کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1323158 977270 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Norbornene polymerization using multinuclear nickel catalysts based on a polypropyleneimine dendrimer scaffold
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Norbornene polymerization using multinuclear nickel catalysts based on a polypropyleneimine dendrimer scaffold
چکیده انگلیسی

Four multinuclear nickel complexes derived from generation 1 (G1) and generation 2 (G2) dendrimeric salicylaldimine ligands based poly(propyleneimine) dendrimer scaffolds of the type, DAB-(NH2)n (n = 4 or 8, DAB = diaminobutane) were evaluated as catalysts precursors in the polymerization of norbornene, using methylaluminoxane as co-catalyst. All four catalyst evaluated were found to be active for norbornene polymerization giving polymers with moderate to high molecular weights and low polydispersity indices. The polymerization results indicate that there is some sort of dendritic effect, in that the catalyst activity appears to be influenced by the dendrimer generation.

Four novel dendritic salicylaldimine complexes of Ni were evaluated as catalyst precursors in the polymerization of norbornene. The catalysts activated by methylaluminoxane show moderate to high activity producing polynorbornenes with relatively low polydispersity indices.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 693, Issue 13, 15 June 2008, Pages 2279–2286
نویسندگان
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