کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5189529 1381186 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecular modeling study of the resistance of PLA to hydrolysis based on the blending of PLLA and PDLA
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Molecular modeling study of the resistance of PLA to hydrolysis based on the blending of PLLA and PDLA
چکیده انگلیسی
Molecular modeling has been used to explain how the blending of poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA) affects the resistance of poly(lactide) (PLA) to hydrolysis. Amorphous PLLA/PDLA blends were created using molecular modeling, and the minimum potential energy of the blends before and after hydrolysis were obtained. The 50/50 blend has the greatest resistance to hydrolysis, which agrees with past experiments and is due to its having stronger hydrogen-bonding and dipole-dipole interactions than pure PLLA or PDLA. This is based on the 50/50 blend having more of these interactions and shorter average lengths for the hydrogen-bonds and dipole-dipole interactions compared to pure PLLA and PDLA. Hydrogen-bonding possibly has a greater effect than the dipole-dipole interactions on the resistance to hydrolysis. The change in potential energy for hydrolysis decreases linearly with increasing % PLLA or % PDLA from 0 to 50%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 13, 14 June 2006, Pages 4845-4850
نویسندگان
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