On depression of glass transition temperature of epoxy nanocomposites

Gang Liu; Hui Zhang; Dai Jun Zhang; Zhong Zhang; Xue Feng An; Xiao Su Yi

doi:10.1007/s10853-012-6633-6

On depression of glass transition temperature of epoxy nanocomposites

Gang Liu, Hui Zhang, Dai Jun Zhang, Zhong Zhang, Xue Feng An, Xiao Su Yi

Research output: Journal Publication › Article › peer-review

27 Citations (Scopus)

Abstract

Epoxy composite materials filled with nanoalumina 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 °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.

Original language	English
Pages (from-to)	6891-6895
Number of pages	5
Journal	Journal of Materials Science
Volume	47
Issue number	19
DOIs	https://doi.org/10.1007/s10853-012-6633-6
Publication status	Published - Oct 2012
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1007/s10853-012-6633-6

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title = "On depression of glass transition temperature of epoxy nanocomposites",

abstract = "Epoxy composite materials filled with nanoalumina 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 °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.",

author = "Gang Liu and Hui Zhang and Zhang, {Dai Jun} and Zhong Zhang and An, {Xue Feng} and Yi, {Xiao Su}",

note = "Funding Information: Acknowledgements The authors would like to thank the National Basic Research Program of China (973 Program, Grant No. 2010CB631101) for financial support.",

year = "2012",

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doi = "10.1007/s10853-012-6633-6",

language = "English",

volume = "47",

pages = "6891--6895",

journal = "Journal of Materials Science",

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T1 - On depression of glass transition temperature of epoxy nanocomposites

AU - Liu, Gang

AU - Zhang, Hui

AU - Zhang, Dai Jun

AU - Zhang, Zhong

AU - An, Xue Feng

AU - Yi, Xiao Su

N1 - Funding Information: Acknowledgements The authors would like to thank the National Basic Research Program of China (973 Program, Grant No. 2010CB631101) for financial support.

PY - 2012/10

Y1 - 2012/10

N2 - Epoxy composite materials filled with nanoalumina 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 °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.

AB - Epoxy composite materials filled with nanoalumina 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 °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.

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DO - 10.1007/s10853-012-6633-6

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SP - 6891

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JO - Journal of Materials Science

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On depression of glass transition temperature of epoxy nanocomposites

Abstract

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