کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5205664 1502932 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Material BehaviourThermal degradation behavior of Copoly(propylene carbonate ε-caprolactone) investigated using TG/FTIR and Py-GC/MS methodologies
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Material BehaviourThermal degradation behavior of Copoly(propylene carbonate ε-caprolactone) investigated using TG/FTIR and Py-GC/MS methodologies
چکیده انگلیسی

Thermal degradation behaviors of copoly(propylene carbonate ε-caprolactone)s (PPCCLs) with different ε-caprolactone (CL) contents were studied at various pyrolysis temperatures by the combination of thermogravimetric analysis/Fourier transform infrared spectrometry (TG/FTIR) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) techniques. TGA curves of the copolymers clearly show two stages. The experimental results indicate that the increase of CL content in PPCCL chain leads to an increase of both first and second stage maximum decomposition temperature. The dominant degradation pathway is a backbiting ester interchange reaction involving OH chain ends of PPCCLs, resulting in the formation of cyclic oligomers. In addition, at a relative higher pyrolysis temperature, besides the major products propylene carbonate and caprolactone, some diol and long chain chemicals with ester group were also detected, showing a main intramolecular transesterification accompanied with chain scission decomposition mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 58, April 2017, Pages 13-20
نویسندگان
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