玻纤/聚丙烯直接注射成型及工艺参数影响研究  

Research on Direct Injection Molding of Glass Fiber/Polypropylene and the Effect of Process Parameters

作　　者：武明生 侯震 郑硕鵾 金志明[1] 张亚军[1] WU Mingsheng;HOU Zhen;ZHENG Shuokun;JIN Zhiming;ZHANG Yajun(School of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《材料导报》2025年第6期267-272,共6页Materials Reports

摘　　要：采用纤维直接喂入注射成型(DFFIM)“一步法”工艺制备了玻璃纤维增强聚丙烯复合材料(GF/PP),研究了注射速度和塑化温度对DFFIM制备复合材料性能的影响规律,并与“两步法”技术进行实验对比探究DFFIM技术的优势。结果表明:当注射速度从5 mm/s增加到45 mm/s时,GF/PP复合材料的力学性能呈现先提高后降低的趋势,在注射速度为15 mm/s时拉伸、弯曲和无缺口冲击强度分别取得最大值95.0 MPa、133.9 MPa和61.7 kJ/m^(2);塑化温度从205℃增加到250℃时,复合材料的力学性能逐渐提高,当塑化温度继续增加到265℃时,复合材料的拉伸和冲击强度增强趋势大幅降低,而弯曲强度由250℃时的133.9 MPa降低到132.9 MPa。与“两步法”成型技术相比,DFFIM制备的GF/PP复合材料有明显的纤维长度优势,但玻纤含量超过30%以后,其力学性能低于长玻纤增强聚丙烯(L-GFPP)粒料通过“两步法”制备的复合材料。GF/PP composites were prepared using the one-step process of direct fiber feeding injection molding(DFFIM),and the effect of injection speed and plasticization temperature on the properties of composites fabricated by DFFIM was studied,and the advantages of DFFIM technology were experimentally compared with the“two-step”technology.The results show that when the injection speed increases from 5 mm/s to 45 mm/s,the mechanical properties of GF/PP composites show a trend of first increasing and then decreasing,and the maximum tensile,ben-ding and unnotched impact strength are 95.0 MPa,133.9 MPa and 61.7 kJ/m^(2),respectively,at the injection speed is 15 mm/s.When the plas-ticizing temperature increases from 205℃to 250℃,the mechanical properties of the composite gradually improve,and when the plasticizing temperature continues to increase to 265℃,the tensile and impact strength of the composite decrease significantly,while the bending strength decreases from 133.9 MPa at 250℃to 132.9 MPa.Compared with the“two-step”technology,GF/PP composites fabricated by DFFIM have obvious fiber length advantages,but after the glass fiber content exceeds 30%,its mechanical properties are gradually lower than the composite fabricated by the“two-step”technology using L-GFPP pellets.

关 键 词：纤维直接喂入注射成型 两步法 玻纤/聚丙烯复合材料 工艺参数 纤维长度 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]