摘要
采用带有热台的显微镜研究了200℃下聚丙烯树脂熔体沿玻璃纤维(束)的流动过程。实验结果表明:高黏的聚丙烯熔体能够在表面张力的作用下沿纤维束间的微观缝隙自发地流动,并且缝隙的间距越小,树脂的流动速率就越快;树脂熔体在经过一段时间的缓慢自发流动以后会加速流动。通过测试交叉纤维间熔体的间距,间接计算了聚丙烯树脂在该状态下自发流动的临界毛细管直径和自发流动的最低压力。
The flow of the melted polypropylene among the glass fibers was observed at 200℃ by a microscope with a heater. The results show that under the effect of the surface tension the melted polypropylene can flow spontaneously in the micro-pores formed by the fibers. With the decreasing of the fiber gap, the flow rate of the polypropylene resin increases obviously. And the flow rate of the polypropylene accelerates after a short time of the spontaneous flow. Furthermore, the critical capillary diameter between the fibers and the lowest pressure for the spontaneous flow can be calculated indirectly by determination of the width of the melted polypropylene in the cross fibers.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期219-223,共5页
Journal of East China University of Science and Technology
关键词
表面张力
浸渍
界面
玻璃纤维
聚丙烯
surface tension
impregnation
interface
glass fiber
polypropylene
