摘要
通过对低密度聚乙烯(LDPE)毛细管动态挤出物进行测试分析,探讨了振动力场对聚合物挤出物熔融结晶行为的影响。发现在LDPE熔体流动过程中叠加适当的振动力场后,LDPE挤出物的熔融始态发生明显变化,结晶度不变的同时,晶粒大小有较大降低,并认为这是振动力场对聚合物内部结构产生影响的结果。研究结果对聚合物动态成型加工新技术的深入理论研究具有十分重要的意义。
The effect of vibration force field on melting and crystallization behaviour of low density polyethylene (LDPE) was examined via the tests and analyses of LDPE extrudate in the process of capillary dynamic extrusion. After superimposed proper vibration field during the flow process of the LDPE melt, the initial melting state of the LDPE remarkably changed and the crystalline size decreased though the crystallinity remained unchanged. This phenomenon was attributed to the influence of vibration force field on the structure of the polymer. The result of this work was of great significance to deepening the theoretical study of the polymer vibromolding processing technology.
出处
《合成树脂及塑料》
CAS
2000年第5期19-21,25,共4页
China Synthetic Resin and Plastics
基金
国家自然科学基金(29904001
29634030和29625409)
高等学校国家重点实验室访问学者基金
广东省自然科学基金(994234)
关键词
低密度聚乙烯
振动挤出
熔融结晶
low density polyethylene
vibration
extrasion
melting
crystallization
