期刊
LANGMUIR
卷 26, 期 23, 页码 17781-17784出版社
AMER CHEMICAL SOC
DOI: 10.1021/la1024229
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资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- National Institute of Environmental Science (NIES)
- Ministry of Environment, Japan
- Japan Society for Promotion of Science (JSPS) for Young Scientists
In this study, stereocontrolled poly(N-isopropylacrylamide) (PIPAAm) brushes were grafted from surfaces by atom transfer radical polymerization (ATRP) in the presence of a Lewis acid, and the effect of PIPAAm brash tacticity on the thermoresponsive wettabiliy was investigated. PIPAAm grafted by ATRP in the presence of Y(OTf)(3) showed high isotacticity, while the control brush polymerized in the absence of Y(OTf)(3) was clearly atactic. The isotacticity and molecular weight of PIPAAm brushes were controlled by polymerization conditions. The wettability of isotactic PIPAAm-grafted surfaces decreased slightly below 10 degrees C, although the phase transition temperature of atactic surface was 30 degrees C, and the bulk isotactic polymer was water-insoluble between 5 and 45 degrees C.
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