期刊
POLYMER
卷 49, 期 22, 页码 4796-4801出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2008.08.062
关键词
Epoxy; Layered double hydroxides; Nanocomposite
资金
- National Science Council (NSC) of Taiwan
- Ministry of Economic Affairs, Taiwan
An anionic clay, magnesium-aluminum layered double hydroxide (Mg2Al-NO3-LDH), was prepared by a co-precipitation method and intercalated with poly(oxypropylene)-amindocarboxylic acid (POP-amido acid). Depending on the POP-intercalating agents with molecular weight at 2000 or 400 g/mol, the intercalated LDHs were analyzed to have d spacing of 6.8 or 2.7 nm and organic incorporation of 80 and 55 wt%, respectively. Two comparative POP/LDH hybrids were allowed to initiate the self-polymerization of the epoxy resin, diglycidyl ether of bisphenol-A (DGEBA). The curing rate was significantly increased by using the hybrids as initiators for epoxy curing, demonstrated by DSC thermal analysis that the exothermic peak shifted from 182 to 152 degrees C by increasing organoclay addition. The resultant nanocomposites prepared from the anionic LDH initiated epoxy self-polymerization have the improved thermal and physical properties, evidenced by TGA, XRD, TEM, and SEM analyses. (C) 2008 Elsevier Ltd. All rights reserved.
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