کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5201898 1502908 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Seawater accelerated ageing of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Seawater accelerated ageing of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
چکیده انگلیسی
The aim of this study is to establish a baseline for poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) lifetime prediction in a marine environment, by means of mechanical and physico-chemical characterization of specimens immersed in continuously renewed and filtered natural seawater in the laboratory at different temperatures (4, 25 and 40 °C). Samples were also aged at sea in Lorient harbour in order to compare laboratory and natural degradation mechanisms and kinetics. Due to its morphology, hydrolysis of PHBV in natural seawater is quite slow, and samples were observed to undergo preferentially an enzymatic surface degradation. Increasing the aging temperature in the laboratory promotes the water uptake and causes hydrolysis. As two degradation mechanisms occur in parallel, the choice of test conditions is critical, and the lifetime of PHBV in a marine environment is difficult to predict accurately.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 105, July 2014, Pages 237-247
نویسندگان
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