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Structural properties of the multiwall carbon nanotubes/poly(methyl methacrylate) nanocomposites: Effect of the multiwall carbon nanotubes covalent functionalization
Author(s) -
Brković Danijela V.,
Pavlović Vladimir B.,
Pavlović Vera P.,
Obradović Nina,
Mitrić Miodrag,
Stevanović Sanja,
Vlahović Branislav,
Uskoković Petar S.,
Marinković Aleksandar D.
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.23996
Subject(s) - materials science , carbon nanotube , nanocomposite , glass transition , composite material , surface modification , polymer , methyl methacrylate , dynamic mechanical analysis , methacrylate , poly(methyl methacrylate) , chemical engineering , polymerization , engineering
The structural characteristics of polymer nanocomposites with functionalized multiwall carbon nanotubes (MWCNTs) in poly(methyl methacrylate) matrix have been studied in relation to nanofiller loading and surface functionality. Different functional groups have been covalently attached on the MWCNTs sidewalls in order to induce interfacial interactions at nanofiller/polymer interface, which resulted in an improved nanomechanical features. Structural properties of nanocomposites, studied with XRD and Raman analysis, indicated the most pronounced decrease in a degree of amorphousness for samples containing 0.5 and 1 wt% of MWCNTs functionalized with dapsone (dapson‐MWCNT) and diethyl malonate (dem‐MWCNT). SEM and TEM micrographs confirmed improved dispersibility of the MWCNTs modified with aromatic structure of dapsone inside PMMA matrix. A significant increase in a glass transition temperature of over 60°C has been found for the 1 wt% dapson‐MWCNT nanocomposite. Additional modification of dapson‐MWCNT by further increasing aromaticity and voluminosity of attached moiety (fid‐MWCNT), showed 30°C increases in a glass transition temperature at 4 wt% of nanofiller loading, which is similar to shift of 37°C with loading of MWCNTs modified with ester terminal group. A maximum increase of 56% of reduced modulus and 86% of hardness was obtained for 1 wt% loading of dapson‐MWCNT nanofiller. POLYM. COMPOS., 38:E472–E489, 2017. © 2016 Society of Plastics Engineers