Solid State ^{13}C NMR Study of Modified Polyhydroxybutyrate

• Authors: P. Vrábel , V. Hronský , O. Fričová , M. Koval'aková , I. Chodák , P. Alexy
• Languages of publication: EN

Abstracts

EN

Structural changes in polyhydroxybutyrate (PHB) brought about by addition of chain extender and/or plasticizer were studied using ^{13}C MAS NMR spectra, which were measured using the direct polarization technique at 30 and 98°C. Four resonances associated with the CO, CH, CH_{2} and CH_{3} groups of PHB were observed in the spectra. The CH_{3} resonance appearing at 98°C shows splitting into two lines related to the crystalline and amorphous regions. Analysis of the CH_{3} resonances made it possible to estimate the influence of applied modifications on crystallinity and distribution of conformations in amorphous and crystalline domains of PHB samples.

Keywords

EN

61.41.+e; 76.60.-k; 81.05.Lg

Discipline

• 76.60.-k: Nuclear magnetic resonance and relaxation(see also 33.25.+k Nuclear resonance and relaxation in atomic and molecular physics and 82.56.-b Nuclear magnetic resonance in physical chemistry and chemical physics; for structure determination using magnetic resonance techniques, see 61.05.Qr; for biophysical applications, see 87.80.Lg; for NMR in superconducting materials, see 74.25.nj)
• 61.41.+e: Polymers, elastomers, and plastics(see also 81.05.Lg in materials science; for rheology of polymers, see section 83; for polymer reactions and polymerization, see 82.35.-x in physical chemistry and chemical physics)
• 81.05.Lg: Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials(for polymers and organic materials in electrochemistry, see 82.45.Wx)

• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 1
• Pages: 419-420

Dates

published

2014-07

Contributors

author

P. Vrábel

• Department of Physics, Technical University of Košice, Park Komenského 2, 042 00 Košice, Slovakia

author

V. Hronský

• Department of Physics, Technical University of Košice, Park Komenského 2, 042 00 Košice, Slovakia

author

O. Fričová

• Department of Physics, Technical University of Košice, Park Komenského 2, 042 00 Košice, Slovakia

author

M. Koval'aková

• Department of Physics, Technical University of Košice, Park Komenského 2, 042 00 Košice, Slovakia

author

I. Chodák

• Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia

author

P. Alexy

• Institute of Polymer Materials, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia

References

• [1] P. Alexy, P. Bugaj, J. Feranc, M. Pavlačková, K. Tomanová, F. Benovič, R. Plavec, M. Mihalík, M. Botošová, Chem. Listy 105, 241 (2011)
• [2] F. Nozirov, Z. Fojud, J Klinowski, S. Jurga, Solid State Nucl. Magn. Reson. 21, 197 (2002), doi: 10.1006/snmr.2002.0060
• [3] L. Zhang, H. Tang, G. Hou, Y. Shen, F. Deng, Polymer 48, 2928 (2007), doi: 10.1016/j.polymer.2007.03.026

Identifiers

DOI

10.12693/APhysPolA.126.419