The effect of carbon nanofiber on the thermo‐physical behavior of polyethylene oxide
The effect of carbon nanofiber on the thermo‐physical behavior of polyethylene oxide
复制标题
碳纳米纤维对聚环氧乙烷热物理行为的影响
DOI：
10.1002/app.33542
复制
发表时间：
2011
影响因子：
3
通讯作者：
J. Qualls
中科院分区：
文献类型：
--
作者：
A. Adhikari;K. Lozano;M. Chipara;J. Qualls
采用先溶液混合后熔融混合的方法制备了碳纳米管（CNF）填充聚氧化乙烯（PEO）复合材料。通过扫描电子显微镜、差示扫描量热法、热重分析和动态力学分析对这些复合材料和原始聚环氧乙烷的形态学和热物理性能进行了分析。结晶动力学数据在Avrami近似下分析了结晶的初级玛丽。观察到CNF对PEO结晶温度依赖性的影响以及在较高结晶温度下形成三维微晶的趋势。利用Lauritzen-Hoffman成核理论研究了CNFs在PEO中的成核特性。计算了结晶活化能，结果与Lauritzen-霍夫曼理论一致.热重分析和动态力学分析表明，由于负载CNF和形成聚合物-碳纳米管界面，聚合物基体的热稳定性和储能模量逐渐增加。Wiley Periodicals，Inc. J Appl Polym Sci 120：3574- 3580，2011
Composites of polyethylene oxide (PEO) filled with carbon nanofiber (CNF) were prepared using solution mixing followed by melt mixing. The morpho- logy and thermophysical properties of these composites and of pristine polyethylene oxide were analyzed by scanning electron microscopy, differential scanning calo- rimetry, thermogravimetric analysis, and dynamical mechanical analysis. Crystallization kinetic data were an- alyzed within the Avrami approximation for the pri- mary stage of crystallization. The influence of CNF on the temperature dependence crystallization of PEO and the tendency of forming three-dimensional crystallites at higher crystallization temperature were observed. The nucleation features of CNFs dispersed within PEO were investigated by using Lauritzen-Hoffman nucleation theory. Crystallization activation energies were also com- puted; the results are in agreement with the Lauritzen- Hoffman theory. Thermogravimetric analysis and dyna- mical mechanical analysis showed a gradual increase of the thermal stability and of the storage modulus of the polymeric matrix due to the loading with CNFs and formation of a polymer-carbon nanofiber interface. V C 2011 Wiley Periodicals, Inc. J Appl Polym Sci 120: 3574- 3580, 2011