کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5186887 1381115 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Aromatic disulfide polymers back to macrocyclic disulfide oligomers via cyclo-depolymerization reaction
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Aromatic disulfide polymers back to macrocyclic disulfide oligomers via cyclo-depolymerization reaction
چکیده انگلیسی

A brand new and highly efficient method has been developed for the synthesis of aromatic macrocyclic disulfide oligomers. Cyclization was achieved by cyclo-depolymerization (CDP) of aromatic disulfide polymer in the presence of catalytic amount of thiols and weak base. The cyclic oligomers undergo a facile free-radical ring-opening polymerization to form high molecular weight polymer. Comparing with the conventional method for the preparation of macrocyclic aromatic oligomers by catalytic oxidation of dithiols, highly dilute condition was not necessary using the new method. The macrocyclics in high yield and with narrow molecular weight distribution were obtained. This method also provides a convenient technology for the recycle of aromatic disulfide polymers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 24, 21 November 2005, Pages 11117-11124
نویسندگان
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