کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1986345 1540250 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of poly(ɛ-caprolactone-co-l-lactide) on thermal and functional properties of poly(l-lactide)
ترجمه فارسی عنوان
اثر پلی (ال-کاپرولاکتون-کول-لاکتید) بر خواص حرارتی و عملکرد پلی (ال-لاکتید)
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
چکیده انگلیسی

A blend of poly(l-lactide) (PLLA) with star-shaped poly(ɛ-caprolactone-co-l-lactide) (s-PCLA) at different contents (PLLA/s-PCLA = 100/0, 90/10, 80/20, and 70/30, w/w) were prepared by torque rheometer. Thermal and functional properties of the blends were investigated by FTIR, SEM, DSC, TGA, DMA, tensile, optical, and water vapor permeability tests. FTIR results showed that intermolecular hydrogen bonds existed between two components in the blends. SEM indicated that PLLA and s-PCLA showed limited miscibility. DSC showed that Tg occurred at lower temperatures in the PLLA/s-PCLA blends than in neat PLLA, and the crystallinity of PLLA phase increased by the presence of s-PCLA in the PLLA/s-PCLA blends. TGA indicated that s-PCLA improved the thermal stability of the PLLA/s-PCLA blends. DMA results revealed that the storage modulus of the composites decreased with respect to the pure polymer. The result of tensile tests suggested that the PLLA/s-PCLA blends showed better elongation at break than neat PLLA. The effect of s-PCLA on the color and opacity of films could be considered as negligible. The WVP of PLLA/s-PCLA blend films increased with the increase in s-PCLA, and they were still lower than that of commercial LDPE films.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 70, September 2014, Pages 327–333
نویسندگان
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