摘要
采用熔融挤出的方法,制备了 PA6/CaCl_2复合材料,研究了螺杆剪切强度对 PA6/CaCl_2复合材料的结晶过程和性能的影响。实验结果表明:随剪切强度的增大,CaCl_2与 PA6的络合反应程度越大,PA6/CaCl:复合材料的结晶度越小,结晶不完善程度越大,复合材料的黏度越大,熔体流动速率越小。复合材料的拉伸强度、冲击强度随剪切强度的变化存在极值现象,这与剪切强度对复合材料结晶度和络合反应的影响规律及其综合效应有关,低于某一临界剪切强度时,结晶度变化的影响占主导地位,超过这一临界剪切强度后,络合反应的变化影响占主导地位,导致复合材料相应性能随剪切强度的变化而改变。
The research focused on the effect of shear intensity on the crystallization process and the properties of the PA6/CaCl2 composites which were prepared through melting extrusion. With increasing shear intensity, the complex degree between PA6 and CaCl2 increased, the degree of crystallinity of PA6 decreased, the crystalline became more imperfect; the viscosity of PA6/CaCl2 melt increased. As the shear intensity increased, tensile strength and Izod impact strength of PA6/CaCl2 composites exhibited a maximum, which could be related to the degree of both crystallinity and complex. When the shear intensity was below a certain critical value, the effect of degree of crystallinity was dominant, otherwise, the effect of the complex reaction was dominant.
出处
《中国塑料》
CAS
CSCD
北大核心
2008年第6期62-66,共5页
China Plastics
基金
贵州省科学基金资助[J(2006)2103,黔科合丁字20072180号]
贵州省省长基金资助[黔省专合字(2006)104]
关键词
聚酰胺6
氯化钙
剪切强度
结构
性能
polyamide 6
calcium chloride
shear intensity
structure
property
