کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5196567 1381391 1999 13 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Lipase-catalyzed formation of end-functionalized poly(ϵ-caprolactone) by initiation and termination reactions
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Lipase-catalyzed formation of end-functionalized poly(ϵ-caprolactone) by initiation and termination reactions
چکیده انگلیسی
Macromonomers based on end-functionalized poly(ϵ-caprolactone) (EF-PCL) were prepared by different synthetic strategies using Candida antarctica lipase B as the catalyst. The first strategy: an alcohol containing the target end-functionality initiated the ring-opening polymerization of ϵ-caprolactone (ϵ-CL) (initiation reaction). The second strategy: acids and esters containing the target end-functionality were added to prepolymerized ϵ-CL. Consequently acid-terminated PCL was formed (termination reaction). Using the first strategy, 9-decenol-initiated PCL was formed (24 h, 99% conversion of ϵ-CL) with an average Mw of 1980 D. From the second strategy, linoleic acid-terminated PCL was formed with an average Mw of 2400 D (51 h, 99% conversion). The last strategies: initiation and termination was combined either by using a di-functionalized ester or by addition, in sequence, of initiator and terminator. By these di-functionalization strategies, 2-(4-hydroxyphenyl)-ethyl-poly(ϵ-caprolactone)-acrylate, di-EF-PCL was synthesized with an average Mw of 1960 D (52 h, 60°C) and 1720 D (30 h, 60°C), respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 40, Issue 24, November 1999, Pages 6709-6721
نویسندگان
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