Nano Archive

On depression of glass transition temperature of epoxy nanocomposites

Liu, Gang and Zhang, Hui and Zhang , Dai-jun and Zhang, Hui and Zhang, Zhong and An, Xue-feng (2012) On depression of glass transition temperature of epoxy nanocomposites. springerlink, 47 (19). pp. 6891-6895. ISSN 0022-2461

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Official URL: http://www.springerlink.com/content/185282w13l7126...

Abstract

Epoxy composite materials filled with nano-alumina particles were prepared by mechanical mixing techniques. The glass transition temperatures (T (g)) of the nanocomposites were found to decline significantly with the increasing filler content. After the addition of 30-phr nanoparticles, the T (g) of the filled sample decreased by as high as 55 A degrees C, as compared with that of the neat epoxy polymer. Based on the selective adsorption hypothesis and the molecular diffusion, it is speculated that the hardener molecules were unevenly distributed in the nanocomposites, which caused imbalanced stoichiometry between the epoxy and the hardener and finally decreased the T (g). Some results that may support the adsorption hypothesis were given and discussed.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Analytical Science > Nanotechnology for sensing and actuating
Material Science > Bio materials
Analytical Science > Beam methods
ID Code:11916
Deposited By:CSMNT
Deposited On:11 Sep 2012 16:41
Last Modified:11 Sep 2012 16:41

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