کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5204877 | 1381974 | 2006 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phosphorus-containing oligoamides obtained by a novel one-pot degradation of polyamide-6
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper describes a novel strategy for the recycling of polyamide materials and their transformation into functional reactive oligomers with new properties. The method is illustrated by the heating of polyamide-6 (20,000Â Da) in the presence of diesters of the phosphonic acid, (RO)2P(O)H, where R could be -CH3, -C2H5 or -C6H5. It is found that the reaction proceeds in several parallel processes: (i) phosphorylation of the amide group by the alkyl esters of the phosphonic acids and (ii) degradation of the main chain through an exchange reaction between the amide and phosphonic acid ester groups. Alternatively the depolymerization could be induced via a radical reaction with the participation of the polyamide moieties and the P-H group. The proceeding of the abovementioned reactions and the structure of the phosphorus-containing oligoamides are confirmed by 31P, 1H and 13C NMR spectroscopy. Their molecular weights are determined by size exclusion chromatography.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 91, Issue 4, April 2006, Pages 778-788
Journal: Polymer Degradation and Stability - Volume 91, Issue 4, April 2006, Pages 778-788
نویسندگان
K. Troev, N. Todorova, V. Mitova, St. Vassileva, I. Gitsov,