摘要
采用ｔ－ＢｕＯＡｃ／ＴｉＣｌ４作引发体系，研究了吡啶（ＰＹ）对异丁烯阳离子聚合反应活性的作用。实验结果表明，在本聚合体系中加入吡啶，能控制聚合物的分子量，降低分子量分布，当ＰＹ／ｔ－ＢｕＯＡｃ＝２时，得到ＭＷＤ＝１．２，Ｍｎ＝６７５０的聚合物，Ｃｏｎｖ＝９５％。通过紫外光谱证明了在本聚合体系中生成ＰＹ→ＴｉＣｌ４络合物，ＰＹ→ＴｉＣｌ４络合物对ＰＩＢ增长活性末端作用，并提出了络合作用机理。
The effects of pyridene on the living properties of IB cationic polymerization with t BuOAC/TiCl 4 initiating system were studied. The results show that Pyridine is one of the most effective electron donor(ED) in the respect of narrowing the MWD and controlling n. When PY/t BuOAc=2, the best result is obtained as follow: MWD =1.2, Conv.=95%, n=6750. UV spectroscopy was used to characterize the role of PY→TiCl 4 on the propagating chain end. The complexing mechanism were proposed.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1999年第4期66-68,71,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金
