Telechelic diols from polyhydroxybutyrate via alcoholysis with ethylene glycol or glycerol

DOI

10.2991/mmeceb-15.2016.51How to use a DOI?

Keywords

Polyhydroxybutyrate, Alcoholysis, Thermal properties, Molecular weight

Abstract

Controlled degradation of poly-hydroxybutyrate (PHB) can be obtained by alcoholysis with two types of alcohol in the presence of p-toluenesulfonic acid as catalyst. PHB oligomers terminated with free hydroxyl groups were prepared in this way and characterized using NMR, DSC and TG analyses. The degradation proceeds by random chain scission and the molecular weight was decreased by almost two orders of magnitude. The melting temperature, Tm, and the degradation temperature (Td) of PHB after alcoholysis, investigated by differential scanning calorimetry (DSC) and TG analyses show a decrease in Tm and Td with decreased molecular weight. Oligomers terminated with free reactive hydroxyl groups and Tm decreased by approximately 22 are liable to be used in the next step for further modification.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Dan Xue
AU  - Wei Lv
AU  - Heng Zhang
PY  - 2015/12
DA  - 2015/12
TI  - Telechelic diols from polyhydroxybutyrate via alcoholysis with ethylene glycol or glycerol
BT  - Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology
PB  - Atlantis Press
SP  - 259
EP  - 263
SN  - 2352-5401
UR  - https://doi.org/10.2991/mmeceb-15.2016.51
DO  - 10.2991/mmeceb-15.2016.51
ID  - Xue2015/12
ER  -