 225oC, five Qu Wendu
230oC, six area's temperature 230oC, head temperature 230oC, screw speed 300rpm;
Modified sodium rice aluminium hydroxide is distinguished two batches in screw rod five by side feed system and is added.
Embodiment 4
A kind of PMMA composite material, is made of each component comprising following weight percent:
Polymethyl methacrylate and polybutylene terephthalate (PBT) blend 77%;
Sodium rice aluminium hydroxide 13%;
Four 3-(3,5- di-tert-butyl-hydroxy phenyl) and propionic acid ] pentaerythritol ester 2%;
Ethylene-vinyl acetate copolymer 5%;
Brominated Polystyrene 3%;
The polymethyl methacrylate and polybutylene terephthalate (PBT) blend by 80% polymethyl methacrylate and
20% polybutylene terephthalate (PBT) composition;
The average molecular weight of the polymethyl methacrylate is 120,000, refractive index 1.2, melt index 6;
The density of the polybutylene terephthalate (PBT) is 1.2 g/cm3, Lorentz-Lorenz molar refraction 75;
The preparation method of above-mentioned PMMA composite material comprising following steps:
By 77% polymethyl methacrylate and polybutylene terephthalate (PBT) blend, 2% 4 [ the tertiary fourth of 3-(3,5- bis-
Base -4- hydroxy phenyl) propionic acid ] pentaerythritol ester and 5% ethylene-vinyl acetate copolymer be uniformly mixed, it is sent into double screw extruder
In 13% sodium rice aluminium hydroxide be added portionwise by side feed system, melting extrusion, granulation obtain target PMMA composite material;
The feeding revolving speed of the double screw extruder is 280rpm;Each section of extruder temperature of double screw extruder is from feed opening to machine
The temperature of head is respectively area's temperature 120oC, two area's temperature 180oC, three area's temperature 225oC, four area's temperature 225oC, five Qu Wendu
230oC, six area's temperature 230oC, head temperature 230oC, screw speed 300rpm;
Sodium rice aluminium hydroxide is distinguished two batches in screw rod five by side feed system and is added.
Comparative example 1
A kind of PMMA composite material, is made of each component comprising following weight percent:
Polymethyl methacrylate 80%;
Sodium rice aluminium hydroxide 13%;
Four 3-(3,5- di-tert-butyl-hydroxy phenyl) and propionic acid ] pentaerythritol ester 2%;
Ethylene-vinyl acetate copolymer 5%;
The average molecular weight of the polymethyl methacrylate is 120,000, refractive index 1.2, melt index 6;
The preparation method of above-mentioned PMMA composite material comprising following steps:
By 80% polymethyl methacrylate, 2% 4 [ 3-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid ] pentaerythritol ester
It is uniformly mixed with 5% ethylene-vinyl acetate copolymer, is sent into 13% sodium rice aluminium hydroxide in double screw extruder and passes through side feed system
It is added portionwise, melting extrusion, granulation, obtains target PMMA composite material;
The feeding revolving speed of the double screw extruder is 280rpm;Each section of extruder temperature of double screw extruder is from feed opening to machine
The temperature of head is respectively area's temperature 120oC, two area's temperature 180oC, three area's temperature 225oC, four area's temperature 225oC, five Qu Wendu
230oC, six area's temperature 230oC, head temperature 230oC, screw speed 300rpm;
Sodium rice aluminium hydroxide is distinguished two batches in screw rod five by side feed system and is added.
Comparative example 2
A kind of PMMA composite material, is made of each component comprising following weight percent:
Polymethyl methacrylate and polybutylene terephthalate (PBT) blend 80%;
Hollow glass micropearl 13%;
Four 3-(3,5- di-tert-butyl-hydroxy phenyl) and propionic acid ] pentaerythritol ester 2%;
Ethylene-vinyl acetate copolymer 5%;
The polymethyl methacrylate and polybutylene terephthalate (PBT) blend by 80% polymethyl methacrylate and
20% polybutylene terephthalate (PBT) composition;
The average molecular weight of the polymethyl methacrylate is 120,000, refractive index 1.2, melt index 6;
The density of the polybutylene terephthalate (PBT) is 1.2 g/cm3, Lorentz-Lorenz molar refraction 75;
The hollow glass micropearl is borosilicate glass, bulk density 100g/L, partial size 100um, wall thickness 2um.
The preparation method of above-mentioned PMMA composite material comprising following steps:
The pretreatment of hollow glass micropearl: hollow glass micropearl is modified its surface using Silane coupling reagent KH-570,
Modified hollow glass micropearl is placed into 100-105oDry 3h in the baking oven of C.
By 80% polymethyl methacrylate and polybutylene terephthalate (PBT) blend, 2% 4 [ bis- uncle of 3-(3,5-
Butyl -4- hydroxy phenyl) propionic acid ] pentaerythritol ester and 5% ethylene-vinyl acetate copolymer be uniformly mixed, it is sent into twin-screw extrusion
15% sodium rice aluminium hydroxide is added portionwise by side feed system in machine, melting extrusion, granulation, obtains target PMMA composite material;
The feeding revolving speed of the double screw extruder is 280rpm;Each section of extruder temperature of double screw extruder is from feed opening to machine
The temperature of head is respectively area's temperature 120oC, two area's temperature 180oC, three area's temperature 225oC, four area's temperature 225oC, five Qu Wendu
230oC, six area's temperature 230oC, head temperature 230oC, screw speed 300rpm;
Sodium rice aluminium hydroxide is distinguished two batches in screw rod five by side feed system and is added.
Performance detection
1, mechanical performance, heat resistance and translucency
Mechanical property, heat resistance and the translucency of above-described embodiment 1-4 and comparative example 1,2 the PMMA composite material provided are carried out
Detection, wherein tensile strength is tested according to GB/T1040.1-2006, and light transmittance is carried out according to national standard GB/T2410-2008
Test, yellow chromaticity are tested according to national standard GB/2409-80, and unnotched impact strength is surveyed according to GB/T1043.1-2008
Examination;Rockwell hardness is according to ISO2039-2;Load deformation temperature is tested according to GB/T1634.1-2004, and test result is as follows
Table 1.
The performance test results statistical form of PMMA composite material made from 1 embodiment 1-4 of table and comparative example
2, ageing resistance
In addition, by PMMA composite material made from above-described embodiment 1-4 and comparative example 1-2, routinely plate is made in technique, takes phase
60, the template (0.3m × 0.6m) of same specification, every group 10, the exposure of the ageing-resistant test method referring to specified in national standard 1000
Hour, statistical result is as shown in table 2 below.Wherein, sample outer surface is cracked, abrade, chip or deformation regard as sample
Surface changes.
When test, light source is xenon lamp, and light radiation intensity is 1400W/m2, during test, sample is around light source with 3r/min
Speed rotation;
Sample is successively sprayed water 5min, dry 25min, iterative cycles to off-test.The distilled water of sprinkling is 25oElectricity when C
Conductance is less than 1mS/m.
The anti-aging property of PMMA composite material made from each embodiment of table 2 and comparative example
Meanwhile we have also investigated the acid-alkali-corrosive-resisting using template made from same method, test condition is: will be made
Template (0.3m × 0.6m) be dipped in 10% HCL solution and 10% sodium hydroxide solution respectively, at room temperature impregnate 48 hours,
The situation of change of specimen surface is observed and recorded, statistical result is as shown in table 3 below.Wherein, there is significant change i.e. in specimen surface
It is considered as template to be corroded.
The acid-proof alkaline of PMMA composite material made from each embodiment of table 3 and comparative example
The above is only embodiments of the present invention, and the description thereof is more specific and detailed, and but it cannot be understood as to this hair
The limitation of bright the scope of the patents.It should be pointed out that for those of ordinary skill in the art, not departing from present inventive concept
Under the premise of, various modifications and improvements can be made, these are all belonged to the scope of protection of the present invention.
Claims (10)
1. a kind of PMMA composite material, is made of each component comprising following weight percent:
Polymethyl methacrylate and polybutylene terephthalate (PBT) blend 50-83%;
Sodium rice aluminium hydroxide or modified sodium rice aluminium hydroxide 5-33%;
Antioxidant 0.5-3%;
Toughener 1-25%.
2. composite material according to claim 1, the polymethyl methacrylate and polybutylene terephthalate (PBT)
Blend is made of 70-92% polymethyl methacrylate and 8-30% polybutylene terephthalate (PBT).
3. composite material according to claim 1, the composite material further includes fire retardant 0.5-6%.
4. composite material according to claim 3, the fire retardant is aluminium hydroxide, magnesium hydroxide, borate, molybdic acid
One hydration zinc borate composite flame-proof of salt, melamine and its derivative, brominated Polystyrene and deca-BDE-antimony oxide
One or more of agent.
5. the preparation method of composite material according to claim 1, the modified aluminum trihydroxide includes the following steps:
It will be soaked in alkaline solution after nano-aluminum hydroxide high-temperature calcination, then filter, it is dry;After finally with coupling agent to drying
It is modified that solid carries out surface.
6. composite material according to claim 1, the antioxidant be four 3-(3,5- di-tert-butyl-hydroxy phenyl)
Propionic acid ] pentaerythritol ester, antioxidant 300, antioxidant 264 and four [ methyl-β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid
One or more of ester ] pentaerythritol ester.
7. composite material according to claim 1, the toughener is ethylene-octene copolymer, ethene-vinyl acetate is total
One or more of polymers and ethylene-acrylate-ethylene oxidic ester terpolymer.
8. composite material according to claim 1, the average molecular weight of the polymethyl methacrylate is 10-15 ten thousand,
Refractive index is 1.0-1.3, melt index 3-8.
9. composite material according to claim 1, the density of the polybutylene terephthalate (PBT) is 1.1-1.3g/
cm3, Lorentz-Lorenz molar refraction 70-75.
10. a kind of preparation method of the PMMA composite material as described in any one of claim 1-9 comprising following steps:
By the polymethyl methacrylate of 50-83% and polybutylene terephthalate (PBT) blend, 0.5-3% antioxidant and 1-
25% toughener is uniformly mixed, and is sent into double screw extruder, and 5-33% sodium rice aluminium hydroxide or modified sodium rice aluminium hydroxide pass through
Side feed system is added portionwise, melting extrusion, granulation.
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