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Synthesis of Epoxy and Block Oligomer Modified Clay Nanocomposite

Published online by Cambridge University Press:  15 March 2011

Kang Hung Chen  and
Sze Ming Yang
Kang Hung Chen
Affiliation:
Department of Chemical and Material Engineering, National Central University, Chung-Li, Taiwan 320.
Sze Ming Yang*
Affiliation:
Department of Chemical and Material Engineering, National Central University, Chung-Li, Taiwan 320.
*
To whom all correspondence should be addressed
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Abstract

Acrylic triblock (AxMyBz) and diblock (MyBz) oligomers containing methyl methacrylate (MMA, M), methacrylic acid (MAA, A) and dimethylaminoethyl methacrylate (DMAEMA, B) groups are intercalated into the layers of montmorillonite. The results indicate that the block oligomer lay flatly between the clay layers. ICP analyses of Na+ content indicate no unexchanged sodium ions are left in the intercalated clay.

Nanocomposites of epoxy and clay modified with block oligomers were synthesized. Glass transition temperature (Tg) of the nanocomposite is 129.6°C (M18B2424+ modified clay) compared to 84.1°C for the physical mixture of epoxy and unmodified clay. Tg increases with decreasing amount of modified clay. When modified clay content are below 2 phr, Tg higher than 131.7 °C can be obtained. Water resistance and light transmittance of the nanocomposite is also improved over composite of epoxy and unmodified clay.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 703: Symposia U/V – Nanophase and Nanocomposite Materials IV , 2001 , V13.32
Copyright
Copyright © Materials Research Society 2002

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References

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