کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5204451 | 1381961 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrolytic degradation of carbohydrate-based polyamides of the AABB type derived from l-arabinose and d-xylose
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The hydrolytic degradation of a series of aregic carbohydrate-based polyamides derived from l-arabinose and d-xylose is described. These polyamides are those that are fully sugar-based (PA-SuSu), those derived from aldaric acids and polyalkylene diamines (PA-mSu), and those derived from diamine sugars and polyalkylene dicarboxylic acids (PA-Sun). Their physical properties and crystal structures depend on their constitution and the configuration of the carbohydrate-based moiety. The feasibility of the hydrolysis of these polyamides was, in general, related with such structural properties. Thus, the fully sugar-based PA-SuSu were amorphous, water-soluble materials, and were hydrolysed in water at 70 °C. PA-mSu were crystalline and more resistant to hydrolysis - they were degraded at pH 2 and 70 °C [Tg(s) 60-90 °C]. PA-Sun were amorphous and highly hygroscopic materials - they were hydrolysed in water at 37 °C [Tg(s) 25-40 °C].
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 93, Issue 7, July 2008, Pages 1370-1375
Journal: Polymer Degradation and Stability - Volume 93, Issue 7, July 2008, Pages 1370-1375
نویسندگان
M. Gracia GarcÃa-MartÃn, Elena Benito Hernández, RocÃo Ruiz Pérez, Juan A. Galbis,