摘要
通过对ＳＯＣｌ２／ＴｉＣｌ４引发体系的α－蒎烯（Ｍ１）／苯乙烯（Ｍ２）共聚产物进行ＧＰＣ、１ＨＮＭＲ以及微臭氧化－薄层层析法等分析表征，证明该引发体系能在宽广的单体投料比范围内实现有效共聚。在确认仅生成共聚物的反应条件下，采用Ｍａｙｏ－Ｌｅｗｉｓ式积分法测得该体系在－３０℃、［ＳＯＣｌ２］＝２０ｍｍｏｌ／Ｌ、［ＴｉＣｌ４］＝６０ｍｍｏｌ／Ｌ、ＣＨ２Ｃｌ２溶剂中的竞聚率分别为苯乙烯ｒ２＝２．３１±０．１５；α－蒎烯ｒ１＝０．５２±０．０６。
The cationic copolymerization of α pinene(M 1) and styrene(M 2) was carried out with SOCl 2/TiCl 4 initiating system in CH 2Cl 2 at -30 ℃. The products were analyzed by GPC, 1H NMR and thin layer chromatographer combined with micro ozonization respectively. The results show that SOCl 2/TiCl 4 leads to effective copolymerizations with wide rang of monomer feed ratios. Under the conditions that only pure copolymer was obtained, the monomer reactivily ratios were determined. Thus when =20 mmol/ L and =60 mmol/L in CH 2Cl 2 at -30 ℃, the r 2 and r 1 values are 2.31±0.15 and 0.52±0.06 correspondingly.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1998年第6期57-60,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金
广东省科学基金
关键词
引发体系
蒎烯
苯乙烯
共聚合
阳离子聚合
SOCl 2/TiCl 4 initiating system
α pinene/styrene
cationic copolymerization monomer reactivity ratio
