摘要
通过DSC-TG联用仪与XRD衍射仪分析了间位芳纶纤维中分子量大小、分子量分散系数及结晶结构与其热裂解性能的关系。结果表明:芳纶纤维分子量越大、分子量分散系数越小以及冷结晶度越高,其裂解温度越高,其中纤维冷结晶能力取决于初始结构特点。纤维热裂解导致低分子量级分增多,颜色变深,纤维裂解开始时结晶度越高,裂解峰积分强度越大,有利于耐热性能增强。
The relationship between the structures of meta-aramid fibers, such as average molecular weight, molecular weight distribution coefficient, crystallinity, and its pyrolysis properties under a certain scale of temperatures were analysed through DSC-TG and X-ray diffraction instrument. Results showed that the pyrolysis temperature of aramid fibers can heighten with increase of average molecular weight, decrease of molecular weight distribution coefficient and improved re-crystallinity, also the re-crystallinity ability depends on primal structure of the aramid fiber. Pyrolysis causes increased low molecular weight and deepened color of the aramid fiber, and the integral intensity of DSC pyrolysis peak and heat-resistant ability can be enhanced with increased crystallinity at the start of pyrolysis process.
出处
《中华纸业》
CAS
北大核心
2008年第18期25-28,共4页
China Pulp & Paper Industry
基金
陕西省自然科学基金(2006B26)
陕西省教育厅产业化项目(05JC09)资助
关键词
芳纶纤维
分子质量
结晶度
热裂解
aramid fiber
molecular weight
crysal degree
pyrolysis
