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Adiabatic compressibility of polymer solutions-IV polypropyleneoxide in polar and non-polar solvents

โœ Scribed by W. Bell; R.A. Pethrick

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
331 KB
Volume
11
Category
Article
ISSN
0014-3057

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โœฆ Synopsis

Adiabatic compressibility measurements on solutions of polypropyleneoxides of various molecular weight in polar and non-polar solvents are reported. This study supports the previous observation of an apparent molecular weight dependence of the adiabatic compressibilit} of pol,,-alkyloxides in toluene solution. The variation of the adiabatic compressibiliD with solvent is attributed to changes in polymer structure with variation of solvent. A ~ac NMR study revealed the existence of changes in the sequence structure and distribution of conformations with solvent and molecular weight * Values used in the calculation of the mole fractions. The osmometr', data are considered to bc more reliable than the GPC data at low molecular weights.

"t Note the apparently linear variation with molecular v, eight of the adiabatic compressibihty , , , ,~ ~ , 293

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