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Synthesis and Properties of Covalently Bonded Layered Silicates/Polyimide (BTDA-ODA) Nanocomposites

Authors :
Leu, C.-M.
Wu, Z.-W.
Wei, K.-H.
Source :
Chemistry of Materials; July 2002, Vol. 14 Issue: 7 p3016-3021, 6p
Publication Year :
2002

Abstract

Covalently bonded layered silicates/polyimide (BTDA-ODA) nanocomposites have been synthesized from γ-(aminopropyl)triethoxysilane (APTS) grafted kenyaite and poly(amic acid). The existence of covalent bonds between APTS and silicates and between APTS and the dianhydride end groups of the polymer have been confirmed by solid-state <SUP>13</SUP>C and <SUP>29</SUP>Si nuclear magnetic resonance and infrared spectroscopy, respectively. The thermal, mechanical, and moistureabsorption retardation properties of these nanocomposites were found to improve substantially over those of neat BTDA-ODA. In particular, a maximum increase of 36 °C in the degradation temperature and a maximum reduction of 54% in moisture absorption are displayed by these nanocomposites.

Details

Language :
English
ISSN :
08974756
Volume :
14
Issue :
7
Database :
Supplemental Index
Journal :
Chemistry of Materials
Publication Type :
Periodical
Accession number :
ejs2320161
Full Text :
https://doi.org/10.1021/cm0200240