HDPE/空心玻璃微珠复合材料非等温结晶研究

Study on Nonisothermal Crystallization of HDPE/HGB Composites

采用熔融共混挤出的方法,制备了高密度聚乙烯/空心玻璃微珠(HDPE/HGB)复合材料,用差示扫描量热法研究了HDPE和HDPE/HGB的非等温结晶过程,通过Jeziorny法研究了非等温结晶动力学。结果表明,随降温速率的增大,HDPE和HDPE/HGB试样的结晶峰温和结晶度降低,结晶速率增大;HGB的加入使结晶度增大,但对HDPE的结晶速率影响较小。

The composites of high density polyethylene （HDPE） and hollow glass beads（HGB） were prepared by extrusion molding. The nonisothermal crystallization behaviores of HDPE and HDPE/HGB were investigated using differential scanning calorimetry （DSC）. The nonisothermal crystallization kinetics of samples were extensively studied by Jeziorny＇s equation. The results show that the crystallization temperature and crystallinity decrease and the crystallization rate increases with the increasing of the cooling rate. The crystallinity is increased by adding HGB,and it has a little influence on the crystallization rate of HDPE.