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Korean Carbon Society (한국탄소학회)
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Thermal properties in strong hydrogen bonding systems composed of poly(vinyl alcohol), polyethyleneimine, and graphene oxide

  • Choi, Sua (Department of Chemical Engineering, Dong-A University) ;
  • Hwang, Duck Kun (Department of Corporate Diagnosis, Small & Medium Business Corporation) ;
  • Lee, Heon Sang (Department of Chemical Engineering, Dong-A University)
  • Received : 2014.07.11
  • Accepted : 2014.09.25
  • Published : 2014.10.31
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Abstract

Blends of poly(vinyl alcohol) (PVA), polyethyleneimine (PEI), and graphene oxide (GO) were prepared by solution casting method. Calorimetric thermal properties of the blends were investigated. The $T_gs$ of PVA/PEI blends were higher than the $T_gs$ of either of the component polymers at low concentrations of PEI. These abnormal increases of $T_gs$ may be due to the negative entropy of mixing which is associated with strong hydrogen bonding between PVA and PEI. The degree of depression of $T^0_ms$ was not reduced by the negative entropy of mixing, since strong hydrogen bonding also causes an increase in the magnitude of negative ${\chi}$ between PVA and PEI. The $T_g$ of PVA was increased significantly by adding 0.7 wt.% GO into PVA. The magnitude of negative ${\chi}$ was increased by adding GO into the blends of PVA and PEI.

Keywords

References

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