CN102990794A - Synthesis method of polyvinyl chloride (PVC)/chlorinated polyvinyl chloride (CPVC) alloy - Google Patents
Synthesis method of polyvinyl chloride (PVC)/chlorinated polyvinyl chloride (CPVC) alloy Download PDFInfo
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- CN102990794A CN102990794A CN2012102999622A CN201210299962A CN102990794A CN 102990794 A CN102990794 A CN 102990794A CN 2012102999622 A CN2012102999622 A CN 2012102999622A CN 201210299962 A CN201210299962 A CN 201210299962A CN 102990794 A CN102990794 A CN 102990794A
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Abstract
The invention provides a synthesis method of a polyvinyl chloride (PVC)/chlorinated polyvinyl chloride (CPVC) alloy. Through the invention, the influence of the PVC/CPVC blending ratio, filler variety, dosage and the like on the mechanical property of the PVC/CPVC alloy system is studied by selecting CPVC and PVC as main materials.
Description
Technical field
The present invention is specifically related to a kind of synthetic method of studies on polyvinyl chloride/chlorinated polyvinyl chloride alloy.
Background technology
Chliorinated polyvinyl chloride (CPVC) resin carries out suitability for industrialized production by German I G Farben in middle 1930s the earliest, the early stage production method that adopts is to place solution to carry out chlorination PVC, and the CPVC resin that adopts the method to produce more easily is dissolved in solvent than polyvinyl chloride resin.The sixties in 20th century, begin to adopt aqueous suspension chlorination method.CPVC is the important modification agent of PVC, and chlorinity is generally 61%～68% apparently higher than polyvinyl chloride resin in its molecular structure.Because contain more chlorine atom in its molecular structure, the vitrification point of CPVC resin (T) and heat distortion temperature are all higher, thereby heat resistance and maximum operation (service) temperature are apparently higher than PVC; Simultaneously the CPVC resin also has excellent mechanical property, chemical resistance, non-conductive, fire resistance and minimum smoke creating characteristic etc., is the new material of function admirable.The heat resistance of CPVC is utilized this characteristics than 20～40 ℃ of PVC mean heights, with the heat resistance that can improve PVC after the PVC blend.
In addition, the PVC/CPVC blend has preferably compatibility.It is more that external report is used in the research of PVC/CPVC blend, and the PVC/CPVC alloy of Goodrich company exploitation can adopt injection, extrude, roll and method manufacturing molding sheet, pallet, fan guard, electric parts and shell, business machine shell, tubing, communication equipment and the auto parts etc. such as compacting.Japan ponding chemical industrial company adds 5～30 parts of PVC and a small amount of PMMA or methyl methacrylate and cinnamic polymer or SAN copolymer in CPVC, obtain preferably material of mechanical strength, heat resistance, weatherability, resistance to chemical reagents, flame resistance and the transparency. for the manufacture of building materials, auto parts and components etc.
Summary of the invention
The invention provides a kind of synthetic method of studies on polyvinyl chloride/chlorinated polyvinyl chloride alloy, the present invention is material of main part by selective chlorination polyvinyl chloride (CPVC), polyvinyl chloride (PVC), has studied the impact on PVC/CPVC alloy system mechanical property such as PVC/CPVC blending ratio, packing variety and consumption.
1. the synthetic method of a studies on polyvinyl chloride/chlorinated polyvinyl chloride alloy is characterized in that the preparation technology of sample is:, mix with high-speed mixer by the accurate weighing raw materials of prescription requirement, processing aid and filler.The temperature of control open type plastic purificating set blanket roller is 180 ℃, and the temperature of rear roller is 170 ℃, and roller gap is 1～2 mm, the powder that mixes is joined in the plastics processing mill of preheating.Behind PVC/CPVC plasticizing bag roller, roller gap is adjusted into plays the triangle bag about 0.3 mm 3 times again, the thin slice that goes out 0.5～1.0 mm after the blend evenly is stand-by.The temperature of controlling 25 t vulcanizing presses is 180 ℃, behind the mould and die preheating, PVC/CPVC blend sheet stock is put into wherein, then is put in the vulcanizing press.Heat 10 min at 5～6 MPa, take out rapidly after 12～13 MPa heat 10 min, move in another vulcanizing press that does not heat, pressurize is cooled to room temperature.After the sample of compacting is placed 24 h, by national standard sample preparation and test.
2. the described tensile property test of step 1 is undertaken by GB/T 1040-92, the bending property test is undertaken by GB/T 9341-88, the test of cantilever beam impact property is undertaken by GB/T 9432-88, and heat distortion temperature (HDT) test is undertaken by GB/T 1634-89.
Beneficial effect of the present invention is: it is material of main part that the present invention selects CPVC, PVC, has studied the impact on the mechanical property of PVC/CPVC alloy system such as PVC/CPVC blending ratio, packing variety and consumption.
Step 2 is described to be worked as
m(PVC):
mWhen (CPVC) changing from 100:0 to 70:30, along with increasing of CPVC consumption, the yield strength of PVC/CPVC Binary Alloy System, hot strength, bending strength, heat distortion temperature etc. all are and increase progressively trend, and decline trend appears in impact strength, elongation at break, especially along with the increasing of CPVC content, the elongation at break range of decrease of PVC/CPVC Binary Alloy System is larger.
Step 1 is described when amount of filler is 5 parts, and the hot strength of PVC/CPVC alloy system is to select diatomite and active CaCO
3The time larger, impact strength then is to select active CaCO
3Larger during with potter's clay.Because the consumption of filler is little, filler is little on bending strength and the heat distortion temperature impact of PVC/CPVC alloy system.
Step 4 is described along with CaCO
3The increase of consumption, the hot strength of PVC/CPVC alloy, bending strength elongation at break all are the rear downward trend that rises first generally.Active CaCO
3The variation impact intensity of consumption is almost without impact.Heat distortion temperature is at active CaCO
3, when being 4～12 parts, consumption changes not quite, but as active CaCO
3When consumption surpassed 8 parts, heat distortion temperature rose.
The specific embodiment
The following examples elaborate to the present invention, but to not restriction of the present invention.
Embodiment 1
Blending ratio was on the impact of PVC/CPVC bianry alloy performance when the present embodiment explanation contained organic tin stabilizer, and when using organic tin stabilizer, prescription and the mechanical property experimental results of PVC/CPVC alloy see Table 1.The result shows, under the effect of organic tin stabilizer, when
m(PVC):
mWhen (CPVC) changing from 100:0 to 70:30, along with increasing of CPVC content, the hot strength of PVC/CPVC Binary Alloy System, impact strength, elongation at break all present the trend that descends first and rise afterwards; And bending strength in contrast, downward trend after occurring rising first.Two kinds of trend exist
m(PVC):
m(CPVC)=flex point appears during 80:20, this moment system impact strength and elongation at break 24% and 50% when all dropping to alone PVC respectively, it is original 97% that hot strength also only has, and bending strength has improved 5%.In addition, along with the increase of CPVC content in the blending ratio, the heat distortion temperature of system constantly raises,
m(PVC):
m(CPVC)=during 70:30, under differently curved direct stress (1.82 MPa and 0.45 MPa), heat distortion temperature increases respectively 3.1 ℃ and 6.6 ℃ than PVC.
The impact of the mechanical property of different mixture comparison PVC/CPVC alloy when table 1 contains organic tin stabilizer
Embodiment 2
The present embodiment illustrates different fillers to the impact of PVC/CPVC bianry alloy performance,
m(PVC):
m(CPVC)=add respectively talcum powder, potter's clay, sericite, diatomite and active CaCO in the system of 70:30
3Each 5 parts, different fillers see Table 2 to the impact of PVC/CPVC bianry alloy performance.
As can be seen from Table 2: the hot strength of PVC/CPVC alloy system is to select diatomite and active CaCO
3The time larger, be respectively 48.4 MPa and 47.8 MPa, impact strength then is to select active CaCO
3Larger during with potter's clay, be respectively 14.6 kJ/m
2With 11.3 kJ/m
2Adopting active CaCO
3The time, the elongation at break of sample also reaches and is 48.4% to the maximum.Because the use amount of filler is little, packing variety is little on bending strength and the heat distortion temperature impact of PVC/CPVC alloy system.The analysis-by-synthesis experimental result can be found out: in the PVC/CPVC alloy system, filler is selected CaCO alive
3The time best.
Table 2 packing variety is on the impact of PVC/CPVC bianry alloy performance
| Packing variety | Talcum powder | Potter's clay | Sericite | Diatomite | CaCO 3 |
| Hot strength/MPa | 40.7 | 41.8 | 43.2 | 48.4 | 47.8 |
| Impact strength/(kJ/m 2) | 7.2 | 11.3 | 7.4 | 6.7 | 14.6 |
| Bending strength/MPa | 62.4 | 63.5 | 65.7 | 66.1 | 67.4 |
| Elongation at break/% | 38.7 | 41.3 | 31.5 | 32.6 | 48.4 |
| Heat distortion temperature (1.82 MPa)/℃ | 85.4 | 83.6 | 84.1 | 82.6 | 84.1 |
| Heat distortion temperature (0.45 MPa)/℃ | 86.4 | 85.1 | 87.4 | 87.5 | 88.3 |
Embodiment 3
The present embodiment explanation amount of filler in the alloy system of PVC/CPVC, is added respectively 5～20 parts of active CaCO on the impact of PVC/CPVC alloy property
3, examine or check its consumption to the impact of PVC/CPVC alloy property, the results are shown in Table 3.Along with CaCO
3All be the rear downward trend that rises first in the increase of consumption, the hot strength of PVC/CPVC alloy, bending strength, elongation at break totally.The three is adding 4 parts of active CaCO
3After, reach maximum, then along with active CaCO
3The continuation of consumption increases, and begins to descend.As active CaCO
3When consumption reaches 16 parts, 87% the when three is respectively maximum, 84% and 81%.The impact strength of system is along with active CaCO
3Up and down fluctuation has appearred in the increase of consumption, but substantially maintains 13 kJ/m
2About.Heat distortion temperature is at active CaCO
3When being 4～12 parts, consumption changes not quite, but as active CaCO
3When consumption surpassed 8 parts, heat distortion temperature rose.
Table 3 CaCO
3Consumption is on the impact of PVC/CPVC alloy property
| Packing variety | 0 | 4 | 8 | 12 | 16 |
| Hot strength/MPa | 43.7 | 46.8 | 44.2 | 42.4 | 40.8 |
| Impact strength/(kJ/m 2) | 13.4 | 13.6 | 12.9 | 12.4 | 13.3 |
| Bending strength/MPa | 60.4 | 65.5 | 60.7 | 58.2 | 54.7 |
| Elongation at break/% | 38.1 | 47.7 | 44.5 | 42.6 | 38.4 |
| Heat distortion temperature (1.82 MPa)/℃ | 83.4 | 83.8 | 83.5 | 84.6 | 86.1 |
| Heat distortion temperature (0.45 MPa)/℃ | 87.4 | 88.2 | 87.2 | 87.7 | 88.7 |
Claims (2)
1. the synthetic method of a studies on polyvinyl chloride/chlorinated polyvinyl chloride alloy is characterized in that: by the accurate weighing raw materials of prescription requirement, processing aid and filler, mix with high-speed mixer; The temperature of control open type plastic purificating set blanket roller is 180 ℃, and the temperature of rear roller is 170 ℃, and roller gap is 1～2 mm, the powder that mixes is joined in the plastics processing mill of preheating; Behind PVC/CPVC plasticizing bag roller, roller gap is adjusted into plays the triangle bag about 0.3 mm 3 times again, the thin slice that goes out 0.5～1.0 mm after the blend evenly is stand-by; The temperature of controlling 25 t vulcanizing presses is 180 ℃, behind the mould and die preheating, PVC/CPVC blend sheet stock is put into wherein, then is put in the vulcanizing press; Heat 10 min at 5～6 MPa, take out rapidly after 12～13 MPa heat 10 min, move in another vulcanizing press that does not heat, pressurize is cooled to room temperature; After the sample of compacting is placed 24 h, by national standard sample preparation and test.
2. method according to claim 1, it is characterized in that tensile property test undertaken by GB/T 1040-92, the bending property test is undertaken by GB/T 9341-88, and the test of cantilever beam impact property is undertaken by GB/T 9432-88, and the heat distortion temperature test is undertaken by GB/T 1634-89.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106700495A (en) * | 2016-11-28 | 2017-05-24 | 苏州意诺工业皮带有限公司 | Heat-resistant TPU/PVC/CPVC composite extrusion coating for light conveyor belt and preparation method thereof |
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Patent Citations (4)
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| CN101049709A (en) * | 2007-03-01 | 2007-10-10 | *** | Nano composite woody material, and preparation method |
| CN101987889A (en) * | 2009-08-07 | 2011-03-23 | 焦玉怀 | Rubber and plastic alloy material |
| CN102604195A (en) * | 2012-02-27 | 2012-07-25 | 青岛鑫三鸿塑胶制品有限公司 | EVA (ethylene vinyl acetate)/PE (polyethylene)/PVC (polyvinyl chloride) composite foam material and preparation method thereof |
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| CN106700495A (en) * | 2016-11-28 | 2017-05-24 | 苏州意诺工业皮带有限公司 | Heat-resistant TPU/PVC/CPVC composite extrusion coating for light conveyor belt and preparation method thereof |
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Application publication date: 20130327 |