通过在聚乳酸(PLA)/玉米秸秆(CS)复合材料中引入聚碳酸亚丙酯(PPC)改善韧性,使用熔融挤出与热压成型相结合的方式制备聚乳酸/聚碳酸亚丙酯/玉米秸秆(PLA/PPC/CS)复合材料,以热压时间、热压压力和热压温度为变量,以PLA/PPC/CS复合材料的冲击、弯曲和拉伸性能为评价指标设计单因素试验.试验结果表明,热压时间、热压压力、热压温度对PLA/PPC/CS复合材料的力学性能影响显著.最终优化出的热压工艺条件为热压时间10 min,热压压力7.5 MPa,热压温度190 ℃.
To improve the toughness of the PLA/corn stalk composite, the introduction of polypropylene carbonate(PPC)was used. The PLA/PPC/corn stalk(PLA/PPC/CS)composite was prepared using a combination of melt extrusion and hot pressing. A single factor experiment was designed with hot pressing time, hot pressing pressure, and hot pressing temperature as variables, and the impact, bending, and tensile properties of the PLA/PPC/CS composite as evaluation indicators.The results showed that the hot pressing time, hot pressing pressure, and hot pressing temperature had significant effects on the mechanical properties of PLA/PPC/CS composites.The final optimized hot pressing process is: hot pressing time is 10 min, hot pressing pressure is 7.5 MPa, and hot pressing temperature is 190 ℃.
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