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Study of Molecular Interactions of Water- Soluble Polymer at Several Temperatures in Solution | ||
| Baghdad Science Journal | ||
| Article 1, Volume 6, Issue 4, 2009, Pages 757-762 | ||
| Author | ||
| Jawad Kadhim Abaies | ||
| Abstract | ||
| Molecular interactions between 2-isopropenylnaphthalene-methacrylic acid (IPNMA) block copolymer( as a model for water- soluble polymer) and methanol at several temperatures were studied using fluorescence techniques , Fluorescence spectrum for (IPNMA) exhibits two emission bands at around 342 nm and 387 nm corresponding to the monomer and the excimer bands , respectively .The fluorescence spectra of dilute solution of (IPNMA) in methanol were recorded in temperature range of 8- 45˚C . Plot of the excimer to monomer intensity ratio Ie/Im versus temperature was obtained, which shows double lines with positive slopes crossing at 25˚C , the increasing of slope value above this temperature is small which indicates that there is stronger solvation of methanol molecules to polymer coil at temperature below 25˚ C arising from hydrogen bond formation between the polymer and the solvent . | ||
| Keywords | ||
| fluorescence spectroscopy; excimer; molecular interaction; polymer conformation; temperature; dependence | ||
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