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The effects of polymer‐nanofiller interactions on the dynamical mechanical properties of PMMA/CaCO 3 composites prepared by microemulsion template
Author(s) -
Qiang Xi,
Chunfang Zhao,
JianZun Yuan,
Yuan Cheng Shi
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.13441
Subject(s) - nanocomposite , materials science , nanoparticle , microemulsion , polymer , methyl methacrylate , dynamic mechanical analysis , poly(methyl methacrylate) , chemical engineering , methacrylate , monomer , polymerization , polymer nanocomposite , phase (matter) , composite material , polymer chemistry , nanotechnology , chemistry , organic chemistry , pulmonary surfactant , engineering
We prepared novel poly(methyl methacrylate) (PMMA)/CaCO 3 nanocomposites by using reverse micelle as a template. The nanoparticles of CaCO 3 were prepared by the reverse microemulsion with functional monomer, methyl methacrylate (MMA) as oily phase, and the PMMA/CaCO 3 nanocomposite was obtained via polymerization of MMA monomer. The SEM image showed that the nanoparticles of CaCO 3 were dispersed in the polymer matrix. Dynamic mechanical analysis (DMTA) was performed to investigate the interaction between the nanoparticles and the polymer chains. In the low‐temperature ripening process, two tan δ peaks were observed in the nanocomposite, corresponding to the glass transitions of the matrix and the interface layer. In the high‐temperature ripening process, only one tan δ peak was observed, suggesting that the interface layer forms a continuous phase. The nanoparticles behave as a physical crosslinker in the interface layer. Modification of the surface of nanoparticles with polyacrylamide and poly( N , N ′‐methylenedisacrylamide) in the nanocomposite did not show an appreciable effect on the interaction of nanoparticles with the matrix. Upon removal of the aqueous phase around the nanoparticles, we obtained surface‐capped nanoparticles by using an improved reverse microemulsion technique. Another PMMA/CaCO 3 nanocomposite was also obtained with these modified nanoparticles. DMTA analysis of this nanocomposite demonstrated that the aqueous phase layer around the nanoparticles does not significantly affect the interaction between the nanoparticles and the polymer chains. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 2739–2749, 2004