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Thermodynamics of polymer solutions, especially poly(dimethyl siloxane) solutions
Author(s) -
Panayiotou Constantinos G.
Publication year - 1984
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760241602
Subject(s) - siloxane , materials science , randomness , mixing (physics) , thermodynamics , polymer , natural rubber , volume (thermodynamics) , polymer science , flory–huggins solution theory , polymer chemistry , composite material , mathematics , physics , statistics , quantum mechanics
An improved non‐random free‐volume theory of polymer solutions is presented. It is based on Flory's Equation‐of‐State theory which is modified to account for differences in the size of core volumes of segments in pure liquids and in solution. In addition, it is corrected for non‐randomness through Guggenheim's Quasi‐Chemical approach. The theory is tested against experimental results on heats of mixing, volumes of mixing, and χ interaction parameters of poly (dimethyl siloxane), polyisobutylene and natural rubber solutions with gratifying results. Relations with existing similar theories are discussed.