کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1254118 971345 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of azo-incorporated copolymers by C1/N2C1 copolymerization under microwave irradiation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Synthesis of azo-incorporated copolymers by C1/N2C1 copolymerization under microwave irradiation
چکیده انگلیسی

Catalyst-free copolymerization of ethyl diazoacetate (EDA) with carbethoxycarbene (CEC) has been achieved through two approaches: microwave irradiation and enzyme-assisted (Novozyme-435) system. The structure of the copolymer was characterized by MALDI-TOF MS (m/z from 2000 to 2450), which suggested that the main chain of the copolymer consisted of CH(COOEt) and NN–CH(COOEt) frameworks. Fourier transform infrared (FTIR) spectrometry, elemental analysis, and Raman spectrometry proved the incorporation of azo group in the copolymer. The results indicated that the CEC radicals were generated under microwave irradiation (with or without Novozyme-435) from EDA. The mechanism study described that the generation speed of CEC radical was faster than its polymerization, and the excess CEC radicals improved the activity of the N2C1 group, thus inducing some EDA molecules as radicals. The two kinds of radicals co-coupled to result in poly(CEC-co-EDA) through the C1/N2C1 copolymerization, but the homopolymerization of CEC radical occurred quicker than its co-coupling with activated EDA.

Catalyst-free copolymerization of ethyl diazoacetate (EDA) with carbethoxycarbene (CEC) has been achieved through two approaches: microwave irradiation and enzyme-assisted (Novozyme-435) system.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Chemical Letters - Volume 25, Issue 12, December 2014, Pages 1601–1606
نویسندگان
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