新助剂体系对聚甲醛MC90热稳定性能的影响  

Effect of New Auxiliary System on Thermal Stability of POM MC90

作　　者：孙亚楠 方伟 张彩霞 金政伟 袁炜 周涛[2] SUN Ya-nan;FANG Wei;ZHANG Cai-xia;JIN Zheng-wei;YUAN Wei;ZHOU Tao(Institute of Coal Chemical Industry Technology,China Energy Group Ningxia Coal Industry Co.,Ltd.,Yinchuan 750411,Ningxia,China;State Key Laboratory of Polymer Materials Engineering of China,Polymer Research Institute,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]国家能源集团宁夏煤业有限责任公司煤炭化学工业技术研究院,宁夏银川750411 [2]高分子材料工程国家重点实验室,四川大学高分子研究所,四川成都610065

出　　处：《合成材料老化与应用》2020年第4期47-48,159,共3页Synthetic Materials Aging and Application

基　　金：宁夏回族自治区2018年重点研发计划项目“煤基合成树脂高性能改性及综合利用研究”(编号:2018BDE02040)。

摘　　要：将受阻酚类抗氧剂A、有机亚磷酸酯类抗氧剂B、三聚氰胺和EBS复配后加入聚甲醛MC90中共混挤出,对不同复配助剂配方样品进行了熔体流动速率、热失重、不稳定端基含量、表面甲醛含量和氧化诱导期等分析测试。结果表明,6#助剂配方,即抗氧剂A:B=5:2,三聚氰胺添加量为0.1%,EBS添加量为0.1%时,MC90热失重5%的时间由36.1min提高至43.7min,不稳定端基含量由1220μg·g^(-1)降低至816μg·g^(-1),表面甲醛含量由6384μg/100gPOM降低至5089μg/100gPOM,氧化诱导期由19.9min提高至33.2min,该助剂配方能显著提高MC90的热稳定性能。The hindered phenolic antioxidant A,organic phosphite antioxidant B,melamine and EBS were mixed and extruded into polyformaldehyde MC90.The melt flow rate,thermal weight loss,the content of unstable end groups,the content of surface aldehydes and the oxidation induction period were measured.The results showed that the time of weight loss of 5%was increased from 36.1 min to 43.7 min when the additive formula of 6#was A:B=5:2,melamine 0.1%and EBS 0.1%,respectively,the content of unstable terminal group decreased from 1220μg·g-1 to 816μg·g-1,the content of surface aldehyde decreased from 6384μg/100 gPOM to 5089μg/100 gPOM,and the induction period of oxidation increased from 19.9 min to 33.2 min.

关 键 词：抗氧剂 热稳定剂 聚甲醛 热稳定性 

分 类 号：TQ322.3[化学工程—合成树脂塑料工业]