摘要
采用熔融共混挤出的方法,制备了尼龙(PA)6/LiCl复合材料,研究了不同含量的LiCl对PA6的结晶结构及性能的影响。傅立叶变换红外光谱、差示扫描量热、X射线衍射分析及力学性能测试结果表明,LiCl中Li+和PA6间产生了络合作用,破坏了PA6中原有的氢键,降低了PA6的分子链的规整排列,但该络合作用使PA6分子链间产生了比氢键更强的作用力。随着LiCl含量的增加,复合材料的结晶度逐渐降低,结晶温度和熔融温度也逐渐降低,拉伸、弯曲强度与热变形温度先降低后升高,缺口冲击强度则与之相反。当LiCl质量分数为4.5%时,PA6/LiCl复合材料的力学性能达到最佳。
The PA6/LiCl composites were prepared by meh blend extrusion. The effects of LiCl with different content on the crystallization structure and properties of PA6 were studied. The experimental results of DSC, XRD, FTIR and mechnical properties test showed that complexation was produced between Li^＋ of LiCl and PA6 and the original hydrogen bond of PA6 was destroied, the irregularity of molecular chains of PA6 was reduced. But the complexation induced that PA6 had stronger active force which was stronger than hydrogen bond among the molecular chains of PA6. As the content of LiCl increased, the crystallinity of PA6 decreased gradually, the crystallization temperature and melting temperature reduced steadily, the tensile strength, bending strength and thermal distortion temperature firstly decreased and then increased and the notched charpy impact strength was reverse. When the mass fraction of LiCl was 4.5% , the mechnical properties of PA6/LiCl composite were optimum.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2011年第9期71-74,共4页
Engineering Plastics Application
基金
国家自然科学基金项目(50863001)
关键词
尼龙6
氯化锂
络合
氢键
结晶
nylon 6, lithium chloride, complexing, hydrogen bond, crystallization
