摘要
用 (dibenzoylmethanato) 2 Ti(OPh) 2 [(dbm) 2 Ti(OPh) 2 ]/甲基铝氧烷 (MAO)为代表的新型 β 二酮钛非茂催化剂实现了降冰片烯的聚合 ,得到加成聚合和开环易位聚合的混合物 ,研究了实现高聚合活性所需的特殊条件及所得的聚合物结构 ,主要应用傅立叶转变红外技术 (FTIR)
Norbornene polymerization was first carried out by (dienzoylmethanato)(2) Ti (OPh)(2) [(dbm)(2) Ti (OPh)(2)]/ methylaluminoxane (MAO), a type of beta -diketonate titanium non-metallocene catalytic system. A mixture of vinyl addition polymer and ring-opening metathesis polymer was obtained. Polymer structure was characterized by FTIR. Influence of polymerization temperature, Al/Ti mole ratio, monomer concentration and solvents on polymerization activity as well as on polymer structure was investigated. Higher activity was achieved at 80 degreesC with higher Al/Ti mole ratio and monomer concentration as well as 1,2-dichlorobenzene as the solvent instead of toluene. Higher temperature, higher Al/Ti mole ratio, lower monomer concentration have the advantage of forming more ring-opening polymer structure and less addition polymer structure.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2001年第5期604-607,共4页
Acta Polymerica Sinica
基金
国家自然科学基金 (基金号 2 973414 1)
SINOPEC联合资助重点项目
