抗氧剂和光稳定剂对PE-LLD紫外光老化的稳定作用  

Stabilization Effect of Antioxidants and Light Stabilizers on UV-light Aging of PE-LLD

作　　者：杨浩邈[1] 胡斌[2] 吴鹏[3] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]中国石油独山子石化公司研究院,新疆独山子833600 [3]新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《中国塑料》2011年第10期64-68,共5页China Plastics

摘　　要：研究了抗氧剂1010、168与光稳定剂622对线形低密度聚乙烯(PE-LLD)抗紫外光老化性能的影响,并通过拉伸性能测试和凝胶渗透色谱等手段对PE-LLD老化前后的拉伸性能、相对分子质量及其分布进行了研究。结果表明,纯PE-LLD经紫外光老化3d后,其断裂伸长率保留率就降低到50%以下;单独添加0.15份抗氧剂1010、168或光稳定剂622,PE-LLD的断裂伸长率保留率分别在紫外光老化7、6和15d后降低到50%以下;抗氧剂1010、168与光稳定剂622复配使用时,可显著提高PE-LLD的抗紫外光老化性能,具有明显的协同效应。The UV stabilizing effects of antioxidant 1010, 168 and light stabilizer 622 on linear low density polyethylene （PE-LLD） were studied. Mechanical testing and gel permeation chromatography were carried out to study tensile properties and molecular weight of PE-LLD before and after UV-light aging. When antioxidant and light stabilizer were absent, the reserved elongation at break of PE-LLD was less than 50% after UV-light aging for 3 d, With adding 0.15 phr of antioxidant 1010, 168 and light stabilizer 622 separately, the time of UV-light aging needed to decrease the elongation at break below 50% were extended to 7, 6 and 15 d, respectively. When antioxidant 1010, 168 and light stabilizer 622 were used together, an obvious synergistic effect on the UV-light resistance of PE-LLD was observed.

关 键 词：线形低密度聚乙烯 紫外光老化 抗氧剂 光稳定剂 协同效应 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]