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Substituent Effects on a Photo-Induced Alternation of the Lower Critical Solution Temperatures of Poly(N-isopropylacrylamide) with Azobenzene Units

Published online by Cambridge University Press:  17 March 2011

Haruhisa Akiyama  and
Nobuyuki Tamaoki
Haruhisa Akiyama
Affiliation:
Molecular Function Group, Institute for Materials & Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST) Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, JAPAN
Nobuyuki Tamaoki
Affiliation:
Molecular Function Group, Institute for Materials & Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST) Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, JAPAN
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Abstract

We synthesized copolymers of N-isopropylacrylamide (NIPAM) and azobenzene-containing acrylates or acrylamides by free radical polymerization, and investigated the water solubility of these polymers upon irradiation with ultra-violet and visible light. The solubility depended on concentration and structure of photoreactive azobenzene unit in the polymers. The soluble polymers showed the lower critical solution temperature, which was varied along with light irradiation. Photo-induced large wettability alteration was observed in the film.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 710: Symposia DD – Polymer Interfaces and Thin Films , 2001 , DD6.13.1
Copyright
Copyright © Materials Research Society 2002

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References

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