玻纤含量对短玻纤增强聚丙烯复合材料水辅注塑制品壁厚与微观形态的影响  

Influence of Glass Fiber Contents on the Residual Wall Thickness and Microscopic Morphology of Water-Assisted Injection Molding Pipes of Short-Glass-Fiber Reinforced Polypropylene Composites

作　　者：匡唐清 冯强 徐盼 赖德炜 柳和生[2] Tangqing Kuang;Qiang Feng;Pan Xu;Dewei Lai;Hesheng Liu(School of Mechatronics&Vehicle Engineering,East China Jiaotong University,Nanchang 3300139 China;School of Mechanical and Electric Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]华东交通大学机电与车辆工程学院,江西南昌330013 [2]东华理工大学机电工程学院,江西南昌330013

出　　处：《高分子材料科学与工程》2020年第2期105-111,119,共8页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51563010,21664002)。

摘　　要：以玻纤质量分数分别为10%、20%、30%、40%的短玻纤增强聚丙烯复合材料制备了系列水辅注塑管件,观测比较了实验条件下玻纤含量对沿流动方向的壁厚及玻纤的取向分布的影响。发现在实验条件下,沿流动方向管件的壁厚呈逐渐增大的趋势,随着玻纤含量的增加,管件壁厚逐渐减小;玻纤的分布在管件壁厚层可分为近模壁层、中间层、近水道层三层;在近模壁层和近水道层玻纤的取向度较高,但在玻纤含量较高时存在玻纤断裂现象;中间层的玻纤取向度较低。最后从水辅助注塑的流场特点及玻纤的相互作用阐述了玻纤含量对管件壁厚及玻纤取向分布的影响机理。Some pipes of short-glass-fiber reinforced polypropylene composites with glass fiber mass fractions of 10%, 20%, 30% and 40% were obtained by water-assisted injection molding(WAIM) process. The wall thickness along the flow direction and the orientation distribution of glass fibers were observed and compared. It is found that the wall thickness of pipes increases gradually along the flow direction, and decreases gradually with the increase of glass fiber content. The distribution of glass fibers in the wall thickness of pipes can be divided into three layers: near-mold-wall layer, middle layer and near-water-channel layer. The orientation of glass fibers in the near-mold-wall layer and near-water-channel layer is higher, but the glass fibers are broken when the glass fiber content is higher. The orientation of glass fibers in the middle layer is low. Finally, the influence mechanism of glass fiber content on the residual wall thickness and orientation distribution of glass fibers was discussed from the flow field characteristics of WAIM and the interaction of glass fibers.

关 键 词：短玻纤增强聚丙烯 水辅注塑 玻纤含量 壁厚 微观形态 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]