Unique nucleation of multi-walled carbon nanotube and poly(ethylene 2,6-naphthalate) nanocomposites during non-isothermal crystallization
Unique nucleation of multi-walled carbon nanotube and poly(ethylene 2,6-naphthalate) nanocomposites during non-isothermal crystallization
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DOI：
10.1016/j.polymer.2005.12.042
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发表时间：
2006-02-08
期刊：
影响因子：
4.6
通讯作者：
Kim, SH
中科院分区：
文献类型：
--
作者：
Kim, JY;Park, HS;Kim, SH
通过熔融共混工艺制备多壁碳纳米管（MWCNT）和聚（2,6-萘二甲酸乙二醇酯）（PEN）纳米复合材料。 PEN/MWCNT 纳米复合材料的非等温结晶行为和动力学对 MWCNT 含量和冷却速率有显着依赖性。 MWCNT的加入加速了PEN的成核和晶体生长机制，并且这种效应在MWCNT含量较低时更加明显。发现 Avrami 和 Ozawa 联合分析可有效描述 PEN/MWCNT 纳米复合材料的非等温结晶。 PEN/MWCNT 纳米复合材料中的 MWCNT 比任何纳米级增强材料表现出更高的成核活性。当添加少量的MWCNT时，结晶活化能较低，然后逐渐增加，并且在MWCNT含量超过1.0 wt%时变得高于纯PEN。 MWCNT 的加入提高了 PEN/MWCNT 纳米复合材料的储能模量和损耗模量。 (c) 2005 Elsevier Ltd. 保留所有权利。
Multi-walled carbon nanotube (MWCNT) and poly(ethylene 2,6-naphthalate) (PEN) nanocomposites are prepared by a melt blending process. There are significant dependence of non-isothermal crystallization behavior and kinetics of PEN/MWCNT nanocomposites on the MWCNT content and cooling rate. The incorporation of MWCNT accelerates the mechanism of nucleation and crystal growth of PEN, and this effect is more pronounced at lower MWCNT content. Combined Avrami and Ozawa analysis is found to be effective in describing the non-isothermal crystallization of the PEN/MWCNT nanocomposites. The MWCNT in the PEN/MWCNT nanocomposites exhibits much higher nucleation activity than any nano-scaled reinforcement. When a vary small quantity of MWCNT was added, the activation energy for crystallization is lower, then gradually increased, and becomes higher than that of pure PEN above 1.0 wt% MWCNT content. The incorporation of MWCNT improves the storage modulus and loss modulus of PEN/MWCNT nanocomposites. (c) 2005 Elsevier Ltd. All rights reserved.