抗氧剂1010对聚甲醛性能的影响.pdf

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化工进展
2011年第30卷第8期
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
1795
研究开发
抗氧剂1010对聚甲醛性能的影响
张丽娟,成審2,丁雪佳,张雨,周克斌,郭甜甜,韩海军
(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)
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。偏光显徽镜
(PLM)和差示担描量热仪(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。
关键词:聚甲醛;抗氧剂;紫外老化;共混
中图分类号:TQ42
文献标志码:A
文章编号:1000-6613(2011)08-1795-05
Effect of antioxidant 1010 on properties of polyoxymethylene
ZHANG Lijuan CHENG Rui, DING Xuejia ZHANG Yu, ZHOU Kebin
GUO Tiantian, HAN Haijun
( Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemica!
Technology, Beijing 100029, China; The Second Artillery Force Military Representative Office
31st Institute, Beijing 100074, China
Abstract: 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 propertics of the blend. The cffect of different compositions on mechanical
properties and microstructure of POM was studied. Analysis with polarized light microscopy(PLM)
and differential scanning calorimetry(DS showed crystallizing nucleation effccts of antioxidant and
COPA on POM. The contents of both antioxidant and COPA of 0.S% 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%o, its complex viscosity was higher than POM. After UV ageing
the complex viscosity of the blend was also higher than POM
Key words: polyoxymethylene; antioxidant; ultraviolet aging; blends
聚甲醛(POM)是一种主链上含有氧化亚甲基
CH2O-)链节的线型高分子化合物,是无支链收稿目期:20101203修改稿日:2010410
基金项目;科技部科技人员服务企业行动项目(20090JA1004508)。
的高熔点、高密度、高结品性热塑性工程塑料,现
第一作者:张丽娟(1985-),女,硕土研究生。联系人:丁雪佳,
已成为五大通用工程塑料之一。但由于POM具有副教投。E-maildingxi@mailbuct.edu.cn