Accession Number : ADA130101

Title :   Final Report on AFOSR-81-0042.

Descriptive Note : Final rept. 1 Oct 81-30 Sep 82,

Corporate Author : BOSTON UNIV MA CENTER FOR POLYMER STUDIES

Personal Author(s) : Stanley,H Eugene

PDF Url : ADA130101

Report Date : Sep 1982

Pagination or Media Count : 64

Abstract : A statistical-mechanical model for reversible gelation is developed. This model takes into account solvent effects, which usually are neglected in the calssical theory of gelation. The exact solution of this model is given for the limiting case in which 'loops' or intermolecular interactions may be neglected (Cayley tree). The general phase diagram is obtained and it is shown that, with a particular choice of a solvent, one can realize the interesting situation in which gelation point and consolute point coincide. This point has peculiar properties associated with the simultaneous divergence of 'connectivity' and thermal fluctutation. The recent experimental data of Tanka and collaborators are in good qualitative agreement with the predictions of the model.

Descriptors :   *Statistical analysis, *Models, *Gelation, *Phase diagrams, *Theory, Gels, Mechanical properties, Molecule molecule interactions, Loops, Solvents, Thermal properties, Variations

Subject Categories : Industrial Chemistry and Chemical Processing
      Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE