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Application of block copolymeric surface modifier with crosslinkable units for montmorillonite nanocomposites
Author(s) -
Uyen Nguyen Thai Ngoc,
Joo Sang Il,
Kim Won Ho,
Oh Myung Hwan,
Lee Jonghwi,
Lim Bum Soon,
Hong Sung Chul
Publication year - 2012
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.37856
Subject(s) - materials science , copolymer , montmorillonite , nanocomposite , composite material , methacrylate , methyl methacrylate , bifunctional , polymerization , polymer chemistry , polymer , chemistry , organic chemistry , catalysis
Montmorillonite (MMT) of which the surface was modified with a block copolymer with crosslinkable units was incorporated into methacrylate‐based composites as nanofiller to improve dimensional and mechanical properties. A bifunctional block copolymer containing 2‐isocyanato ethyl methacrylate in one block and poly(vinyl pyridine) units in the other block was prepared as the block copolymeric surface modifier for MMT through controlled/“living” radical polymerization technique. Application of the modified MMT in 2,2‐bis[4‐(2‐hydroxy‐3‐methacryloyl‐oxy)phenyl]propane (bis‐GMA) based composites showed that polymerization shrinkages of the composites decreased as the content of modified MMT increased. Compressive and flexural strengths of the composites were also improved in the presence of the modified MMT, which demonstrate the beneficial effect of the modified MMT as a nanofiller and IEM as a cocrosslinkable unit. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013