RHEOLOGICAL HYBRID EFFECT AND ITS CONDITIONS IN FILLED MELTS OF ENGINEERING PLASTICS
Usually fiber-reinforced or particulate-filled polymer melts have increased viscosity compared to their corresponding matrix polymer melts. However, in contrast to this tendency, some filled polymer melts had a decreased melt viscosity in the presence of thermotropic (main chain) liquid crystalline polymer (LCP) compared to their neat polymer melts and those filler-loaded or LCP-blended, and had an even more decreased viscosity with increasing filler content. These phenomena were observed in several temary blend systems such as polycarbonate (PC)/glass fiber (GF)/LCP blends, polyamide 6 (PA6)/GF/LCP blends, PA6/glass bead (GB)/LCP blends, PC/nano-siliea/LCP blends, and seemed to be a trend in general. This viscosity reduction was termed as rheological hybrid effect with its definition of a phenomenon in which the melt viscosity of a temary polymer blend decreases with increasing filler loading, influenced by the minor polymer phase in the blend, and was found correlated well with the fibrillation of LCP melt droplets in these ternary systems. Importantly, these ternary systems had both, increased flow properties and enhanced mechanical performances, although the main load bearer remained the fiber or filler. These advantages would find potential application for engineering plastics and especially advanced engineering plastics such as polyethersulfone, polysulfone and polyetheretherketone.
Jiasong He
Key Laboratory of Engineering Plastics,Joint Laboratory of Polymer Science and Materials,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China
国际会议
5th International Symposium on High-Tech Polymer Materials(HTPM-V)(第五届国际高技术高分子材料学术会议)
北京
英文
175-176
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）