ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
High-molecular-weight polyphosphazenes are of considerable interest because of their potential use as relatively high temperature materials that also possess low glass temperature. A number of authors have examined the thermal properties of a wide range of polyphosphazenes. These studies, however, have usually been limited to compression-molded samples or to samples where the morphology or thermal history are poorly understood or highly complex. This article reports the thermal behavior of a single polymer, poly(bisphenoxyphosphazene) starting with the simplest morphological entity - the single crystal. The result of crystallization from the mesomorphic state [above T(1)] and from the melt were also examined, together with the influence of thermal cycling and heating rate. The effects of a variety of parameters on T(1) are reported. This work clearly demonstrates the importance of morphology-crystallization conditions in determining T(1) and suggests the presence of two crystal forms for this polymer.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1982.070270534
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