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Thermomechanical behavior of a polynorbornadiene
Author(s) -
Roller M. B.,
Gillham J. K.,
Kennedy J. P.
Publication year - 1973
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.1973.070170721
Subject(s) - thermogravimetric analysis , glass transition , polymer , materials science , thermal stability , inert gas , differential scanning calorimetry , amorphous solid , thermal analysis , thermomechanical analysis , differential thermal analysis , degradation (telecommunications) , solubility , dynamic mechanical analysis , hydrocarbon , chemical engineering , thermodynamics , polymer chemistry , composite material , thermal , organic chemistry , chemistry , thermal expansion , physics , telecommunications , diffraction , computer science , optics , engineering
A high‐temperature linear amorphous hydrocarbon polymer synthesized cationically from 2,5‐norbornadiene (bicyclo[2.2.1]hepta‐2,5‐diene), was studied thermomechanically with respect to physical transitions and stability in nitrogen. The glass transition temperature was determined to be 320°C (at less than 1 cps), which is probably the highest known for a linear hydrocarbon addition polymer. The thermomechanical technique of torsional braid analysis, together with thermogravimetric analysis, differential thermal analysis, infrared analysis, and solubility studies, was used to investigate the sequential events of the glass transition and degradation. The polymer is of particular interest since it is a high‐temperature plastic which in the bulk form would probably need to be processed at high speeds in the vicinity of T g in an inert atmosphere. The presence of tertiary hydrogen atoms should render it amenable to degradation by the earth's environment.