在准静态单向压缩条件下,测试和分析了聚丙烯(PP)/乙烯-1-辛烯共聚物(POE)/短玻璃纤维(SGF)三元泡沫复合材料的压缩性能,考察了SGF的质量分数对压缩弹性模量、屈服强度和能量吸收特性的影响.结果表明:PP/POE/SGF泡沫复合材料的压缩应力-应变曲线具有典型的弹性变形、屈服平台和致密化三个阶段;适量SGF的引入提高了压缩弹性模量、屈服强度和吸能能力,而在研究的范围内,较高含量(20%以上)的SGF才能提高泡沫复合材料的吸能效率,其增强效果不如吸能能力明显.
The compressive properties of polypropylene (PP)/ethylene-1-octene copolymer (POE)/ short glass fiber (SGF) ternary foamed composites were tested and analyzed under the quasi-static and uniaxial compressive loading condition. The effects of mass fraction of SGF on the modulus, yield strength and energy absorption behavior were discussed. The results show that the compressive stress-strain curves of PP/POE/SGF foamed composites are consisted of three typical stages: elastic behavior, plastic plateau and densification. The modulus, yield strength and capability of energy ab-sorption are enhanced by the addition of suitable SGF loading. The energy absorption efficiency of foamed composites is improved only when the incorporation of SGF beyond 20% in this investigative range and the reinforcement effect is not remarkable as capability of energy absorption shown.
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