摘要
通过测量不同条件下聚对苯二甲酰对苯二胺(PPTA)溶液的比浓对数黏度,分析在PPTA纺丝前可能引起聚合物降解的因素,这些因素包括纺丝液浓度、残余的CaCl2、N-甲基-2-吡咯烷酮、水分和氢氧化钙等,最终得到水分和氢氧化钙对PPTA的降解影响很大,其余影响较小的结论。同时,分析了降解前后聚合物的结构和性能,发现降解结果是部分端胺基被氧化成硝基。
The factors that may cause degradation of poly （p-phenylene terephthalamide）（PPTA） during preparation were studied by measuring the inherent viscosity. The degradation rate of PPTA was influenced by the factors such as procession time, spinning solution concentration, CaCl2 content in the spinning solution as well as 1-Methyl-2-pyrrolidinone （NMP）, H2O and Ca（OH）2 in the spinning solution. The results showed that H20 and Ca（OH）2 had more effect on the degradation of PPTA than the others and some-NH2 was oxidated to -NO2.
出处
《合成纤维》
CAS
北大核心
2008年第8期15-17,21,共4页
Synthetic Fiber in China
