三元乙丙橡胶/丁腈橡胶并用胶增容剂丙烯腈接枝三元乙丙橡胶共聚物的研制

Preparation of Acrylonitrile Grafted EPDM for Compatiblizer of EPDM/NBR Blend

采用溶液聚合法制备三元乙丙橡胶(EPDM)/丁腈橡胶(NBR)并用胶增容剂丙烯腈(AN)接枝EPDM(PANg-EPDM)共聚物,研究AN/EPDM用量比、引发剂BPO用量、溶剂种类、反应温度和反应时间对接枝率的影响。结果表明,在AN/EPDM用量比为5/6、引发剂BPO质量分数为0.005、溶剂为正庚烷、反应温度为70℃、反应时间为2.5 h的最佳溶液聚合反应条件下,PAN-g-EPDM共聚物的接枝率为26%,该接枝率的PAN-g-EPDM共聚物对EPDM/NBR并用胶增容性较好。

The compatiblizer for ethylene-propylene diene rubber（EPDM）/nitrile rubber（NBR） blend,acrylonitrile（AN） grafted EPDM（PAN-g-EPDM）,was prepared by solution polymerization,and the effects of the ratio of AN/EPDM,the amount of initiator BPO,solvent type,reaction temperature and reaction time on the grafting ratio were investigated. The results showed that the optimal reaction conditions were as follows：the ratio of AN/EPDM was 5/6,the mass fraction of initiator BPO was 0.005,the solvent was n-heptane,the reaction temperature was 70 ℃ and the reaction time was 2.5 h. The grafting ratio of obtained copolymer was 26% and the compatiblizing effect was good.