稀土金属苄基配合物高活性催化丙烯腈聚合  

Highly active rare-earth metal benzyl complexes for acrylonitrile polymerization

作　　者：徐森 罗云杰 XU Sen;LUO Yunjie(School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学材料科学与化学工程学院,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2023年第6期64-69,共6页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(21971130).

摘　　要：聚丙烯腈的合成一直是高分子合成和特种高分子材料领域的研究热点.稀土金属苄基配合物(2,5-Me_(2)C_(4)H_(2)CH_(2)CH_(2)NC_(6)H_(5))Ln(CH_(2)C_(6)H_(4)NMe_(2)-o)_(2)(Ln=Sc,La)、(C_(5)Me_(5))Sc(CH_(2)C_(6)H_(4)NMe_(2)-o)_(2)、(2,5-Me_(2)C_(4)H_(2)NSiMe_(2)NC_(6)H_(5))Sc(CH_(2)C_(6)H_(4)NMe_(2)-o)_(2)和Ln(CH_(2)C_(6)H_(4)NMe_(2)-o)_(3)(Ln=Sc,Y,La,Lu)可以作为单组分催化剂引发丙烯腈聚合.通过改变辅助配体、聚合溶剂、金属离子以及聚合温度等条件,探究了稀土金属苄基配合物催化丙烯腈聚合的活性及选择性.结果表明,这些稀土金属配合物对丙烯腈聚合表现出很高的催化活性,得到了高分子量的无规聚丙烯腈.辅助配体、溶剂、聚合温度和中心金属半径对所得聚合物的微观结构没有太大影响.Acrylonitrile polymerization has attracted close attention in academic and industrial arena.Rare-earth metal benzyl complexes(2,5-Me_(2)C_(4)H_(2)CH_(2)CH_(2)NC_(6)H_(5))Ln(CH_(2)C_(6)H_(4)NMe_(2)-o)_(2)(Ln=Sc,La),(C_(5)Me_(5))Sc(CH_(2)C_(6)H_(4)NMe_(2)-o)_(2),(2,5-Me_(2)C_(4)H_(2)NSiMe_(2)NC_(6)H_(5))Sc(CH_(2)C_(6)H_(4)NMe_(2)-o)_(2),and Ln(CH_(2)C_(6)H_(4)NMe_(2)-o)_(3)(Ln=Sc,Y,La,Lu)can act as mono-component initiators for acrylonitrile polymerization.The catalytic activity and selectivity of rare-earth metal benzyl complexes for acrylonitrile polymerization are investigated by changing the auxiliary ligand,polymerization solvent,metal ion and polymerization temperature.The experimental results indicate that these rare-earth metal complexes reveal strong activities for acrylonitrile polymerization,and produce atactic polyacrylonitrile with large molecular weights.Ancillary ligand,polymerization solvent,rare-earth metal size and polymerization temperature hardly have effect on the micro-structures of the resulting polymers.

关 键 词：稀土金属配合物 丙烯腈 聚合 

分 类 号：O63-0[理学—高分子化学]