聚(丙烯-co-降冰片烯)具有高摩尔质量,降冰片烯含量和性质可调,在氯乙酰胺修饰的半二茂钛催化剂上产率高

IF 4.1 2区 化学 Q2 POLYMER SCIENCE
Simona Losio, Laura Boggioni, Adriano Vignali, Fabio Bertini, Akito Nishiyama, Kotohiro Nomura, Incoronata Tritto
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引用次数: 0

摘要

氯胺修饰的半二茂钛催化剂Cp ' ticcl2 (N=CtBu2 [Cp ' = C5H5(1), C5Me5 (2), Me3SiC5H4(3)])在MAO存在下可得到高分子量的丙烯(P)与降冰片烯(N)共聚物,并能有效地吸附N。采用13C-NMR谱、摩尔质量、热性能和力学性能对所制得的聚(P-co-N)s的微观结构和单体含量进行了详细研究。与氯胺酮修饰的Cp*TiCl2(N=CtBu2)相比,氯胺酮修饰的Cp*TiCl2(N=CtBu2)催化剂1和3表现出更高的催化活性,得到了更高的N含量和摩尔质量的共聚物(2);催化剂1合成的共聚物含氮量为61.7 mol %,分子量为657 kg mol-1,组成均匀。随着N含量的增加,共聚物的拉伸性能从延性和韧性材料转变为刚性和脆性材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Poly(propene-co-norbornene)s with high molar masses, tunable norbornene contents and properties, in high yield by ketimide-modified half-titanocene catalysts
The ketimide-modified half-titanocene catalysts, Cp’TiCl2(N=CtBu2 [Cp’ = C5H5(1), C5Me5 (2), Me3SiC5H4 (3)], afforded high molecular weight copolymers of propene (P) and norbornene (N) with efficient N incorporation in the presence of MAO. The poly(P-co-N)s obtained were studied in detail by determining microstructure and comonomer contents by 13C-NMR spectra, molar masses, thermal and mechanical properties. The ketimide Cp’TiCl2(N=CtBu2) catalysts 1 and 3 exhibited higher catalytic activities and yielded the copolymers with higher N contents and molar mass than the ketimide-modified Cp*TiCl2(N=CtBu2) (2); the resultant copolymer by catalyst 1 contained 61.7 mol % of N and Mw equal to 657 kg mol-1 possessing uniform composition. The copolymers show very different tensile behaviours passing from ductile and tough materials to stiff and fragile ones as N content increases.
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来源期刊
Polymer Chemistry
Polymer Chemistry POLYMER SCIENCE-
CiteScore
8.60
自引率
8.70%
发文量
535
审稿时长
1.7 months
期刊介绍: Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.
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