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Influence of Molecular Structure and Stereochemistry of the 1,4‐Cyclohexylene Ring on Thermal and Mechanical Behavior of Poly(butylene 1,4‐cyclohexanedicarboxylate)
Author(s) -
Berti Corrado,
Celli Annamaria,
Marchese Paola,
Marianucci Elisabetta,
Barbiroli Giancarlo,
Di Credico Francesco
Publication year - 2008
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/macp.200800125
Subject(s) - ring (chemistry) , glass transition , polymer chemistry , crystallization , polyester , chemistry , polymer , dynamic mechanical analysis , degradation (telecommunications) , ring size , thermal analysis , materials science , thermal , organic chemistry , thermodynamics , telecommunications , physics , computer science
Poly(butylene 1,4‐cyclohexanedicarboxylate), an aliphatic polyester with favorable properties, such as resistance to weather and potential biodegradability, has been synthesized with different cis/trans ratio of the 1,4‐cyclohexylene ring. The samples show high degradation temperatures, independent of the stereochemistry of the aliphatic ring. Instead, glass transition temperature, crystallization and melting behavior are strongly influenced by the cis/trans ratio. The trans isomer, more rigid and symmetric than the cis , favors higher transition temperatures and crystallizability. The DMTA spectra present two secondary relaxations, attributed to the (CH 2 ) unit and aliphatic ring motions, which can be beneficial for improving impact resistance properties. The physical properties are compared with those of PBT and PCCD.