木粉含量对PE-HD/木粉复合材料热性能及热流变性能的影响  

Effect of Wood Flour Content on Thermo and Rheological Properties of PE-HD/Wood Composites

作　　者：郭勇[1] 李大纲[2] 陈玉霞[1] 刘盛全[1] 熊福全[1] 

机构地区：[1]安徽农业大学,合肥230036 [2]南京林业大学,南京210037

出　　处：《工程塑料应用》2014年第1期31-35,共5页Engineering Plastics Application

基　　金：国家自然科学基金项目(31170514);安徽省高校木材科学与技术重点实验室资助项目(200407)

摘　　要：以回收高密度聚乙烯(PE-HD)为塑料基体,以木粉作为填充料,用微型挤出成型设备制备了PE-HD/木粉复合材料,研究了高填充含量的木粉对PE-HD/木粉复合材料热性能、热流变性能的影响。结果表明,随着木粉含量的增加,PE-HD/木粉复合材料的熔融峰温度降低,结晶峰温度增加;PE-HD/木粉复合材料的热分解分两个阶段,木粉含量的增加,降低了PE-HD的分解速度和PE-HD/木粉复合材料的分解总量;随着木粉含量的增加,PE-HD/木粉复合材料的表观黏度增大、假塑性增强,对剪切的依赖性增强,可以通过提高剪切速率降低材料的表观黏度。PE-HD / wood flour composites were prepared by mini extrusion equipment with recycled PE-HD as a plastic matrix and wood flour as a filler. The effects of highly filled wood flour content on the thermo and theological properties of PE-HD /wood flour composites were studied. The results show that the increase of the wood flour content in the composites can lower the melting peak temperature of the composite and enhance the crystallization peak temperature. The composite decomposition can be divided in two stages. The increase of wood flour content reduce PE-HD decomposition speed and the total decomposition amount of the composite. The increase of wood flour content in the composites can increase the apparent viscosity of the composite. With the increase of wood flour content, the composite pseudoplastic property and dependence on shear enhance, which can lower the apparent viscosity of the material by increasing shear rate.

关 键 词：木粉 高密度聚乙烯 木粉复合材料 热性能 热流变性 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]