کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10425052 | 906709 | 2012 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of molecular chain polarity on electric field-induced aligned conductive carbon nanotube network formation in polymer melt
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The effect of molecular chain polarity on electric field-induced aligned conductive carbon nanotube network formation in polymer melt The effect of molecular chain polarity on electric field-induced aligned conductive carbon nanotube network formation in polymer melt](/preview/png/10425052.png)
چکیده انگلیسی
Two ethylene-vinyl acetate (EVA) copolymers containing 10 and 25Â wt.% vinyl acetate (EVA10 and EVA25) were utilized to explore the effect of molecular polarity on the formation of conductive carbon nanotube (CNT) network in EVA melt under an electric field. Because of the different interfacial energy, it was supposed to be stronger molecular chain-CNT interaction in CNT/EVA25 than that in CNT/EVA10. The critical time for conductive CNT network formation decreased with annealing temperature, filler loading and EVA polarity. The activation energy of conductive CNT network formation (93.9Â kJ/mol) in CNT/EVA10 is lower than that (104.7Â kJ/mol) in CNT/EVA25. By a thermodynamic percolation model, the percolation threshold at the equilibrium state was about 0.19Â vol.% for CNT/EVA10, while it rose to 0.27Â vol.% for CNT/EVA25. Morphological observation showed a high degree of CNT alignment in CNT/EVA10 compared to CNT/EVA25 after application of an electric field. The results suggested the strong CNT-EVA chain interaction and higher viscosity of polymer matrix limited the CNT alignment and the conductive network tended to form easily in EVA melt with a low chain polarity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 72, Issue 15, 12 October 2012, Pages 1875-1881
Journal: Composites Science and Technology - Volume 72, Issue 15, 12 October 2012, Pages 1875-1881
نویسندگان
Yi-Chuan Zhang, Ding Zheng, Huan Pang, Jian-Hua Tang, Zhong-Ming Li,