- FREE-RADICAL COPOLYMERIZATION IN THE PRESENCE OF LEWIS-ACIDS .3. ALTERNATING COPOLYMERIZATION OF BUTYL ACRYLATE AND STYRENE IN THE PRESENCE OF AL2ET3CL3 - SOLVENT EFFECT
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- 论文类型： 期刊论文
- 发表时间： 1993-01-01
- 发表刊物： POLYMER INTERNATIONAL
- 收录刊物： SCIE、Scopus
- 卷号： 32
- 期号： 2
- 页面范围： 183-187
- ISSN号： 0959-8103
- 关键字： ALTERNATING COPOLYMERIZATION; SOLVENT EFFECT; MECHANISM; ESR; STYRENE; BUTYL ACRYLATE; LEWIS ACID
- 摘要： Photo-initiated alternating copolymerization of butyl acrylate (BA) and styrene (St) in the presence of AI2Et3Cl3 was investigated in tetrachloroethylene (TCE) and toluene (TOL) solution. The results showed that copolymers with equimolar compositions were obtained over a wide range of reactant composition. The C-13 nuclear magnetic resonance spectrum confirmed their alternating structure. Solvent could greatly affect kinetic behaviour, in TCE solution, the optimum rate of copolymerization was observed near equimolar monomer ratio; while in TOL solution the rate of copolymerization increased rapidly at lower [BA], tended to a constant rate at higher [BA] and increased slightly with increasing [St]. Electron spin resonance spectra indicated that the St radical was the only one to be detected. The effect of solvent as well as Lewis acid on alternating mechanism is also discussed.
