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1 Polish Journal of Applied Chemistry

1 2009

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Internal dynamics of poly(ethylene glycol-co-cyclohexane-1,4-dimethanol terephthalate)PETG- Si02 composite by H NMR methods

Baranowski M., Piec Sz., Matuszak A., Gwozdzik-Bujakowski R., Jurga J., Woźniak-Braszak A., Hołderna-Natkaniec K.

Polish Journal of Applied Chemistry

2009

Vol. 53, nr 2

109-115

Internal dynamics of poly(cthylene glycol-co-cyclohexane-l,4-dimethanol terephthalate)-Si02 (PETG-SiOj) composites has been studied by 'H Nuclear Magnetic Resonance (NMR) methods. The activation energy of trans- gauche isomerization and oscillation (below Tg) and chain reorientation (above Tg) was estimated. With increasing weight of silica filler in the PETG matrix the molecular motions are slower, as the experimental relaxation times are longer and the temperature dependence of the second moment of'H NMR line is shifted towards higher temperatures.