苯基脲作为PVC热稳定剂的应用  

Application of Phenylurea as a Heat Stabilizer for PVC

作　　者：林莅蒙[1] 吴茂英[1] 王锋[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006

出　　处：《塑料》2011年第4期28-32,共5页Plastics

基　　金：科技部科技型中小企业技术创新基金项目(08C26213600946)

摘　　要：用刚果红法和烘箱变色法比较研究以干混料和塑化料为试样时苯基脲(PU)、硫醇辛基锡(OTM)、硬脂酸钙(CaSt2)和硬脂酸锌(ZnSt2)对PVC的热稳定性能,结果表明:以干混料和塑化料为试样的测试结果存在明显差别,也就是说,以干混料为试样得到的热稳定性能测试结果不能反映实际应用条件下的表现,要获得对实际应用具有指导意义的热稳定性能结果,应以塑化料作为试样进行测试。根据以塑化料为试样的测试结果,PU具有类似于ZnSt2的热稳定特性,属于初效型主热稳定剂,与CaSt2环氧大豆油(ESBO)并用存在明显的协同效应;苯基脲的热稳定性能与1,3-二甲基-6-氨基尿嘧啶(DMAU)相比还存在较明显的差距,但透明性能和电绝缘性能则明显优于后者。The heat stabilizing performances of the plenylurea （ PU ） , octyhin mercaptides （ OTM ） , calcium stearate （ CaSt2 ） and zinc stearate（ZnSt2 ） on PVC using dry blends and plasticized strips as test samples was studied in comparison by Congo Red and oven discoloration method. It was shown that there existed marked differences between the testing results obtained using separatively the two different types of samples, that was, the results of heat stabilizing performances obtained using dry blends as samples could not mirror the features under practical conditions, and therefore, results of heat stabilizing performances that could provide a direction to practical application could only be obtained based on the testing using plasticized strips as samples. According to the results obtained based on the testing of plasticized strips, PU was a initial-term effective type primary heat stabilizer showing a thermal stabilization characteristics similar to ZnSt2 and remarkable synergitic effects with CaSt2 and epoxidized soybean oil（ESBO） , and had the heat stabilizing efficiency obviously worse than 1,3-dimethyl- 6-amino- uracil （DMAU） ,but transparency and electrical insulation performance were much better than DMAU.

关 键 词：苯基脲 聚氯乙烯 热稳定剂 热稳定性 透明性 电绝缘性 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]