کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7782697 | 1500567 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication of (PPC/NCC)/PVA composites with inner-outer double constrained structure and improved glass transition temperature
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Improving glass transition temperature (Tg) and mechanical property of the environment-friendly poly(propylene carbonate) via intermacromolecular complexation through hydrogen bonding is attractive and of great importance. A novel and effective strategy to prepare (polypropylene carbonate/nanocrystalline cellulose)/polyvinyl alcohol ((PPC/NCC)/PVA) composites with inner-outer double constrained structure was reported in this work. Outside the PPC phase, PVA, as a strong skeleton at microscale, could constrain the movement of PPC molecular chains by forming hydrogen bonding with PPC at the interface of PPC and PVA phases; inside the PPC phase, the rod-like NCC could restrain the flexible molecular chains of PPC at nanoscale by forming multi-hydrogen bonding with PPC. Under the synergistic effect of this novel inner-outer double constrained structure, Tg, mechanical properties and thermal stability of (PPC/NCC)/PVA composite were significantly increased, e.g. Tg of the composite researched the maximum value of 49.6â¯Â°C, respectively 15.6â¯Â°C, 5.7â¯Â°C and 4.2â¯Â°C higher than that of PPC, PPC/NCC and PPC/PVA composite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 191, 1 July 2018, Pages 35-43
Journal: Carbohydrate Polymers - Volume 191, 1 July 2018, Pages 35-43
نویسندگان
Shaoying Cui, Li Li, Qi Wang,