摘要
提出了一种通过将PP/LGF复合母粒与少量(4%)较高熔体质量流动速率PP颗粒进行复配来改善注塑制品表面“浮纤”的新策略。采用光学显微镜(OM)、热重分析(TG)、扫描电子显微镜(SEM)以及力学性能测试等方法详细表征了所得LGFR-PP复合材料制品的微观结构与性能。发现复配后制品的“浮纤”含量降低了30%以上,且其力学强度基本没有劣化。这主要是由于高熔体流动速率PP的熔体流动性更好,在注塑过程中倾向于往制品表面扩散,扩散至表面的PP对玻璃纤维外露有较好的抑制作用。
A new strategy to improve the“floating fiber”phenomenon in injection-molded long glass fiber-polypropylene(LGFR-PP)products by compounding PP/LGF composite masterbatch with a small amount(4%)of high-melting-index PP was proposed.The structure and properties of the obtained LGFR-PP composite products were characterized using optical microscope(POM),thermogravimetric analysis(TGA),scanning electron microscope(SEM)and mechanical tests.The results indicate that the content of floating fibers is reduced by about 30%with the compounding,without sacrificing the mechanical properties of the PP/LGF composite products.This can be explained by the fact that the high melt-flowability makes the high-melting-index PP component easier to distribute on the product surface and then provide cover for the floating fibers.
作者
刘建萍
康鹏
高达利
郑云磊
白红伟
傅强
LIU Jianping;KANG Peng;GAO Dali;ZHENG Yunlei;BAI Hongwei;FU Qiang(College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China;SINOPEC Beijing Research Institute of Chemical Industry,Beijing 100013,China;CGN Juner New Materials Co.,Ltd.,Wenzhou 325011,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2022年第4期181-186,共6页
China Plastics Industry
基金
中国石油化工股份有限公司科技部项目(项目号219047)。
关键词
聚丙烯
长玻璃纤维
浮纤
Polypropylene
Glass Fiber
Floating Fiber
