丙烯酸酯木塑复合材料增容剂的性能及应用

Application and performance of acrylate copolymer compatibilizer in wood-plastics composites

该文以含有双键官能团的硅氧烷和丙烯酸酯类为原料,通过自由基聚合方法,制备了丙烯酸酯类木塑增容剂,采用模压成型工艺制备了甘蔗渣/聚乙烯木塑复合材料,利用万能电子试验和冲击试验机测试其拉伸及冲击性能,结果表明,采用硅烷偶联剂KH-570和甲基丙烯酸缩水甘油酯等丙烯酸酯类的共聚物是较好的木塑复合材料增容剂,其共聚单体中引入的环氧基团可以和氨基硅烷偶联剂的氨基或纤维素中的羟基进行开环交联反应,使木粉纤维和丙烯酸酯类共聚物之间形成交联互贯网络,在甘蔗渣、增容剂和塑料之间形成均匀稳定的微观分散体系,降低了纤维素极性,增加了甘蔗渣与塑料之间的分散性和增容性,制得甘蔗渣木塑复合材料的拉伸强度为16.5MPa,冲击强度为19.1kJ/m2以上。

In this paper,the acrylate and the double band silane were copolymerized by radical polymerization methods to prepare the compatibilizer in wood-plastic composites(WPC).Mechanical properties of the composites were tested,such as tensile properties by universal material testing machine and impact property by impacting testing machine.The result showed that the mechanical properties of the composites would be better when the compatibilizer was added in WPC,the compatibilizer molecule could not only bond with the plant fiber,but also be compatible with plastic.The GMA monomer was introduced in the copolymer,the epoxy groups in GMA could be opened loop by the amino groups in silane or the hydroxyl group in the fiber,and the cross-linking structure and the stable microcosmic dispersions system was formed between the plant fiber,compatibilizer and the plastic.The compatibilizer reduced fiber polarity,increased dispersion and compatibility with the plastics.The tensile strength was 16.5 MPa and the impact strength of WPC was 19.1 KJ/m2.