高刚性聚甲醛结构与性能研究  

Analytical Study on the Structure and Properties of Highly Rigid POM

作　　者：杨军 王启 陈海华 许瑞[2] 周涛[2] YANG Jun;WANG Qi;CHEN Hai-hua;XU Rui;ZHOU Tao(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甲醇分公司,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》2024年第2期1-3,共3页Synthetic Materials Aging and Application

摘　　要：通过与通用级聚甲醛对比,研究了高刚性聚甲醛的各项性能。首先利用偏光显微镜照片对比,分析了聚甲醛MC90-H的球晶大小;力学性能测试表明,聚甲醛MC90-H的强度、模量均高于MC90,属于高刚性聚甲醛;在DSC曲线中,研究了聚甲醛的结晶温度和熔融温度以及结晶速率;MC90-H在热稳定性、游离甲醛含量、不稳定端基含量以及b值分析测试中均有较好的表现;然而,MC90-H的熔融指数稍有下降。通过研究高刚性聚甲醛的各项性能,可以得知开发高刚性与热稳定性聚甲醛兼顾的聚甲醛产品的重要性,让聚甲醛在高端应用场景中获得更好的表现。In this paper,the diff erences between general-purpose grade polyoxymethylene(MC90)and high rigidity POM(MC90-H)in terms of the various properties were studied.Firstly,the polarized light microscope photographs were observed to analyze the spherical crystal size of MC90-H;the mechanical property tests showed that the strength and modulus of MC90-H were higher than that of MC90,and it was a high-rigidity POM;the crystallization and melting temperatures as well as the crystallization rate of the paraformaldehyde were investigated by DSC;MC90-H was better than MC90 in the heat resistance,the content of free formaldehyde,the content of unstable end-groups,and the b value analysis tests.However,the melt index of MC90-H was slightly decreased.By studying the properties of the highly rigid polyoxymethylene,we can learn the importance of developing polyoxymethylene products with a balance of highly rigid and thermally stable polyoxymethylene,so that the polyoxymethylene can achieve better performance in high-end application scenarios.

关 键 词：聚甲醛 高刚性 热稳定性 

分 类 号：TQ322.3[化学工程—合成树脂塑料工业]