Accession Number:

ADA167165

Title:

Thermal Behavior of Polyphosphazenes in Relation to Structure.

Descriptive Note:

Technical rept.,

Corporate Author:

PITTSBURGH UNIV PA SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1986-04-10

Pagination or Media Count:

40.0

Abstract:

Differential scanning calorimetry has been employed to characterize polyphosphazene homopolymers. Thermal analysis provided a qualitative and quantitative description of the magnitude of the enthalpies of transition at Tg, T1 and Tm and the relative change in these temperatures with heating, cooling and time of annealing, too. Aryloxy and alkoxy homopolymers were investigated. Changes in morphology and crystallinity were correlated with thermodynamic parameters to provide a basic understanding of mesophase formation and the conditions which influence the behavior of these flexible liquid crystal-forming macromolecules which have considerable potential technologically. Keywords DSC thermal properties, Specific heat, Enthalpy of transition, Crystallinity, Mesophases, and Morphology.

Subject Categories:

  • Physical Chemistry
  • Plastics
  • Elastomers and Rubber

Distribution Statement:

APPROVED FOR PUBLIC RELEASE