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Thermal properties of polynorbornene (cis- and trans-) and hydrogenated polynorbornene

AuthorsEsteruelas, Miguel A. ; González, Fernando; Herrero, Juana; Lucio, Patricia; Oliván, Montserrat ; Ruiz-Labrador, Begoña
Issue DateMay-2007
CitationPolymer Bulletin 58(5-6): 923-931 (2007)
AbstractThe thermal properties of trans-polynorbornene, cis-polynorbornene and hydrogenated polynorbornene were examined and its reversibility tested. Trans-polynorbornene samples, formed in various solvents, exhibit a softening range, from ambient temperature until 375 °C. However, syndiotactic cis-polynorbornene samples show a narrower melting range (between 150 and 375 °C). The fusion enthalpies of cis-polynorbornene samples are around 300-400 J/g. The temperature of decomposition is ca. 456 °C (minimum peak DSC) for trans-polynorbornene and ca. 466 °C, 10 °C higher, for cis-polynorbornene. The solvent used for the polymerization of norbornene has a negligible influence in the melting temperature range or in the decomposition temperature. The treatment with 2,6-di-tert-butyl-4-methyl-phenol during the isolation of polynorbornene leads to materials with different thermal properties. Trans-polynorbornene isolated without 2,6-di-tert-butyl-4-methyl-phenol exhibited an exothermic peak accompanied by an slight increase in weight (1-2%), while samples treated with 2,6-di-tert-butyl-4-methyl-phenol do not show these features.
Description9 pages, 2 tables, 3 figures.
Publisher version (URL)http://dx.doi.org/10.1007/s00289-007-0734-4
Appears in Collections:(ICMA) Artículos
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