木塑复合材料配方组成对其线性热膨胀系数的影响  

Effect of Main Components on the Linear Thermal Expansion Coefficient of Wood-Plastic Composite

作　　者：蔡培鑫[1] 吕群[1] 梁梦杰[1] 来国桥[1] 

机构地区：[1]杭州师范大学材料与化工化学学院,浙江杭州310036

出　　处：《塑料》2011年第6期79-82,86,共5页Plastics

基　　金：浙江省重大科技专项(优先主题)(2008C13G2150004)

摘　　要：以PP、HDPE、POE、EPDM或其共混物作为塑料基体,以木粉作为填充料,用挤出成型法制备了PP/PE基和PP基木塑复合材料(WPC),研究了配方中各组分的热膨胀特性、配方中塑料基体组成变化、以及配方中木粉含量变化等因素对所制得的WPC线性热膨胀系数的影响。结果表明:制备WPC的主要原料线性热膨胀系数的大小顺序为:木粉<聚丙烯<聚乙烯<增韧剂,其中各塑料成分的线性热膨胀系数均远大于木粉,随着WPC中塑料含量增加,WPC的线性热膨胀系数增加;随着配方中PP/PE比值增加,WPC的线性热膨胀系数减小;随着配方中增韧剂EPDM或POE用量增加,WPC的线性热膨胀系数增大。Wood plastic composites（WPC） were prepared by extrusion with PP, HDPE, POE, EPDM or their blends as a plastic substrate and wood flour as a filler. The effects of the thermal expansion characteristics of the components, the plastic substrate composition and wood flour content in the formulas on the linear thermal expansion coefficient of WPC were studied. The results showed that the order of linear thermal expansion coefficients of main raw materials in WPC was that wood flour 〈 PP 〈 PE 〈 toughening agent and the linear thermal expansion coefficient of WPC increased with increasing the plastic content because that the linear thermal expansion coefficient of the plastic was much greater than wood flour. The linear thermal expansion coefficient of WPC decreased with increasing PP/PE ratio in the formula and increased with increasing the amount of toughening agents EPDM or POE.

关 键 词：木塑复合材料 塑料 木粉 线性热膨胀系数 配方 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]