新型叶片密炼机对HDPE／OMMT纳米复合材料结构与性能的影响  

Effects of Novel Vane Mixer on the Structure and Properties of HDPE/OMMT Nanocomposites

作　　者：吴明坤 李小博 邱峰 张桂珍 殷小春 瞿金平 

机构地区：[1]华南理工大学聚合物新型成型装备国家工程研究中心,聚合物成型加工工程教育部重点实验室,广东广州510640

出　　处：《塑料工业》2017年第3期114-118,130,共6页China Plastics Industry

基　　金：国家自然科学基金(51435005)

摘　　要：利用基于体积拉伸流变的新型叶片密炼机制备高密度聚乙烯(HDPE)/有机改性蒙脱土(OMMT)纳米复合材料。研究拉伸流场作用下,蒙脱土含量对复合材料微观相形态、热学、流变和力学性能的影响。结果表明,拉伸流场作用下,蒙脱土含量较大(5 phr)时,其也可以在HDPE基体中理想分散,形成插层或/和剥离的结构;复合材料的熔点(T_m)和耐热性能均有较大提高,结晶温度T_c几乎不变,结晶度呈先增加后降低的趋势;低频区复合材料的储能模量G'、损耗模量G″和复数黏度η*均随蒙脱土含量增加而增大;拉伸强度和断裂伸长率先增加后降低,蒙脱土含量在2~3 phr之间时有最大值,冲击强度整体呈下降趋势。High density polyethylene （ HDPE ） /organic modified montmorillonite （ OMMT ） nanocomposites were prepared by novel vane mixer based on elongational rheology. The effects of OMMT content on the micro morphology, thermal, theological and mechanical properties of the nanocomposites were studied at the function of elongational flow. The results show that ： although OMMT＇s content is high as 5 phr, at the function of elongational flow, it can be well dispersed and it is formed into intercalation and/or exfoliation structure. Both melting point and heat-resistant quality of the composites improve significantly. The crystallization temperature retains almost the same, and the crystallinity increases firstly and then decreases. At low frequency range, storage modulus and loss modulus and complex viscosity improve with the increase of OMMT content. The tensile strength and elongation at break increase firstly and then decline with the increase of OMMT content, and they reach the maximum value by 2 - 3 phr OMMT addition, while the impact strength generally declines.

关 键 词：叶片密炼机 高密度聚乙烯 有机改性蒙脱土 纳米复合材料 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]