摘要
在聚己内酰胺（PA6）聚合过程中添加一定量的二（2，2，6，6-四甲基-3-哌啶胺基）-间苯二甲酰胺（SEED），制备了不同SEED含量的共聚改性PA6；研究了改性PA6的流变性、热稳定性、热氧化稳定性及端氨基含量的变化。结果表明：添加SEED后，PA6的起始热分解温度较未添加时的高2～10℃，PA6的热稳定性有所改善；SEED可显著提高PA6的端氨基含量，且随着其用量的增加端氨基含量增加；添加SEED后，PA6熔体黏度变小，出现剪切变稀的临界剪切速率明显增加，熔体的流动性和输送稳定性得到了提高；改性PA6中添加质量分数1％～2％SEED，有利于提高PA6熔体高速纺丝的稳定性和可控性。
A specific amount of bis （ 2,2,6,6-tetramethyl-3-piperidinyl ） -1,3-benzenedicarboxamide （ SEED ） was added into polycaprolactam （PA6） during the polymerization process to prepare copolymerized modified PA6 with different SEED content. The change in the rheological behavior, thermal stability, thermal oxidation stability and amino end group content of the modified PA6 was studied. The results showed that the initial thermal degradation temperature of PA6 was increased by 2 - 10 ℃ and the thermal stability was improved after adding SEED; the amino end group content of PA6 can be considerablly increased with the SEED addition ; the viscosity of PA6 melt was decreased, the critical shearing rate was profoundly increased at shear thinning occurrence, and the fluidity and transportation stability were improved after SEED addition; and the SEED mass fraction in the rage of 1% -2% helped improve the stability and controllability of the high-speed spinning process of PA6 melt.
出处
《合成纤维工业》
CAS
北大核心
2014年第3期6-9,共4页
China Synthetic Fiber Industry
