Effects of free organic groups in carbon nanotubes on glass transition temperature of epoxy matrix composites

被引：28
作者：
Jiang, Cai [1 ]
Zhang, Jianwei [1 ]
Lin, Shaofeng [1 ]
Ju, Su [1 ]
Jiang, Dazhi [1 ]
机构：
[1] Natl Univ Def Technol, Coll Aerosp Sci & Engn, Dept Mat Sci & Engn, Changsha 410073, Hunan, Peoples R China
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2015年 / 118卷
基金：
中国国家自然科学基金;
关键词：
Carbon nanotubes; Polymer-matrix composites; Thermal properties; Interphase; Modeling; Organic groups; CROSS-LINKED EPOXY; MOLECULAR-DYNAMICS SIMULATION; INTERFACIAL CHARACTERISTICS; REINFORCED COMPOSITES; ELECTRICAL-PROPERTIES; NANOCOMPOSITES ROLE; SURFACTANT; FUNCTIONALIZATION; POLYMERS; BEHAVIOR;
D O I：
10.1016/j.compscitech.2015.09.008
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Molecular dynamics (MD) simulation and differential scanning calorimetric (DSC) test for epoxy resin composites embedded with carbon nanotubes (CNTs) were conducted to study effects of free organic groups in the CNTs on glass transition temperature (T-g) of the composites. Three types of CNTs including pristine, with hydroxyl (-OH) groups and carboxyl (-COOH) groups, respectively, were involved in the investigation. Both simulation and experimental results showed that T(g)s of the CNT/epoxy composites are higher than that of the neat epoxy, T(g)s of the composites randomly embedded with functionalized CNTs were lower than that with pristine CNTs, and T-g of the composites embedded with COOH-CNTs was much lower than that with OH-CNTs. This was attributed to the weaker interactions between the embedded functionalized CNTs and the polymer matrix, due to the further distances and larger interspace around the CNTs caused by free OH or COOH groups in the CNTs. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：269 / 275
页数：7
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