Mechanical and fracture properties of hyperbranched polymer covalent functionalized multiwalled carbon nanotube-reinforced epoxy composites

被引：33

作者：

Wang, Lulu ^{[1
]}

Tan, Yefa ^{[1
]}

Wang, Xiaolong ^{[1
]}

Xu, Ting ^{[1
]}

Xiao, Chufan ^{[1
]}

Qi, Zehao ^{[1
]}

机构：

[1] PLA Army Engn Univ, Coll Field Engn, Nanjing 210007, Jiangsu, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2018年 / 706卷

关键词：

Epoxy composites; HTDE; MWCNTs; Mechanical properties; IFSS; Toughening mechanism; SONICATION; NANOCOMPOSITES; RESIN; LOAD;

D O I：

10.1016/j.cplett.2018.05.071

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using a covalent functionalization strategy, hyperbranched poly (trimellitic anhydride-diethylene glycol) ester epoxy resin (HTDE) was grafted on multiwalled carbon nanotubes (MWCNTs). Then the HTDE grafted MWCNTs (HTDE-g-MWCNTs) were used as toughener to prepare epoxy composites (HTDE-gMWCNT/ EP). The results show that the HTDE-g-MWCNTs are homogeneously dispersed in the epoxy matrix and the tensile strength and fracture toughness of HTDE-g-MWCNT/EP composites are enhanced. The property improvements are due to the enhanced interfacial shear stress and relieved internal residual stress. The main toughening mechanisms are pull-out, breakage of HTDE-g-MWCNTs, and their bridging effect to crack, and shear failure of epoxy matrix around HTDE-g-MWCNTs. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：31 / 39

页数：9

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