高韧性硬质聚氯乙烯透明材料的制备与性能  

Preparation and Properties of Rigid Poly(vinyl chloride) Materials with High Transparency and Toughness

作　　者：宋晓玲[1,2] 黄东 潘鹏举[1] 包永忠[1] 

机构地区：[1]浙江大学化学工程与生物工程学院化学工程联合国家重点实验室,浙江杭州310027 [2]新疆天业(集团)公司,新疆石河子832000

出　　处：《塑料工业》2015年第8期129-132,共4页China Plastics Industry

摘　　要：以有机锡为热稳定剂、甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物(MBS)核-壳粒子为增韧剂,制备了透光率大于85%、冲击强度为34.5 k J/m2的高抗冲硬质聚氯乙烯(PVC)透明材料,并研究了MBS、氯乙烯-丙烯酸丁酯共聚物[P(VC-co-BA)]的加入对PVC透明性、拉伸性能、冲击性能、热分解行为和玻璃化转变的影响。未改性、MBS或P(VC-co-BA)改性PVC材料均具有较高的透明度,透光率大于85%。添加MBS后,PVC的拉伸强度、模量降低,但冲击强度增大为原来的10倍;添加P(VC-co-BA)后,PVC的断裂伸长率增大,但拉伸强度、模量、冲击强度基本不变,表明与P(VC-co-BA)相比,MBS对PVC透明料具有更好的抗冲改性效果。所制备PVC透明材料具有较好的热稳定性,5%热失重温度大于270℃。添加MBS或P(VC-co-BA)后,PVC的热分解温度和玻璃化转变温度基本不变。Rigid poly （vinyl chloride） （PVC） materials with transmittance higher than 85 % and impact strength of 34.5 kJ/m2 were prepared by modifying PVC matrix with organic stannum compound as the thermal stabilizer and methyl methacrylate-butadiene-styrene （MBS） copolymer as the toughening agent. Effects of MBS and vinyl chloride-butyl acrylate copolymer [ P （VC-co-BA） ] on the transmittance, tensile property, impact strength, thermal degradation and glass transition of PVC were investigated. Both the modified and unmodified PVCs had high transmittances of over 85%. After adding MBS, the tensile strength and modulus of PVC slightly decreased, but its impact strength increased by 10 times. With addition of P（ VC-co-BA）, the elongation at break of PVC slightly increased, but its tensile strength and modulus and impact strength changed little. These results indicated that MBS had better toughening ability to PVC than P （VC-co-BA）. The as-prepared transparent PVC materials showed good thermal stability and their thermal degradation temperature for 5% weight loss was higher than 270℃. The thermal degradation temperature and glass transition temperature of PVC were nearly unchanged with addition of MBS and P（VC-co-BA）.

关 键 词：聚氯乙烯 透光率 冲击强度 机械性能 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]