ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The solvent power of a variety of diluents with polyvinyl chloride was evaluated in terms of the polymer - diluent interaction parameter χ and heat of mixing parameter B by means of a micromethod reported in the first part of this series. Among the diluents investigated are esters of phthalic, fumaric and maleic acids, alkyl-substituted benzenes, and condensed and conjugated aromatic ring systems. Relationships between solvency and diluent structure were sought in terms of the intermolecular forces involved in polymer - diluent associations. A condition found necessary for good solvency is that both the dispersion and dipolar forces acting between solvent molecules be similar in strength to the corresponding forces acting between polymer macromolecules. Steric hindrance of the carbonyl dipoles in the ester molecules, or of the aromatic nuclei in the hydrocarbon molecules, has a pronounced effect on the values of B. The extent of resonance interactions in the hydrocarbon molecules influence their solvent power. Where such interactions are reduced due to steric effects, solvency is also reduced.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1962.1205716501
