State Analysis of Bound Water in Hydrophilic Polymer by High frequency Spectroscopy
نویسندگان
چکیده
منابع مشابه
Behavior of bound water in polyethylene oxide studied by DSC and high-frequency spectroscopy.
Measurements of DSC, NMR and high-frequency spectroscopy have been done on PEO-H2O and PEO-H2O-HQ mixed systems. DSC measurements show that water molecules contained in PEO are divided roughly into two species: freezable water and non-freezable water. By 1H-NMR measurements, PEO and H2O protons show an absorption peak around 3.6 ppm and 4.5 ppm, respectively. All the PEO-H2O samples containing ...
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The bound state of water in PEG (polyethylene glycol)-H(2)O systems was studied by using HFS and DSC methods. Samples with the mixing ratios EO:H(2)O = 1:1 (a) and 1:10 (b), where EO indicates the ethylene oxide units in PEG chain, were heated from frozen state to melt state. Sample (a) gave an HFS peak corresponding to the weakly bound water, while sample (b) gave the peaks of both the bound a...
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Interfacial structures of water at polyvinyl alcohol (PVA) and poly(2-acrylamido-2-methypropane) sulfonic acid sodium salt (PNaAMPS)/quartz interfaces were investigated by sum frequency generation (SFG) spectroscopy. Two broad peaks were observed in OH stretching region at 3200 and 3400 cm(-1), corresponding to the symmetric OH stretching of tetrahedrally coordinated, i.e., strongly hydrogen bo...
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ژورنال
عنوان ژورنال: Transactions of the Materials Research Society of Japan
سال: 2008
ISSN: 1382-3469,2188-1650
DOI: 10.14723/tmrsj.33.1371