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Epoxy Resin Containing Octamaleimidophenyl Polyhedral Oligomeric Silsesquioxane
Author(s) -
Ni Yong,
Zheng Sixun
Publication year - 2005
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200500267
Subject(s) - silsesquioxane , diglycidyl ether , epoxy , materials science , thermogravimetric analysis , polymer chemistry , nanocomposite , glass transition , fourier transform infrared spectroscopy , thermosetting polymer , polymerization , bisphenol a , chemical engineering , polymer , composite material , engineering
Summary: Octamaleimidophenyl polyhedral oligomeric silsesquioxane (OmipPOSS) was synthesized via the imidization reaction between octaaminophenyl polyhedral oligomeric silsesquioxane (OapPOSS) and maleic anhydride, and it was characterized by means of Fourier transform infrared (FTIR) and NMR spectroscopies. OmipPOSS was further employed to prepare epoxy hybrids. The thermosetting hybrids containing OmipPOSS up to 10 wt.‐% were obtained via in situ polymerization of diglycidyl ether of bisphenol A (DGEBA) and 4,4′‐diaminodiphenylmethane (DDM) in the presence of OmipPOSS. High‐resolution transmission electronic microscopy (TEM) indicates that the nanometer‐scaled dispersion of POSS molecules was obtained, suggesting that the nanocomposites were successfully prepared. The results of DSC showed that the glass transition temperatures ( T g 's) of the POSS‐containing nanocomposites are dependent on the content of POSS in the nanocomposites. When the contents of POSS are less than 5 wt.‐%, the nanocomposites displayed the enhanced glass transition temperatures ( T g 's) in comparison with control epoxy. Thermogravimetric analysis (TGA) showed that all the nanocomposites containing POSS displayed improved char yield, suggesting the flame retardance of the materials is improved.