变温聚合工艺对聚合反应速率及PVC树脂性能的影响  

The influence of heterothermal polymerization process on the polymerization rate and characteristics of the suspension PVC

作　　者：梁斌[1] 张磊[1] 于永玲[1] 鲍春伟[1] 车万里[1] 张学明[1] 

机构地区：[1]中国石油化工股份有限公司齐鲁分公司研究院,山东省淄博市255400

出　　处：《合成树脂及塑料》2013年第1期19-21,33,共4页China Synthetic Resin and Plastics

摘　　要：分别采用恒温和变温聚合工艺合成聚氯乙烯(PVC)树脂,研究了PVC树脂的基本性能。结果表明:采用变温聚合工艺,在压力下降阶段提高聚合温度制备PVC树脂,可提高聚合反应速率,树脂热稳定性和颗粒性能合格。与恒温聚合工艺所制树脂相比,变温聚合工艺所制PVC树脂的聚合度下降约40,相对分子质量分布由2.05增至2.15,热稳定性略有提高;较宽的相对分子质量分布改善了树脂的加工性能,据此优化加工配方可使制品保持良好的力学性能。Two poly（vinyl chloride） （PVC） resin samples were synthesized via isothermal polymerization process and heterothermal polymerization process, respectively, and the resin properties were studied. The results show that the polymerization rate can increase by raising polymerization temperature during period of the pressure drop, and thermal stability and grain properties of the produced PVC are qualified. In comparison with the PVC resin prepared by isothermal polymerization process, the PVC resin obtained by heterothermal polymerization process has average polymerization degree decreased about 40 , the relative molecular mass distribution of the latter increases to 2 . 15 from 2 . 05 of the former, and the thermal stability of the latter improves slightly. The processability of the resins so produced is improved owing to its wider relative molecular mass distribution, in the light of which the product can maintain excellent mechanical property by optimizing processing formulation.

关 键 词：聚氯乙烯 变温聚合 加工性能 力学性能 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]