Polyvinyl Esters of Omega-H-Perfluoroacids and Polyvinyl Alcohol Obtained from Them,

Abstract

By means of radical polymerization at 20 we obtained polyvinyl esters of omega-H-perfluoroacids from monomers. The product of their saponification - polyvinyl alcohol (PVA) - differs significantly from PVA which is obtained by other methods (mainly with respect to its exceptionally high water resistance). It contains 0-0.25% glycol groups (based on oxidation of periodic acid). When heated higher than the glass transition temperature Tc = 90 it is crystallized rapidly, and it has a melting point Tn = 236 (determined dilatometrically) and increased density d20 = 1.315 g/cc. There are no cross bonds in PVA; a melt of it is fluid. PVA dissolved only at a temperature higher than 150 (under pressure). In the IR spectra of PVA a band of absorption of increased intensity was detected at 916/cm. This is characteristic for a syndiotactic structure.

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Document Details

Document Type
Technical Report
Publication Date
Aug 24, 1987
Accession Number
ADA184633

Entities

People

  • L. D. Budovskaya
  • Ye. N. Rostovskiy

Organizations

  • National Air and Space Intelligence Center

Tags

DTIC Thesaurus Topics

  • Alcohols
  • Biodegradable Plastics
  • Diffraction
  • Foreign Technology
  • Glass Transition Temperature
  • Iodine Compounds
  • Melting Point
  • Phase Transformations
  • Plastics
  • Polymers
  • Polyvinyl Alcohol
  • Polyvinyls
  • Standards
  • Transition Temperature
  • Translations
  • X Rays
  • X-Ray Diffraction

Readers

  • Analytical Chemistry
  • Materials Science and Engineering.
  • Polymer Science and Engineering.