Molecular dynamics of poly(ethylene 2,6-naphthalate)-polycarbonate composite by nuclear magnetic resonance

The aim of the work was to examine molecular dynamics of a series of poly(ethylene 2,6-naphthalate)-polycarbonate blends with changing weight ratio of copolymers by off-resonance nuclear magnetic resonance technique. It was shown that this technique provides information about the correlation times o...

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Bibliographic Details
Published in:Applied magnetic resonance 2005-06, Vol.29 (2), p.221-229
Main Authors: Woźniak-Braszak, A., Szostak, M., Jurga, K., Jurga, J., Piekarz, A., Baranowski, M.
Format: Article
Language:English
Subjects:
Compatibilizers
Copolymers
Injection molding
Molecular dynamics
NMR
Nuclear magnetic resonance
Polycarbonate resins
Polyethylene naphthalate
Polymer blends
Relaxation time
Spectral density function
Spin-lattice relaxation
Transesterification
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Summary:The aim of the work was to examine molecular dynamics of a series of poly(ethylene 2,6-naphthalate)-polycarbonate blends with changing weight ratio of copolymers by off-resonance nuclear magnetic resonance technique. It was shown that this technique provides information about the correlation times of the internal motions. The spectral density function amplitudes were estimated on the basis of the dispersion of the spin-lattice relaxation time off-resonanceTlpoff. The measurements were performed for two series of blends which had been injection moulded with and without compatibilizer. The new polymer materials were also characterized using differential scanning calorimetry. Samples obtained after injection moulding and annealing became amorphous, which indicates that a reaction of transesterification process between the two polymers occurred.
ISSN:0937-9347
1613-7507
DOI:10.1007/BF03167010