蚕丝的接枝共聚反应动力学及其接枝结构  

Graft copolymerization kinetics of silk and its grafting structure

作　　者：蒋慧[1,2] 周利展[1,2] 刘文文[3] 杨雷[1,2,3] 沈一峰[1,2,3] 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018 [2]浙江理工大学材料与纺织学院,浙江杭州310018 [3]浙江理工大学生态染整技术教育部工程研究中心,浙江杭州310018

出　　处：《纺织学报》2014年第7期8-12,17,共6页Journal of Textile Research

基　　金：浙江省新苗人才计划资助项目(2012R406036);浙江省重点创新团队资助项目(2010R50038)

摘　　要：在蚕丝与DMAAm(N,N'-二甲基丙烯酰胺)的接枝共聚合反应中,分别加入2种RAFT(可逆加成-断裂转移)试剂,RAFT试剂与源自引发剂分解的自由基发生链转移反应,生成新的齐聚物自由基。研究发现,RAFT-ST3试剂断裂生成的PAA-PST*(聚丙烯酸-聚苯乙烯)自由基提高了接枝共聚合反应速率、蚕丝接枝率和单体接枝效率;RAFT-AA30试剂断裂生成的PST-PAA*自由基对接枝共聚合反应动力学无影响。FT-IR(傅里叶红外光谱)分析表明,RAFT试剂及其衍生物并未与蚕丝共价键链接,接枝率仍由PDMAAm接枝链贡献;SEM(扫描电镜)结果表明,与常规接枝蚕丝相比,RAFT反应提高了纤维表面接枝聚合物分布的均匀性。Two kinds of RAFT（ Reversible addition-fragmentation chain transfer） agents were introduced to mediate graft copolymerizations of silk fibers with DMAAm（ N,N＇-dimethyl acrylamide）. New oligomer radicals generated from the chain transfer reactions between RAFT agents and propagation radicals. The RAFT-ST3 released an oligomer radical of PAA-PST＊（ polyacrylic acid-b-polystyrene）,which accelerated graft copolymerization and increased silk grafting yield and monomer grafting efficiency. However,the kinetics was little influenced by the oligomer radical originated from RAFTAA30 agent that had a chain structure of PST-PAA＊. FT-IR（ Fourier transform infrared spectroscopy）spectra showed that,RAFT agents and their derivatives did not covalently bond with silk fibers. The grafting yield was still contributed by the grafted PDMAAm chains. SEM（ Scanning electron microscopy）analysis showed that,compared with conventional silk graft copolymerization（ without RAFT agent）,RAFT agents mediated reaction produced silk fibers with grafted PDMAAm chains distributing much more evenly on the outer surface.

关 键 词：RAFT反应 自由基聚合 接枝共聚合 蚕丝接枝 

分 类 号：TS102.3[轻工技术与工程—纺织工程]