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Preparation and properties of polycarbonate nanocomposites using attapulgite grafted poly(methyl methacrylate) as a potential nanofiller
Author(s) -
Xu Hang,
Yang Haicun,
Zhang Liu,
Ni Qingting,
Gong Fanghong
Publication year - 2015
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.42262
Subject(s) - materials science , thermogravimetric analysis , nanocomposite , polycarbonate , thermal stability , fourier transform infrared spectroscopy , poly(methyl methacrylate) , ultimate tensile strength , composite material , methyl methacrylate , polymerization , chemical engineering , polymer chemistry , polymer , engineering
The Core‐shell hybrid particles with attapulgite (ATP) as the core and polymethylmethacrylate (PMMA) as the shell (ATP‐ g ‐PMMA) were prepared via reversible addition‐fragmentation chain transfer (RAFT) polymerization method. The diameter of ATP‐ g ‐PMMA was increased to 50–60 nm, and the surface hygroscopicity was decreased observably after surface grafting. Then, ATP‐ g ‐PMMA hybrid particles were filled into the polycarbonate (PC) by melt mixing to afford nanocomposites, and the mechanical properties, microstructures, thermal stability, and rheological behavior of nanocomposites were investigated by varying ATP‐ g ‐PMMA concentration in the range 1, 3, 5, and 7 wt % in PC. Fourier Transform infrared spectroscopy (FTIR) suggested that there is no esterification reaction between particles and matrix. Slight changes in tensile strength, and noticeable decrease of elongation and impact strength were observed with the increase in ATP‐ g ‐PMMA particles loading. The morphology evaluated by field‐emission scanning electron microscopy (FESEM) indicated that ATP‐ g ‐PMMA was dispersed with a diameter range of 80–100 nm, and phase separation was appeared with increasing ATP‐ g ‐PMMA loadings. Thermogravimetric analysis (TGA) results revealed the thermal stability of composites was strengthened. The disentanglement and interface slip induced by preferred orientation and directional arrangement of ATP‐ g ‐PMMA resulted in lower complex viscosity (η*) and higher loss factor (tan δ) compared with the pristine PC. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42262.