摘要
通过偏光显微镜、差示扫描量热仪(DSC)、热重分析仪(TG)、熔体流动速率仪(MFR)研究了通用级聚甲醛和耐候级聚甲醛在结晶性能、热稳定性能、力学性能、耐候性能、MFR等方面的差异。结果表明:与通用级聚甲醛相比,耐候级聚甲醛的拉伸性能和弯曲性能相当;冲击强度、热稳定性能和耐紫外光性能有所提高;MFR,游离甲醛和不稳定端基含量有所降低。通过对2种聚甲醛的试验对比,分析二者之间的结构和性能差异,为耐候级聚甲醛的下游应用及进一步开发升级提供了重要的基础数据。
The differences of crystallization properties,thermal stability,mechanical properties,weather resistance and melt flow rate(MFR)between general grade polyoxymethylene and weather resistant grade polyoxymethylene were studied by polarizing microscope,differential scanning calorimeter,thermogravimetric analyzer(TG)and melt flow rate meter.The results show that compared with general grade polyoxymethylene,the tensile and bending properties of weather resistant polyformaldehyde are similar to those of general grade polyformaldehyde;impact strength,thermal stability and UV resistance have been improved;MFR,free formaldehyde and unstable end groups are reduced.Through the comparison of two kinds of polyformaldehyde,the difference of structure and performance between them is analyzed,which provides important basic data for downstream application and further development and upgrading of weather resistant polyformaldehyde.
作者
杨军
王启
高勇
许瑞
周涛
Yang Jun;Wang Qi;Gao Yong;Xu Rui;Zhou Tao(National Energy Group Ningxia Coal Industry Co.,Ltd.Methanol Branch,Yinchuan,Ningxia,750411;State Key Laboratory of Polymer Materials Engineering,Institute of Polymer,Sichuan University,Chengdu,Sichuan,610065)
出处
《现代塑料加工应用》
CAS
北大核心
2024年第1期23-26,共4页
Modern Plastics Processing and Applications
关键词
聚甲醛
耐候级
通用级
结构
性能
polyoxymethylene
weather resistant grade
general grade
structure
property
