کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9560346 | 1381979 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Studies on the enzymatic hydrolysis of polyesters. II. Aliphatic-aromatic copolyesters
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Studies on the enzymatic hydrolysis of polyesters. II. Aliphatic-aromatic copolyesters Studies on the enzymatic hydrolysis of polyesters. II. Aliphatic-aromatic copolyesters](/preview/png/9560346.png)
چکیده انگلیسی
It could clearly be proven that the selectivity of the lipase concerning the aliphatic or aromatic environment near the ester bonds is not the predominant factor controlling the biodegradability of the copolyesters. As already described for aliphatic homo polyesters the biodegradation rate of the copolyesters is mainly controlled by the chain mobility of the polymers, being correlated with the difference between the melting point of the polyester and the degradation temperature. The presence of longer aliphatic domains, e.g., in block copolyesters does not facilitate the hydrolytic attack by the lipase, but longer aromatic sequences, which control the melting point of the crystalline regions, reduce the biodegradation rate. The concept of chain mobility seems to be a quite universal way to describe and predict the biodegradation rate of synthetic polyesters, independent on their composition or micro-structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 88, Issue 3, June 2005, Pages 371-381
Journal: Polymer Degradation and Stability - Volume 88, Issue 3, June 2005, Pages 371-381
نویسندگان
Elke Marten, Rolf-Joachim Müller, Wolf-Dieter Deckwer,