单向拉伸流场中挤出双向自增强透明HDPE管材  

BIAXIALLY SELF-REINFORCED TRANSPARENT HDPE PIPES EXTRUDED FROM UNIAXIAL ELONGATIONAL FLOW FIELD

作　　者：吴世见[1] 陈利民[1] 申开智[1] 

机构地区：[1]四川大学高分子材料工程国家重点实验室,成都610065

出　　处：《工程塑料应用》2002年第8期23-26,共4页Engineering Plastics Application

基　　金：高等学校重点实验室访问学者基金;国家自然科学基金(20174026);教育部博士点基金(2000061021)

摘　　要：采用普通的工业用挤出设备,通过对加工参数的特殊控制,在单向拉伸流场中制得透明双向自增强高密度聚乙烯管材,其轴向拉伸强度比普通高密度聚乙烯管材提高了3.2倍,周向拉伸强度提高了1.4倍。利用SEM、DSC等测试手段对管材的微观结构进行了表征,揭示了管材双向自增强的原因是形成了串晶互锁结构,管材透明的原因是晶粒尺寸比可见光的波长小。By specially controlling the processing parameters, biaxially self-reinforced transparent high density polyethylene (HDPE) pipes were extruded from uniaxial elongational flow field using commercial extrusion equipment. 3.2 times of increase of axial tensile strength and an 1.4 times of increas of hoop tensile strength were achieved. Scanning electron microscopy( SEM) , wide-angel x-ray diffraction (WAXD) and differential scanning calorimetry(DSC) were employed to characterize the microstructure of HDPE pipes. The measurement results demonstrated that an interlocking shish-kebab morphology was formed in the self-reinforced pipe. The reason of transparency was the length of granular crystals in the self-reinforced HDPE pipe being shorter than the wave-length of visible light.

关 键 词：单向拉伸流场 挤出 双向自增强 透明HDPE 管材 高密度聚乙烯 串晶互锁结构 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]