γ辐照下HALS与抗氧剂在PP中的并用效应及机理研究 Ⅱ.γ辐照下HALS与抗氧剂在PP中的并用机理  

THE COMBINATION EFFECT AND MECHANISM OF HALS WITH ANTIOXIDANTS ON THE RADIATION RESISTANCE OF PPⅡ. THE MECHANISM OF THE COMBINATION EFFECT OF HALS WITH ANTIOXIDANTS

作　　者：汪辉亮[1] 彭涛[1] 陈文琇[1] 

机构地区：[1]北京师范大学化学系,北京100875

出　　处：《高分子材料科学与工程》2002年第4期143-146,150,共5页Polymer Materials Science & Engineering

基　　金：北京师范大学青年科学基金资助项目

摘　　要：通过测定在聚丙烯 (PP)中生成的氢过氧化物的浓度、辐照后 PP的质量变化以及羰基的生成等 ,研究了受阻胺光稳定剂 PDS[4 - (甲基丙烯酸 ) - 2 ,2 ,6 ,6 -四甲基哌啶醇酯和苯乙烯的共聚物 ]与几种类型抗氧剂在γ-辐射下在 PP中的并用机理。发现并用效果越好的体系中氢过氧化物的生成浓度越低 ,PP质量增加越少。认为 PDS与大多数抗氧剂并用得到协同效应的原因是更能有效地清除在 PP中生成的氢过氧化物和过氧自由基。The combination mechanism of PDS (copolymer of 2,2,6,6 tetramethyl 4 piperidinyl methacrylate (TMPM) with styrene) with several kinds of antioxidants was studied by measuring the concentration of hydroperoxide formed in PP, the mass increase of PP and the carbonyl index of PP. It was found that the concentration of POOH formed in PP, the mass increase of PP and the carbonyl index of PP are lower in the systems with better combination effect. It is believed that the reason for the synergism of PDS with most of the antioxidants is that they can remove the hydroperoxide and peroxy radicals formed in PP more effectively.

关 键 词：Γ辐照 HLAS 抗氧剂 并用效应 机理 研究 受阻胺光稳定剂 聚丙烯 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TQ320.4