摘要
采用熔融共混法制备了聚酰胺6/煤矸石复合材料,研究了复合材料的力学性能、微观结构、结晶行为和流变性能。结果表明：煤矸石的加入使聚酰胺6的的拉伸强度、弹性模量、弯曲强度和弯曲模量分别增加了约53．8%、66．1%、37．1%和63．4%,而冲击韧性基本保持,煤矸石最佳填充量为25%；煤矸石在聚酰胺6基体中分散均匀,复合材料具有韧性断裂特征；煤矸石使聚酰胺6的结晶温度由187．0℃升高到191．3℃,过冷度由33．6℃降至18．9℃,结晶温度范围变窄,即煤矸石提高了聚酰胺6的结晶速率,对聚酰胺6具有异相成核作用；在所研究的剪切速率范围内,聚酰胺6及其复合材料的流变行为表现为假塑性,煤矸石的加入使非牛顿指数减小,聚酰胺6对剪切敏感性下降。
PA6/coal shale powder （CSP） composites were prepared via melt blending, whose mi- crostructure, mechanical properties, crystallization behaviors, and rheological behaviors were studied. CSP was dispersed uniformly in the PA6 matrix. With the CSP content increasing, the tensile and flex- ural properties of composites gave rise to maxima, with 25 wt % being the optimal. The tensile strength, tensile modulus, flexural strength, and flexural modulus of the composite were 53.8 %, 66.1%, 37.1%, and 63.4 % higher than neat PA6, respectively, with a cost of only 9.3 % decrease in Izod impact strength. DSC showed that CSP increased the crystallization temperature, accelerated the crystallization, and narrowed the range of crystallization temperature of PA6. The composites was pseu- doplastic fluids. With increasing CSP content, the non-Newtonian indexes decreased and the shear thin- ning weakened.
出处
《中国塑料》
CAS
CSCD
北大核心
2006年第7期35-39,共5页
China Plastics
基金
河南省杰出人才创新基金(0421001400)
关键词
煤矸石
聚酰胺6
力学性能
微观结构
结晶行为
流变性能
coal shale powder
polyamide 6
mechanical property
microstructure
crystallization be-havior
rheological behavior
作者简介
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