摘要
采用原子转移自由基聚合 (ATRP)和分步方法,制备了以苯乙烯 -丁二烯 -苯乙烯嵌段共聚物(SBS)为聚合物Ⅰ,聚(苯乙烯-甲基丙烯酸甲酯) [P(St-MMA) ]为聚合物Ⅱ的SBS/P(St-MMA)热塑性互穿聚合物网络(TIPN)。研究了P(St-MMA)质量分数、MMA/St(摩尔比 )和不同聚合方式对TIPN动态力学性能和黏结性能的影响。结果表明,采用ATRP法制备的TIPN的动态力学性能和黏结性能均优于常规自由基聚合制备的TIPN。高温区聚苯乙烯 (PSt)嵌段的玻璃化转变温度明显降低,而损耗角正切tanδ2 显著增加;TIPN的黏结性能也得到明显改善,拉伸剪切强度提高了 3倍多。
With styrene-butadiene-styrene block copolymer(SBS)as polymerⅠ,poly(styrene-methylmethacrylate) copolymerized by atom transfer radical polymerication(ATRP) as polymerⅡ, SBS/poly(styrene-methyl-methacrylate) thermoplastic interpenetrating polymer networks (TIPN) was prepared by sequential method. The effects of mass fraction of poly(styrene-methyl methacrylate), molar ratio of methyl methacrylate/styrene and different polymerization method on dynamic mechanical and adhesive properties of TIPN were investigated. The results showed that dynamic mechanical and adhesive properties of TIPN prepared by conventional radical polymerization were worse than those of ATRP. The glass transition temperature of polystyrene(PSt) in TIPN obviously decreased and greater increment of loss facter of PSt in TIPN were observed. Adhesive properties of TIPN were significantly improved, the increment of tensile shearing strength of TIPN exceeded 3 folds.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2005年第2期110-114,共5页
China Synthetic Rubber Industry
基金
橡塑新型材料合成国家工程研究中心基金资助项目(20001005)。
