Effects of carbon nanofibers on the crystallization kinetics of polyethylene oxide
Effects of carbon nanofibers on the crystallization kinetics of polyethylene oxide
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DOI：
10.1007/s10965-010-9484-3
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发表时间：
2011-09
影响因子：
2.8
通讯作者：
A. Adhikari;K. Lozano
中科院分区：
文献类型：
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作者：
A. Adhikari;K. Lozano
采用差示扫描量热法（DSC）研究了聚氧化乙烯（PEO）和碳纳米管（CNF）填充PEO体系在非等温条件下的结晶行为。用扫描电镜研究了复合材料中CNF的分散和分布。研究表明CNF在PEO中均匀分离。不同的结晶动力学模型被用来研究晶体成核的填料含量的依赖性。修正的Avrami分析表明，PEO在从初级结晶向二级结晶转变的过程中，经历了从三维结晶向一维结晶的转变。PEO的结晶动力学反转CNF负载高于1重量%的PEO。基于改性的Avrami和Avrami和小泽的组合方法，得出的结论是，CNF延缓PEO的结晶在所有CNF负载下的研究。
Differential scanning calorimetry (DSC) was used to investigate the crystallization behavior of polyethylene oxide (PEO) and carbon nanofiber (CNF) filled PEO systems under non-isothermal experimental conditions. The dispersion and distribution of CNF of the composites were studied using scanning electron microscopy. Studies showed the uniform segregation of CNFs in PEO. Different crystallization kinetic models were used to study the dependence of crystal nucleation on the filler content. Modified Avrami analysis showed that PEO undergoes change of crystallization from 3-D to 1-D crystal while going from primary to secondary crystallization. The crystallization kinetic of PEO reversed at CNF loading higher than 1 wt% of PEO. Based on modified Avrami and the combined approach of Avrami and Ozawa, it is concluded that the CNF retards the crystallization of PEO at all CNF loading under study.