Journal of Thermal Analysis and Calorimetry

, Volume 132, Issue 2, pp 1423–1427 | Cite as

Use of DSC in degree of conversion of dimethacrylate polymers: easier and faster than MIR technique

  • Rafael Turra Alarcon
  • Caroline Gaglieri
  • Arthur Rossi de Oliveira
  • Gilbert Bannach
Article

Abstract

This work aims to determine the degree of conversion of polymers obtained using diurethane dimethacrylate (UDMA) monomer by two different techniques: differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (MIR). The measurements were made in triplicate on both equipment, which resulted in average values for MIR 79.52 ± 3.57% (camphorquinone photoinitiator) and 78.15 ± 1.86% (fluorescein photoinitiator) and for DSC 80.85 ± 1.06 and 78.27 ± 1.71%. The DSC technique showed higher accuracy and lesser standard deviation. Furthermore, this technique is easier and faster than the MIR, and in situ polymerization is not necessary on the DSC equipment.

Keywords

Photopolymerization DSC MIR Degree of conversion Techniques comparison Dimethacrylate 

Notes

Acknowledgements

The authors wish to thank CAPES (Proc. 024/2012 Pro-equipment), POSMAT/UNESP, and FAPESP (Processes: 2 2013/09022-7 and 2017/08820-8) for financial support.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Rafael Turra Alarcon
    • 1
  • Caroline Gaglieri
    • 1
  • Arthur Rossi de Oliveira
    • 1
  • Gilbert Bannach
    • 1
  1. 1.Chemistry Department, School of SciencesSão Paulo State University (UNESP)BauruBrazil

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