摘要
通过活性正离子聚合与原子转移自由基聚合(ATRP)转换合成了β-蒎烯与甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、苯乙烯(St)的新型接枝共聚物.首先以α-氯代乙苯/TiCl4/Ti(OiPr)4/nBu4NCl体系引发β-蒎烯活性正离子聚合,合成预定分子量大小和窄分子量分布的聚β-蒎烯,然后经N-溴代琥珀酰亚胺(NBS)定量溴化,得到溴化聚β-蒎烯大分子引发剂(Br/β-蒎烯链节摩尔比为0.5).然后将该大分子引发剂与溴化亚铜(CuBr)/2,2′-联吡啶(bpy)复合,引发MMA、BA、St进行ATRP接枝聚合.接枝反应显示一级动力学特征,且产物的分子量及分子量分布可控,表明上述ATRP接枝聚合反应具有可控聚合特征.接枝产物的结构经1H-NMR分析得到进一步证实.
Graft copolymers ofβ-pinene with methyl methacrylate （MMA）, butyl acrylate （BA） or styrene （St） were synthesized by the combination of living cationic polymerization and atom transfer radical polymerization （ATRP）. β-Pinene polymers with predetermined molecular weights and narrow molecular weight distributions （MWDs） were prepared by living cationic polymerization with the 1-phenylethyl chloride /TiCl4/Ti （OiPr）4/ n Bu4NCl initiating system, and the obtained polymers were brominated quantitatively by N-bromosuccinamide in the presence of AIBN, yielding poly（β-pinene） macroinitiators with 50% of bromine contents （Br/β-pinene unit molar ratio = 0.5）. The macroinitiator, in conjunction with CuBr and 2,2＇-bipyridine, was used to initiate ATRP grafting of BA, MMA and St. All of the grafting polymerizations induced linear first-order kinetic plots and gave graft copolymers with controlled molecular weights and MWDs, suggesting that these polymerizations are controllable. The structures of the obtained graft copolymers ofβ-pinene with （methyl） methacrylate or styrene were confirmed by ^1 H- NMR spectra.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2006年第1期151-155,共5页
Acta Polymerica Sinica
基金
广东省自然科学基金(基金号039184)
国家自然科学基金(基金号20374059)
高等学校博士学科点专项基金(基金号20040558032)资助项目
