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Preparation of poly(methyl methacrylate‐ co ‐butyl methacrylate) nanoparticles and their reinforcing effect on natural rubber
Author(s) -
Liu Jin,
Tian Xiaohui,
Sun Jinyu,
Yuan Yizhong
Publication year - 2016
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.43843
Subject(s) - materials science , methyl methacrylate , methacrylate , emulsion polymerization , ultimate tensile strength , natural rubber , copolymer , polymer chemistry , nanoparticle , fourier transform infrared spectroscopy , scanning electron microscope , transmission electron microscopy , chemical engineering , nanocomposite , nuclear chemistry , polymer , composite material , chemistry , nanotechnology , engineering
Poly(methyl methacrylate‐ co ‐butyl methacrylate) [P(MMA‐ co ‐BMA)] nanoparticles were synthesized via emulsion polymerization, and incorporated into natural rubber (NR) by latex compounding. Monodispersed, core‐shell P(MMA‐ co ‐BMA)/casein nanoparticles (abbreviated as PMBMA‐CA) were produced with casein (CA) as surfactant. The chemical structure of P(MMA‐ co ‐BMA) copolymers were confirmed by 1 H‐NMR and FTIR analyses. Transmission electron microscopy demonstrated the core–shell structure of PMBMA‐CA, and PMBMA‐CA homogenously distributed around NR particles, indicating the interaction between PMBMA‐CA and NR. As a result, the tensile strength and modulus of NR/PMBMA‐CA films were significantly enhanced. The tensile strength was increased by 100% with 10% copolymer addition, when the molar ratio of MMA:BMA was 8:2. In addition, scanning electron microscopy and atomic force microscopy results presented that the NR/PMBMA‐CA films exhibited smooth surfaces with low roughness, and PMBMA‐CA was compatible with NR. FTIR‐ATR analyses also suggested fewer PMBMA‐CA nanoparticles migrated out of NR. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43843.