天然橡胶/聚乙烯共混体相容性的研究

STUDY OF COMPATIBILITY OF NATURAL RUBBER/LOW DENSITY POLYETHYLENE BLENDS

本工作首先对橡胶/聚乙烯共混体系的相容性进行了计算,推测聚乙烯的非晶部分和橡胶间有一定的互容性,提出了橡胶和聚乙烯相互作用模型。然后用动态力学方法、有效网链密度测定、密度测定和广角X-射线衍射方法对天然橡胶分别未交联和交联的天然橡胶(NR)/低密度聚乙烯(LDPE)共混体系的相容性进行了验证。实验结果表明,LDPE非晶部分和NR之间存在一定的相互渗透。

Compatibility of natural rubber (NR)/low density polyethylene blends was calculated and it was predicted that compatibility existed between the amorphous part of polyethylene and NR. Based on above calculation and prediction, an interaction model of polyethylene and NR was suggested. Effective network chain density measurement, dynamic mechanical spectrum measurement, wide angle X-ray diffraction and density measurement have been used to verify the compatibility of natural rubber/low density polyethylene blends (NR either unvulcanized or vulcanized) as predicted by the calculation and proposed model. Experimental results show that there exist certain interaction between amorphous LDPE and NR.