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Highly exfoliated epoxy/clay nanocomposites filled with novel cationic fluorinated polyacrylate modified montmorillonite: Morphology and mechanical properties
Author(s) -
Liu Chunhua,
Liu Weiqu,
He Sha,
Jiang Chi,
Xie Yankun,
Yang Maiping,
Shi Hongyi,
Wang Zhengfang
Publication year - 2019
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.25288
Subject(s) - materials science , montmorillonite , nanocomposite , ultimate tensile strength , epoxy , composite material , cationic polymerization , fourier transform infrared spectroscopy , dispersion (optics) , izod impact strength test , chemical engineering , polymer chemistry , physics , optics , engineering
In this investigation, a novel cationic fluorinated polyacrylate modified montmorillonite (CFPA‐MMT) were prepared. WAXRD results showed that the d‐spacing of CFPA‐MMTs expanded with an increase in the feeding amount of CFPA. FTIR spectra and TGA analysis were used to confirm the modification and organic content of CFPA‐MMTs. E51‐CFPA‐MMTs nanocomposites containing different amount of CFPA‐MMTs were fabricated using acetone slurry compounding method. WAXRD patterns in combination with TEM observations presented the intercalated structure of the E51‐0.5CFPA‐MMT‐3 nanocomposite and the intercalated/exfoliated morphologies of E51‐1CFPA‐MMT‐3 and E51‐2CFPA‐MMT‐3 nanocomposites, which revealed that an increase in the CFPA content of CFPA‐MMTs is conducive to form the exfoliated morphology. The SEM images showed that the dispersion zones of MMT platelets separately dispersed in the epoxy matrix at lower filler content (≤1 wt%) whereas connected with each other at higher filler content (≥3 wt%). The separate dispersion zones induced superior improvement in the tensile strength, especially with higher CFPA content. The E51‐2CFPA‐MMT‐1 nanocomposites obtained the largest tensile strength at 69.2 MPa which is an increase of 14.4% compared to that of the neat cured E51. The intercalated and exfoliated MMT platelets increased the storage modulus both in the glassy region and in the rubbery region while decreased the T g of epoxy/clay nanocomposites compared to the neat cured epoxy.