【摘要】 采用氮氧稳定自由基聚合制备了苯乙烯和4-乙烯吡啶嵌段共聚物(PS-b-P 4VP),聚合物的分子量及其分布以及结构分别用凝胶渗透色谱(GPC)和核磁(1H-NM R)进行了表征。并用原子力显微镜(AFM)对PS-b-P 4VP增容PS/P 4VP效果进行了研究。结果表明,在氮氧稳定自由基(HTEM PO.)存在下,用过氧化苯甲酰(BPO)引发苯乙烯聚合,所制备聚苯乙烯的分子量分布在1.15~1.25范围;将该聚苯乙烯溶于4-乙烯吡啶可以继续引发4-乙烯吡啶的聚合反应,共聚物的分子量分布在1.12~1.30范围。1H-NM R说明共聚物为嵌段共聚物。AFM结果说明所合成的嵌段共聚物PS-b-P 4VP是PS与P 4-VP的良好增溶剂。更多还原

【Abstract】 In this paper,a series of polystyrene and polystyrene-block-poly(4-vinylpyridine)(PS-b-P4VP) were synthesized by using Living free radical polymerization initiated by Benzoyl Peroxide(BPO) in the presence of 4-hydroxyl-2,2,6,6-tetramethylpiperridine-oxyl-1(HTEMPO·).Experimental results show that the polymerization of styrene has Living’ nature,the polydispersity of synthesized polystyrene is in the range of(1.15) to (1.25).The polystyrene with Living’ ends can initiate the living free radical polymerization of 4-Vinylpyr-idine in the presence of 4-hydroxyl-2,2,6,6-tetramethylpiperridine-oxyl-1 to sequentially form the polystyrene-block-poly(4-vinylpyridine) with polydispersity in the range of(1.12) to(1.30).The structure of diblock was determined by()~1H-NMR.The diblock polymerization(PS-b-P4VP)is good compatibiliers for PS and P4VP.更多还原