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The role of a biobased epoxy monomer in the preparation of diglycidyl ether of bisphenol A/MWCNT composites
Author(s) -
Cao Lijun,
Liu Xiaoqing,
Li Chao,
Dai Jingyue,
Zhu Jin
Publication year - 2017
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.23732
Subject(s) - materials science , epoxy , composite material , ultimate tensile strength , flexural strength , diglycidyl ether , curing (chemistry) , flexural modulus , monomer , izod impact strength test , scanning electron microscope , dynamic mechanical analysis , carbon nanotube , heat deflection temperature , polymer , bisphenol a
A biobased epoxy monomer (GA‐II) derived from gallic acid for multiwalls carbon nanotubes’ (MWCNTs) dispersion improvement is reported in this article. The aromatic group in its molecular structure made it to be absorbed onto the surface of MWCNTs via π‐π interactions and the GA‐II anchored MWCNT could be homogeneously dispersed in DGEBA matrix via sonication. That was proved by Raman and UV spectroscopy as well as scanning electron microscope. After curing reaction, the epoxy/MWCNT composites demonstrated enhanced mechanical properties, excellent thermal conductivity, and high electrical conductivity. With the addition of only 0.5 wt% GA‐II modified MWCNT, the tensile strength, tensile modulus, flexural strength, and flexural modulus of the composites were improved by 28%, 40%, 22%, and 16%, respectively. The thermal and electrical conductivities were also improved from 0.15 to 0.25 W/m K (67% increased) and from 0.7 × 10 −14 to 0.24 × 10 −4 S cm −1 (10 orders increased). POLYM. COMPOS., 38:1640–1645, 2017. © 2015 Society of Plastics Engineers