Thermodynamics of polystyrene solutions. I. Interaction parameters and polymer order
作者:
SamuelH. Maron,
CharlesA. Daniels,
期刊:
Journal of Macromolecular Science, Part B
(Taylor Available online 1968)
卷期:
Volume 2,
issue 4
页码: 743-767
ISSN:0022-2348
年代: 1968
DOI:10.1080/00222346808212467
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The Maron theory was used to deduce from mostly osmotic pressure and light-scattering data the interaction parameters as a function of concentration, temperature, and polymer molecular weight for solutions of polystyrene in seven different solvents. These interaction parameters were then utilized to calculate the activity coefficients of the solvent in more concentrated solutions for comparison with experimental values deduced from vapor pressure measurements. When order was absent in the polymers (all cases but two), the agreement between calculated and observed activity coefficients was found to be very good. In the two cases where order was present, the activity coefficients observed in the concentrated solutions were higher than those calculated. These deviations were employed to find the degree of polymer order both in solution and in the original polymers.
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