采用粉末浸渍的方法制备连续玻璃纤维增强聚丙烯预浸料,经切割获得长纤维增强聚丙烯粒子,采用单螺杆挤出机挤出形成模塑料,探索了模塑料的压缩模塑成型工艺,研究了成型后材料的力学性能及其影响因素.结果表明:粉末浸渍的长纤维增强聚丙烯经压缩模塑后可获得力学性能优良的制品;随着预浸料切割长度的增大、纤维含量的增加,材料的力学性能提高;在基体聚丙烯中添加接枝极性基团的功能化聚丙烯,可改善体系的界面结合,提高材料的力学性能,但功能化聚丙烯的含量超过一定值后,材料的冲击强度有所下降;适当提高模具温度、模塑料温度及成型压力,可以提高材料的力学性能.
参考文献
| [1] | Baily R, Kraft H. A study of fiber attrition in the processing of long fiber reinforced thermoplastics [J]. International Polymer Processing, 1987,2(2):94-101. |
| [2] | Moriwaki Takeshi. Mechanical property enhancement of glass fiber-reinforced polyamide composite made by direct injection moulding process [J]. Composites: Part A, 1996,27A(5):379-384. |
| [3] | Cattanach J B, Guff G, Cogswell F N. The processing of thermoplastics containing high loadings of long and continuous reinforcing fibers [J]. Journal of Polymer Engineering, 1986,6(1～4):345-361. |
| [4] | Truckenmuller F, Fritz H G. Injection molding of long fiber-reinforced thermoplastics: A comparison of extruded and pultruded materials with direct addition of roving strands [J]. Polymer Engineering and Science, 1991,31(18):1316-1329. |
| [5] | Silverman E M. Effect of glass fiber length on the creep and impact resistance of reinforced thermoplastics [J]. Polymer Composites, 1987,8(1):8-14. |
| [6] | 周晓东, 周成玉, 张胜勇, 戴干策. 连续玻璃纤维增强聚丙烯预浸料粉末法浸渍过程及界面控制 [J]. 玻璃钢/复合材料,2000,(2):5-8. |
| [7] | Sathe S N. Grafting of maleic anhydride onto polypropylene: synthesis and characterization [J]. Journal of Applied Polymer Science, 1994, 53(2):239. |
| [8] | Zhou Xiaodong, Dai Gance, Lin Qunfang, Guo Wenjun. Influence of functionalized polyolefin on interfacial adhesion of glass fiber reinforced polypropylene [J]. Journal of Applied Polymer Science, 2000,76(8):1359. |
| [9] | 王宏岗, 郑安呐, 戴干策. 玻璃纤维增强聚丙烯界面结合的研究: 2. 界面剪切强度的影响因素及最佳值的判断 [J]. 复合材料学报,1999,16(3):51-56. |
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