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Poly[bis( m ‐chlorophenoxy)phosphazene]. Macromolecular characterization and degradation studies
Author(s) -
Hagnauer G. L.,
Laliberte B. R.
Publication year - 1976
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1976.070201113
Subject(s) - phosphazene , polyphosphazene , polymer , macromolecule , polymer chemistry , branching (polymer chemistry) , polystyrene , solubility , depolymerization , materials science , polymer degradation , molar mass distribution , chemistry , organic chemistry , biochemistry
The macromolecular structures of five poly[bis( m ‐chlorophenoxy)phosphazene] samples are critically analyzed. There are significant variations in the solubility behavior and physical properties of the polymers. Property differences are attributed mainly to the incomplete nucleophilic substitution of the dichlorophosphazene polymer precursor. All the polymers are found to have high molecular weights and broad, bimodal molecular weight distributions. However, differences in branching are noted and the presence of thermally labile “weak links” on the polymer chain backbones is suspected. At 165°C in static air, the polyphosphazene degrades by a random degradation mechanism and for long exposure times is considerably more stable than polystyrene.