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Rheological Features of a Novel Poly(spiro phosphazene)
Author(s) -
Carriedo Gabino A.,
GómezElipe Paloma,
García Alonso Francisco J.,
Lizaso Eli,
Muñoz Maria E.,
Santamaría Antonia
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20011101)202:17<3437::aid-macp3437>3.0.co;2-h
Subject(s) - phosphazene , rheology , plateau (mathematics) , polymer chemistry , materials science , viscosity , composite material , texture (cosmology) , chemistry , polymer , mathematical analysis , image (mathematics) , mathematics , artificial intelligence , computer science
A study of the rheology of a new poly(2,2′‐dioxybiphenyl)phosphazene is presented. The results are conditioned by a two‐phase morphology and by the anisotropy of the melt, observed by microscopy in the range 200–320°C. Two temperature regions are distinguished: the range 260–320°C is characterized by the presence of a plateau zone (with G′ > G″ ) at intermediate frequencies, which is not detected at the range 220–260°C. The origin of this plateau is discussed. The typical rheological behavior of thermotropics, like three regions for the viscosity function and concentric “marble‐like” surface texture, is observed in plate‐plate flow, but not in extrusion flow.