含无机纳米粒子聚乙烯薄膜在高原地区应用的抗老化特性（2）  

Anti-aging Characteristic of PE Film with Inorganic Nano Particles in Altitude Area（2）

作　　者：郜华萍[1] 谭惠民[2] 

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650093 [2]北京理工大学材料科学与工程学院,北京100081

出　　处：《中国塑料》2007年第6期62-66,共5页China Plastics

摘　　要：以几种无机纳米粒子和光稳定剂体系与低密度聚乙烯（PE—LD）通过熔融挤出制备了PE—LD复合薄膜。采用红外光谱分析、氙灯人工气候老化试验箱、万能材料试验机等进行与老化特征有关的羰基指数、力学性能等进行较全面的对比测试。研究结果表明：含ZnO无机纳米粒子对高原紫外线的反射屏蔽作用很显著；无机纳米粒子＋光稳定剂在抗光氧化降解能力方面有协同效应；SiO2、ZnO无机纳米粒子在高原抗紫外光老化的同时，对力学性能的改善很显著。Films based on low density polyethylene （PE-LD） containing different inorganic nano particles and light stabilizer were prepared via melt extrusion. The aging behavior of the films was tested by IRS, xenon lamp, and universal test machine based on the changes in carbonal content and mechanical properties. It showed that ZnO played a very good function for shielding UV light in altitude area. Inorganic nano particles and light stabilizer provided synergetic effect on controlling the photo-oxidative degradation. Besides the resistance to UV light aging, SiO2 and ZnO also improved the mechanical properties.

关 键 词：无机纳米粒子 低密度聚乙烯薄膜 高原气候 老化特性 协同效应 光氧化降解 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业] TQ320.773