抗氧剂1010对聚甲醛性能的影响  

Effect of antioxidant 1010 on properties of polyoxymethylene

作　　者：张丽娟[1] 成睿 丁雪佳[1] 张雨[1] 周克斌[1] 郭甜甜[1] 韩海军[1] 

机构地区：[1]北京化工大学新型高分子材料制备与加工北京市重点实验室,北京100029 [2]第二炮兵驻31所军事代表室,北京100074

出　　处：《化工进展》2011年第8期1795-1799,共5页Chemical Industry and Engineering Progress

基　　金：科技部科技人员服务企业行动项目(2009GJA1004508)

摘　　要：选用抗氧剂1010作为大分子自由基的捕捉剂,共聚酰胺(COPA)作为甲醛的吸收剂对聚甲醛(POM)共混体系进行紫外老化性能研究,考察不同组成的复合体系对POM力学性能和微观结构的影响。偏光显微镜(PLM)和差示扫描量热仪(DSC)分析结果表明:少量抗氧剂1010和COPA对POM起到了结晶成核作用,当抗氧剂和COPA含量均为0.5%时,POM耐紫外老化性能较佳。此时,力学性能优异。热重分析结果表明:加入抗氧剂后,POM分解温度有所提高。流变行为研究表明:POM共混体系呈现典型的非牛顿流体行为,当抗氧剂含量小于0.5%时,共混体系复数黏度均高于纯POM;紫外老化后性能亦如此。Antioxidant 1010 and copolyamides（COPA）were used as large molecules free radical scavenger and formaldehyde absorbents for polyoxymethylene（POM）respectively,to investigate the ultraviolet（UV）aging properties of the blend.The effect of different compositions on mechanical properties and microstructure of POM was studied.Analysis with polarized light microscopy（PLM）and differential scanning calorimetry（DSC）showed crystallizing nucleation effects of antioxidant and COPA on POM.The contents of both antioxidant and COPA of 0.5% gave the best performance of UV aging.Mechanical properties were also excellent.TGA results showed that decomposition temperature of the blend was higher.The blend presented typical non-Newtonian fluid behavior,and when antioxidant contents was less than 0.5%,its complex viscosity was higher than POM.After UV ageing,the complex viscosity of the blend was also higher than POM.

关 键 词：聚甲醛 抗氧剂 紫外老化 共混 

分 类 号：TQ42[化学工程]