摘要
用三(2,6-二叔丁基-4-甲基-苯氧基)镧[La(OAr)3]在-15℃引发ε-己内酯(CL)的开环聚合,发现聚合体系具有活性聚合特征.在第二步聚合过程中继续补加第二种单体三亚甲基环碳酸酯(TMC)或二甲基三亚甲基环碳酸酯(DTC),可得到CL与环碳酸酯的嵌段共聚物.
The polymerization characteristics of ε-caprolactone（CL） with lanthanum tris （2,6-di-tert-butyl-4- methylphenolate） at a low temperature was reported. The polymerization system shows some living character below - 10℃. That is the length of polymer chain increases with the increase of the molar ratio of monomer to initiator or polymerization time. The block copolymers of CL and cyclic carbonate （ TMC or DTC） were prepared after CL had been polymerized for a period at a low temperature and were characterized by GPC, DSC and I H NMR.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第2期356-359,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学重点基金(批准号:20434020)
国家'九七三'计划项目(批准号:2005CB623802)资助
关键词
Ε-己内酯
稀土催化剂
环碳酸酯
开环聚合
ε-Caprolactone
Rare earth catalyst
Cyclic carbonate
Ring-opening polymerization
