原位聚合纳米PZDMA补强POE材料的研究

Insitu polymerized nanoPZDMA/POE composite

利用显微镜观察和热分析方法研究了原位聚合纳米聚甲基丙烯酸锌(PZDMA)补强乙烯 α辛烯共聚物(POE)材料(简称PZDMA补强材料)的纳米分散相结构的生成历程和补强机理,探讨了PZDMA补强材料的应力 应变特性及拉伸强度与温度的关系。结果表明,PZDMA补强材料的纳米分散相(聚甲基丙烯酸锌)是硫化过程中ZD MA发生原位聚合反应生成的;PZDMA补强材料强度高的主要原因是纳米PZDMA分散相与POE分子间的物理吸附松弛特性比化学吸附松弛特性好;PZDMA补强材料的应力 应变特性与炭黑补强POE胶料有明显差异,PZDMA补强材料的常温拉伸强度显著高于、高温拉伸强度低于炭黑补强POE胶料。

The development process and reinforcing mechanism of the nanodispersion phase structure in the insitu polymerized nanoPZDMA/POE were investigated by microscopy and thermogravimetric analysis and the dependence of the stressstrain behavior and tensile strength of PZDMA/POE composite on the temperature was also studied.The results showed that the nanodispersion phase (PZDMA) was formed by the insitu polymerization of ZDMA during vulcanization;the higher strength of PZDMA/POE composite was mainly contributed by the physical adsorption relaxation between nanoPZDMA dispersion phase and POE molecule rather than their chemical adsorption relaxation;and the stressstrain curve of PZDMA/POE composite was quite different from that of carbon black/POE compound,i.e. the PZDMA/POE composite gave the much higher tensile strength at the room temperature in contrast to the lower tensile strength at the elevated temperature when compared to carbon black/POE compound.