摘要
在己内酰胺水解聚合时加入一定量的受阻胺类改性剂 ,合成出含有改性剂的改性尼龙 6树脂 ,研究了胺类改性剂对尼龙 6的熔体稳定性、相对粘度、端氨基含量及机械性能在热氧作用下的改善效果。实验表明 :随着胺类改性剂的加入 ,尼龙 6熔体表观粘度随剪切速率的升高而下降的趋势变缓 ,熔体加工稳定性提高 ;与空白试样相比 ,改性尼龙 6的端氨基含量都有不同程度的提高 ,高温作用下纤维的断裂强度及伸长率的变化幅度明显减小 ,热氧稳定性得到改善。添加 0 1份改性剂后 ,尼龙 6在热加工过程中相对粘度及端氨基含量的变化程度减小 ;树脂的初始热分解温度、最大热分解温度分别提高 3 62℃和 5 68℃。
Hindered amine modifiers were introduced during the hydrolytic polymerization of caprolactam, and an amine modifier modified nylon 6 resin was obtained. The improvements of the melt stability, relative viscosity, amino end group content and mechanical properties of nylon 6 by amine modifiers during thermo-oxidative treating were studied. The results showed with the addition of amine modifiers, first, the extent of shear-rate thinning of nylon 6 melt decreased and the melt stability of nylon 6 was improved; second, the amino end group content and the ratio of retained fraction strength increased. Thereby the thermo-oxidative stability of nylon 6 was also improved. When the content of amine modifiers was 0.1 phr, the variational degree of relative viscosity and amino end group content decreased; the original decompose temperature and max decompose temperature increased 3.62℃ and 5.68℃ respectively.
出处
《塑料工业》
CAS
CSCD
北大核心
2005年第1期46-48,共3页
China Plastics Industry
关键词
受阻胺类改性剂
尼龙6
熔体稳定性
热氧稳定性
端氨基
Hindered Amine Modifier
Nylon 6
Melt Stability
Thermo-oxidative Stability
Amino End Group
