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Thermal and dynamic mechanical behavior of ethylene/norbornene copolymers with medium norbornene contents
Author(s) -
Forsyth John F.,
Scrivani Teresa,
Benavente Rosario,
Marestin Catherine,
Pereña José M.
Publication year - 2001
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.2063
Subject(s) - norbornene , differential scanning calorimetry , glass transition , materials science , copolymer , polymer chemistry , amorphous solid , polymer , dynamic mechanical analysis , atmospheric temperature range , ethylene , chemical engineering , composite material , catalysis , chemistry , organic chemistry , thermodynamics , physics , engineering
A range of ethylene/norbornene copolymers were synthesized using the commercially available rac ‐Et(Ind) 2 ZrCl 2 metallocene catalyst. A large window of norbornene contents, between 30 and 55 mol % was used to facilitate the interpretation of the results. The polymers were characterized by means of wide‐angle X‐ray scattering, differential scanning calorimetry, and dynamic mechanical thermal analysis. The X‐ray diffractograms showed two amorphous halos, the low‐angle one increasing in the intensity with norbornene content. Calorimetric and dynamic mechanical results led to a linear relation between the glass transition temperature and the norbornene content. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2159–2165, 2001