POE-g-MAH对废旧EPDM/LLDPE共混体系的改性研究  

Modification of POE-g-MAH for w-EPDM / LLDPE Blends

作　　者：李庆业[1] 吴贺君[2] 卢灿辉[1] 

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,四川成都610065 [2]四川农业大学食品学院包装工程系,四川雅安625000

出　　处：《塑料工业》2015年第12期28-31,86,共5页China Plastics Industry

基　　金：高分子材料工程国家重点实验室开放课题基金资助(sklpme 2014-4-34);863计划课题(2012AA063003)

摘　　要：以马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)为相容剂,通过熔融共混技术对废旧三元乙丙橡胶胶粉(w-EPDM)/线型低密度聚乙烯(LLDPE)共混体系进行增容改性,研究了w-EPDM/LLDPE共混比和POE-g-MAH增容效果对共混物的力学性能、微观形态、热性能和流变特性的影响。结果表明,随着胶粉含量增加,w-EPDM/LLDPE共混体系的拉伸性能、硬度和热性能都降低;在相同胶粉含量下,加入POE-g-MAH后,w-EPDM和LLDPE相容性得到明显改善,两相间界面模糊且相互作用增强,有效提高了共混体系的力学性能和热稳定性,也使体系拥有较大的复数黏度和储能剪切模量。Maleic anhydride graft polyethylene-octene copolymer （POE-g-MAH） was used as a eompatibilizer in the blends of waste ethylene propylene terpolymer powder （w-EPDM） and linear low density polyethylene （LLDPE）. Effects of w-EPDM content and the addition of POE-g-MAH on the mechanical properties, morphology, thermal and rheological properties of the blends were determined respectively. The results show that with the increase in w-EPDM powder content, the tensile strength, hardness and thermal stability of w-EPDM/LLDPE blends decrease. In the same rubber content, the compatibility of w-EPDM and LLDPE is significantly improved after the addition of POE-g-MAH. The interface of the two phases becomes fuzzy, indicating an excellent interaction between w-EPDM and LLDPE. As a result, the blends modified with POE-g-MAH have better mechanical properties and thermal stability, as well as the higher complex viscosity and storage modulus.

关 键 词：废旧三元乙丙橡胶 聚乙烯 相容剂 力学性能 

分 类 号：TQ317[化学工程—高聚物工业]