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以由高压聚乙烯/丁腈橡胶/三元乙丙橡胶三者共混组成的三元共混聚合物为例,证明了原始聚合物的大分子特性在共混物综合性能的形成过程中起着决定性的作用。文中所述的大分子特性包括原始聚合物的分子量,分子量分布、单体在大分子分子链上的分布以及化学改性(部分交联),适当选择原始聚合物组分和进行化学交联可以将强度指标提高1～2倍并改善耐油性能。
Taking a ternary polymer composed of high pressure polyethylene / nitrile rubber / EPDM as an example, it is proved that the macromolecular properties of the original polymer play a role in the formation of the overall performance of the blend A decisive role. The macromolecular properties described herein include the molecular weight of the original polymer, the molecular weight distribution, the distribution of the monomers on the molecular chain of the macromolecule and the chemical modification (partial crosslinking), proper selection of the original polymer components, and chemical crosslinking Increase the strength index by 1 to 2 times and improve the oil resistance.