Accession Number : ADA187089

Title :   Potential Barriers and Internal Rotation in Polyvinyl Acetate and Poly-o-Fluorostyrene,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Gotlib, Yu Ya ; Darinskiy, A A

PDF Url : ADA187089

Report Date : 31 Aug 1987

Pagination or Media Count : 12

Abstract : The present work is devoted to presenting the results of a calculation of potential barriers of internal rotation in the side pendant of some polymers, namely polyvinyl acetate (PVAc) and poly-o-fluorostyrene (POFS), connected namely with the steric repulsion of atoms of the side radicals and the main chain. Furthermore, for POFS it is possible to estimate the contribution of the magnitude of the potential barrier due to the interaction of atoms of neighboring chains. It is difficult to make such an estimate for PVAc, since the nearest order in this polymer is unknown. The semiempirical expressions used for the potentials of interaction of the atoms, the method and the physical and mathematical hypotheses of calculation which were used were set forth in our previous article, devoted to the calculation of the barriers of internal rotation in the side radicals of polymethyl acrylate.

Descriptors :   *ACETATES, *POLYMERS, *VINYL PLASTICS, *STYRENES, *FLUORINE COMPOUNDS, ATOMS, BARRIERS, CHAINS, CHEMICAL RADICALS, HYPOTHESES, INTERACTIONS, INTERNAL, MATHEMATICS, PHYSICAL PROPERTIES, ROTATION

Subject Categories : Polymer Chemistry
      Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE