挤出与注塑工艺对玻纤增强聚丙烯性能的影响
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摘要
主要对三类玻纤增强聚丙烯材料GFPP-20、GFPP-35、GFPP-50进行研究,通过对挤出工艺、注塑工艺进行特定的优化使得材料力学性能有了明显提高,研究表明挤出速度250 r/min、挤出温度230℃、喂料速度40 r/min、注塑速度80%、注塑压力3 MPa、注塑温度230℃、螺杆背压0 MPa时,玻纤增强聚丙烯的性能最优。测试结果显示,GFPP-20的拉伸强度可达93 MPa、弯曲强度可达125 MPa,GFPP-35的拉伸强度可达123 MPa、弯曲强度可达169 MPa,GFPP-50的拉伸强度可达132 MPa、弯曲强度可达178 MPa。
The effects of extrusion and injection process on the performance of three kinds of short glass fiber filled polypropylene( PP) composites( GFPP-20,GFPP-35 and GFPP-50) were studied. Through the optimization of extrusion and injection process,the mechanical properties had been significantly improved.The study shows that the condition for the optimal performance of short glass fiber filled PP composites is250 RPM extrusion speed,230 ℃ extrusion temperature,40 r/min feed rate,80% injection speed,3 MPa injection pressure,230 ℃ injection temperature and 0 MPa backpressure. The test results indicate that the tensile and flexural strength of GFPP-20,GFPP-35 and GFPP-50 could achieve 93 MPa/125 MPa,123 MPa/169 MPa,and 132 MPa/178 MPa,respectively.
The effects of extrusion and injection process on the performance of three kinds of short glass fiber filled polypropylene( PP) composites( GFPP-20,GFPP-35 and GFPP-50) were studied. Through the optimization of extrusion and injection process,the mechanical properties had been significantly improved.The study shows that the condition for the optimal performance of short glass fiber filled PP composites is250 RPM extrusion speed,230 ℃ extrusion temperature,40 r/min feed rate,80% injection speed,3 MPa injection pressure,230 ℃ injection temperature and 0 MPa backpressure. The test results indicate that the tensile and flexural strength of GFPP-20,GFPP-35 and GFPP-50 could achieve 93 MPa/125 MPa,123 MPa/169 MPa,and 132 MPa/178 MPa,respectively.
引文
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