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Banded spherulites of electrospun poly(trimethylene terephthalate)/carbon nanotube composite mats
作者:Wu, Defeng,Yang, Tao,Sun, Yurong,Shi, Tiejun,Zhou, Weidong,Zhang, Ming
關鍵字:poly(trimethylene terephthalate), carbon nanotubes, composites, electrospinning, banded spherulites
論文來源:期刊
具體來源:Polymer International
發表時間:2011年
The crystallization of poly(trimethylene terephthalate) (PTT) composites containing carbon nanotubes (CNTs) were studied in this work. The electrospinning technology was employed successfully to fabricate thin film samples with well-embedded CNTs for spherulite observations using atom force microscopy. The results show that the composites present a higher overall crystallization rate than that of the neat PTT due to the nucleation effect of the CNTs. Banded spherulites can be observed on both the neat PTT and the composites. The presence of CNTs does not change the twisting mode of PTT crystal, but reduces band spacing and twist period. This is attributed to the enhanced fold staggering level of lamellae caused by the narrowed lamellae size and accelerated spherulite growth, which is further confirmed by analysis through secondary nucleation theory. Copyright © 2011 Society of Chemical Industry.
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