摘要
采用差示扫描量热仪研究了原位增容聚酰胺6/高密度聚乙烯（PA6／PE-HD）共混物的等温结晶行为，采用Avrami方程分析了纯PA6和PA6／PE—HD共混物的等温结晶动力学，并通过Hoffman-Weeks理论计算出了共混物的平衡熔点。结果表明，二者的Avrami指数介于2．19～3．70之间，表明PA6晶体的生长方式为二维盘状生长和三维球晶生长并存，PEHD的加入并没有影响PA6晶体的生长方式。偏光显微镜分析表明，纯PA6能够生成球晶，但加入PEHD后，球晶尺寸明显变小，说明PE-HD的加入起到了异相成核的作用，加快了PA6的结晶过程。
The isothermal crystallization behavior of in situ compatibilized polyamide 6/high density polyethylene （PA6/PE-HD） blends was studied using differential scanning calorimetry. The isothermal crystallization kinetics was analyzed using Avrami equation. The calculated Avrami index n was between 2. 19 and 3.70, which demonstrated that the crystallization of PA6/PE-HD blends was growing three-dimensionally, which was confirmed by polarized optical microscopy observation. The equilibrium melting temperatures of PA6/PE-HD blends were obtained from Hoffman-Weeks method. With the addition of PE-HD, the size of PA6 spherulites became smaller obviously, which indicated that PE-HD played a role of heterogeneous nucleation.
出处
《中国塑料》
CAS
CSCD
北大核心
2011年第4期22-27,共6页
China Plastics
关键词
聚酰胺6
高密度聚乙烯
原位增容
等温结晶动力学
polyamide 6
high density polyethylene
in-situ compatibilization
isothermal crystallization kinetics
