将苎麻纤维(RF)、短切碳纤维(SCF)混杂加入低密度聚乙烯(LDPE)树脂中,考察了纤维混杂方式、马来酸酐接枝物添加方式对LDPE/RF/SCF(100/10/5)复合材料力学性能的影响。结果表明:以SCF/LDPE为表层,以RF/LDPE为芯层的夹芯结构LDPE/RF/SCF(100/10/5)复合材料拉伸强度较LDPE/RF(100/15)复合材料提高了49%,冲击强度提高78%;体系中添加3份的马来酸酐接枝物(LDPE-g-MAH)后,复合材料冲击强度提高了8%,马来酸酐接枝物改善复合材料冲击强度比改善拉伸强度更有效。扫描电镜结果表明LDPE-g-MAH能改善麻纤维、碳纤维与基体间的界面结合。
A ramie fiber/short-chopped carbon fiber/low density polyethylene(RF/SCF/LDPE) hybrid composite was developed.The effects of fiber hybrid modes and LDPE-g-MAH adding modes on the mechanical properties of LDPE/RF/SCF(100/10/5) were investigated respectively.The results showed that the tensile strength of LDPE/RF/SCF(100/10/5) with a “sandwich structure” when SCF/LDPE laminae as outer layer and RF/LDPE laminae as core layer was 49% higher than that of LDPE/RF (100/15) and the impact strength of composites increased by 78%. When the content of LDPE-g-MAH was 3phr,the impact strength of composites increased by 8%.The result also showed that LDPE-g-MAH was more effective in improving impact strength of composites,compared with tensile strength.SEM micrograph showed that LDPE-g-MAH can improve the interfacial bonding between the fibers and the matrix.
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基金资助
重庆市教委科学技术研究项目(KJ1709203)
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