کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5191444 | 1381232 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Catalysts for the ring-opening polymerization of ε-caprolactone and l-lactide and the mechanistic study
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Two novel magnesium aryloxides have been prepared and their catalytic activities toward ring-opening polymerization (ROP) of ε-caprolactone and l-lactide have been investigated. The reaction of 2,2â²-(2-methoxybenzylidene)-bis(4,6-di(1-methyl-1-phenylethyl)phenol) (MEMPEP-H2) (1) and 2,2â²-methylene-bis(4,6-di(1-methyl-1-phenylethyl)phenol) (MMPEP-H2) with nBu2Mg yield dimeric magnesium complexes [Mg(μ-MEMPEP)(THF)]2 (2) and [Mg(μ-MMPEP)(THF)]2 (3), respectively. Catalytic studies of complexes 2 and 3 illustrate that both 2 and 3 are good catalysts in ε-caprolactone and l-lactide polymerization. Theoretical study of the ROP mechanism of ε-caprolactone catalyzed by 2 demonstrates that the initiator, benzyl alcohol, is activated by the formation of a hydrogen bond with the phenoxy oxygen of MEMPEP2â ligand.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 16, 25 July 2005, Pages 5909-5917
Journal: Polymer - Volume 46, Issue 16, 25 July 2005, Pages 5909-5917
نویسندگان
Te-Liang Yu, Chen-Chang Wu, Chin-Che Chen, Bor-Hunn Huang, Jincai Wu, Chu-Chieh Lin,