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Effect of tacticity of poly(methyl methacrylate) on interfacial region with silica in polymer nanocomposite
Author(s) -
Matsuura Kazuki,
Kuboyama Keiichi,
Ougizawa Toshiaki
Publication year - 2021
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.25556
Subject(s) - tacticity , materials science , nanocomposite , methyl methacrylate , silanol , poly(methyl methacrylate) , differential scanning calorimetry , polymer chemistry , polymer , fourier transform infrared spectroscopy , chemical engineering , glass transition , methacrylate , composite material , copolymer , polymerization , organic chemistry , catalysis , chemistry , physics , engineering , thermodynamics
The effect of tacticity on the interfacial region between poly(methyl methacrylate) (PMMA) and silica in a PMMA/silica nanocomposite was investigated by differential scanning calorimetry (DSC), Fourier‐transform infrared spectroscopy (FT‐IR), and X‐ray diffraction (XRD). The glass transition temperature ( T g ) values of the syndiotactic ( st ‐) and atactic ( at ‐) PMMA/silica nanocomposites are higher than those of the neat PMMA. Conversely, the T g of the isotactic ( it ‐) PMMA/silica nanocomposite is slightly higher than that of the neat it ‐PMMA. DSC and XRD results suggest that the restriction of the PMMA chain mobility in the silica nanoparticle interfacial region heightens as the syndiotactic content increases. FT‐IR results show that this phenomenon is caused by the interaction between the carbonyl group of PMMA and the silanol group on the silicon dioxide surface. Therefore, it can be concluded that the syndiotactic‐rich PMMA has a significantly different molecular mobility from that of the neat PMMA in the interfacial region with silica nanoparticle surface than isotactic‐rich PMMA.