含羧酸共生稀土光敏剂的低密度聚乙烯膜紫外光氧化降解  

ULTRAVIOLET PHOTOOXIDATIVE DEGRADATION OF LDPE FILM CONTAINING INTERGROWTH RARE EARTH CARBOXYLATE PHOTOSENSITIZER

作　　者：林宜超 

机构地区：[1]福建省测试技术研究所

出　　处：《高分子学报》1997年第2期230-234,共5页Acta Polymerica Sinica

摘　　要：含羧酸共生稀土光敏剂的低密度聚乙烯膜紫外光氧化降解林宜超（福建省测试技术研究所福州３５０００３）近年来，许多作者先后研究并开发出含硬脂酸铈（ＣｅＳｔ３）光敏剂的可控光降解低密度聚乙烯（ＬＤＰＥ）［１，２］、高密度聚乙烯［３］、聚丙烯［４］、聚苯乙烯...The carbonyl indexes (CI) of low density polyethylen (LDPE) films containing intergrowth rare earth(La+Ce+Pr) carboxylate (RE(La+Ce+Pr)Car 3) with/without aromatic ketone (AK) mixing photosensitizers during ultraviolet (UV) photooxidation were determined by infrared spectroscopy.The effects of these photosensitizers on UV photooxidative rates and viscosity average molecular weights of LDPE films are studied by using CI as the index,and their action mechanism are discussed.Results show that RE(La+Ce+Pr)Car 3 and AK mixing photosensitizers may bring about the accelerated or retarded photooxidative degradation of LDPE films to varing degrees.After both UV irradiation and long stored duration these LDPE films containing above described photosensitizers still continued the stored oxidative degradation to a certain extent.

关 键 词：光敏剂 聚乙烯 薄膜 光氧化降解 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]