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

被引：32
|
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
收藏
页码：31 / 39
页数：9
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