【摘要】 <正> 近年来,大分子单体的合成及其共(自)聚合正日渐成为高分子合成中非常活跃的领域。本试验室曾合成了具有烯丙基端基的聚苯乙烯大分子单体(PS-allyl),并将其与乙烯、丙烯共聚合得到了乙丙共聚物(EPR)为主干、聚苯乙烯(PS)为支链的接校共聚物EPR-g-PS。本工作以5-溴甲基-2-降冰片烯(BrMNB)与聚苯乙烯阴离子(PS~-)偶合,制备具有降冰片烯端基的聚苯乙烯大分子单体(PS-NB)。更多还原

【Abstract】 Polystyrene macromer with a norbornene end group (PS-NB) was prepared by coup~-ling polystyrene anion (PS~-) with 5-bromomethylnorbornene (BrMNB) in a mixed sol-vent of cyclohexane and tetrahydrofuran (THF).Molecular structure of the macromer wascharacterized by ~1H NMR,IR, and GPC methods. Investigation on the coupling reactionparameters showed that presence of polar solvent THF greatly improved coupling effi-ciency. Without additional separation procedure, pure PS-NB was able to be synthesizedwhen volume fraction of THF was up to 10% and [BrMNB] / [FS~-] ratio up to 4.更多还原