Solution Behavior of Poly(n-Isopropylacrylamide) in Water: Effect of Additives |
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| Authors: | Tejas Patel Goutam Ghosh Shin-ichi Yusa Pratap Bahadur |
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| Institution: | 1. Department of Chemistry , Veer Narmad South Gujarat University , Surat, India tejasrp@gmail.com;3. UGC-DAE Consortium for Scientific Research , Trombay, Mumbai, India;4. Department of Materials Science and Chemistry, Graduate School of Engineering , University of Hyogo , Himeji, Hyogo, Japan;5. Department of Chemistry , Veer Narmad South Gujarat University , Surat, India |
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| Abstract: | The effect of different kinds of additives (electrolytes, nonelectrolytes, hydrotropes, and surfactants) on the cloud point (CP) of low molecular weight and narrow dispersed poly(n-isopropylacrylamide) (PNIPAM) synthesized via reversible addition-fragmentation chain transfer (RAFT) controlled radical polymerization was examined. The CP showed a concentration dependent variation and it is greatly modified in the presence of additives. The size of the random polymer coil at 30°C obtained from dynamic light scattering (DLS) measurements is often influenced by the presence of additives. We have explained the effects of different additives on PNIPAM in terms of their interaction with polymer and resultant changes in the coil structure. |
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| Keywords: | Cloud point coil-to-globule transition dynamic light scattering poly(n-isopropylacrylamide) |
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