THERMODYNAMIC PROPERTIES OF POLYMETHYL METHACRYLATE AND METHYL METHACRYLATE

Abstract

Lack of information on the fundamental thermodynamic properties of polymethyl methacrylate and methyl methacrylate prompted a study of the available thermodynamic parameters of these materials. From published data the entropy, enthalpy, and Gibbs free energy values of polymethyl methacrylate were calculated over the temperature range 0 to 260 K. The thermodynamic function, Cp/sub T vs T, has been calculated and exhibits a maximum value between 70 and 100 K. An approximation is made of the number of vibrating units per repeating unit of polymethyl methacrylate at 260 K. The difference Cp -C sub v calculated at 260 K and found to be 0.014 cal/ deg gm. It is recommended that additional low temperature specific heat measurements be made on polymers and monomers.

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Document Details

Document Type
Technical Report
Publication Date
Jan 17, 1962
Accession Number
AD0286502

Entities

People

  • M. C. Petree
  • R. W. Warfield

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alkenes
  • Biomedical And Dental Materials
  • Chemistry
  • Dielectric Polymers
  • Heat Capacity
  • Low Temperature
  • Materials
  • Materials Laboratories
  • Materials Science
  • Munitions
  • Ordnance Laboratories
  • Plastics
  • Polymer Chemistry
  • Polymeric Films
  • Polymethyl Methacrylate
  • Specific Heat
  • Thermodynamic Properties

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Polymer Science and Technology