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为提高聚丙烯(PP)基复合材料的力学性能和热学性能,将不同质量分数的超微竹炭(UFBC)作为增强体引入聚丙烯,通过熔融挤出及注塑成型工艺制备UFBC/PP复合材料。利用SEM和DSC分析、力学强度和吸湿性测试等手段综合表征复合材料性能。结果表明:UFBC与PP基体间界面结合紧密;UFBC的添加对聚丙烯基复合材料的力学强度有较好的增强效果,UFBC质量分数为30%时,UFBC/PP复合材料的拉伸强度和弯曲强度达到较大值,分别为26MPa和54MPa,较纯PP分别提高了9%和18%;UFBC/PP复合材料的耐湿性仍保持较佳水平,吸湿率均小于0.1%;UFBC质量分数为40%时,熔融温度提高了3.1℃,UFBC质量分数为50%时,UFBC/PP复合材料的结晶温度提高了10.8℃,UFBC的添加有效地促进了UFBC/PP复合材料的结晶,改善了其加工性。
In order to improve the mechanical properties and thermal properties of polypropylene (PP) matrix composites, UFBC with different mass fraction was introduced into PP as reinforcement and UFBC / PP composites were prepared by melt extrusion and injection molding. SEM and DSC analysis, mechanical strength and hygroscopicity test were used to characterize the composite properties. The results showed that the interface between UFBC and PP matrix was tightly bonded. The addition of UFBC enhanced the mechanical strength of polypropylene matrix composites. When the UFBC mass fraction was 30%, the tensile strength and bending of UFBC / The strength of the UFBC / PP composites reached 26MPa and 54MPa respectively, which increased by 9% and 18% respectively compared with the pure PP. The moisture resistance of the UFBC / PP composites remained at a good level with the moisture absorption rate less than 0.1% and the UFBC mass fraction of 40 %, The melting temperature increased by 3.1 ℃, UFBC mass fraction was 50%, the UFBC / PP composites increased the crystallization temperature by 10.8 ℃. The addition of UFBC effectively promoted the crystallization of UFBC / PP composites and improved the processing Sex.