کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7606815 | 1492964 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pyrolysis of of poly(methy methacrylate) copolymers
ترجمه فارسی عنوان
پیلوریس از کوپلیمرهای پلی (متی متاکریلات)
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کلمات کلیدی
پلی (متیل متاکریلات)، کوپلیمرها، تخریب حرارتی، پیرولیز، طیف سنجی جرمی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
In this work, thermal degradation of copolymers of poly(methy methacrylate) namely, poly(methyl methacrylate-co-n-butyl acrylate), P(MMA-co-nBu), poly(methyl methacrylate-co-n-benzyl methacrylate) P(MMA-co-BzMA, and poly(methyl methacrylate-co-isobornyl acrylate), P(MMA-co-IBA) were investigated via direct pyrolysis mass spectrometry. It was determined that whether an available γ-H with respect to the carbonyl groups is present or not determines the thermal degradation mechanisms of polyacrylates and polymethacrylates. Cis elimination reactions become preferential as the first step of thermal decomposition and lead to a multi-step degradation mechanism involving trans-esterification reactions together with elimination of molecules such as alcohols, CO2, CO and H2O if γ-Hs to the carbonyl group is present. On the other hand, if there is no γ-H, thermal degradation proceeds by depolymerization yielding mainly the corresponding monomer. Consequently, PMMA and PBzMA decompose by depolymerization mechanisms and in contrast, thermal degradation of PnBA, and PIBA occurs through various reaction pathways involving random chain scissions, cis-elimination and trans-esterification reactions and elimination of CO2 and CO.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Analytical and Applied Pyrolysis - Volume 113, May 2015, Pages 529-538
Journal: Journal of Analytical and Applied Pyrolysis - Volume 113, May 2015, Pages 529-538
نویسندگان
Suriye Ãzlem-Gundogdu, Evren Aslan Gurel, Jale Hacaloglu,