天然植物纤维增强聚乙烯性能研究

Study on Properties of Polyethylene Reinforced by Natural Plant Fiber

以氧杂蒽酮为光引发剂,γ-甲基丙烯酰氧基丙基三甲氧基硅烷为接枝单体,对聚乙烯(PE)进行紫外光引发接枝聚合。以接枝PE作为界面相容剂,制备黄麻纤维(40%)增强PE复合材料,研究复合材料的拉伸性能及耐热性。结果表明:硅烷成功接枝于PE颗粒表面。与未添加接枝PE的复合材料相比,接枝PE含量为15%时,复合材料的拉伸强度提高67.8%,维卡软化温度提升2.4℃。含接枝PE的复合材料中PE的结晶度更低,接枝PE在复合材料中起界面相容剂作用。

Polyethylene(PE)was subjected to UV-induced graft polymerization with xanthone as photoinitiator andγ-methacryloxypropyltrimethoxysilane as graft monomer.Jute fiber(40%)reinforced PE composites were prepared with grafted PE as interfacial compatibilizer,and the tensile properties and heat resistance of the composites were studied.The results show that silane is successfully grafted on the surface of PE particles.Compared with the composites without grafting PE,when the grafting PE content is 15%,the tensile strength of the composites is increased by 67.8%,and the Vicat softening temperature is increased by 2.4℃.The crystallinity of PE in the composites containing grafted PE is lower,and grafted PE acts as an interface compatibilizer in the composites.