Effects of propylene glycol on the physical properties of poly(vinyl alcohol) solutions and films

Yong Han Cho, Byoung Chul Kim, Kyung Sik Dan

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

To trace the plasticizing effects of propylene glycol (PG) on poly(vinyl alcohol) (PVA), the rheological properties of PVA solutions in dimethyl sulfoxide (DMSO) and the physical properties of PVA films were discussed in terms of PG content. Both properties were closely related to the hydrogen bond breaking effects of PG The 6 and 12 wt% PVA solutions containing PG exhibited Bingham behavior, which was more noticeable at lower plasticizer content and higher polymer concentration. The 6 wt% PVA solutions containing more than 30 wt% PG showed a sudden decrease of viscosity over the frequency range of 0.08 and 0.2 rad/s. However, the 12 wt% PVA solutions showed no viscosity reduction even at a PG content up to 40 wt%. The glass transition temperature of the PVA/PG films was almost linearly decreased with increasing PG content but an abrupt reduction was observed at a plasticizer content 30 wt%, suggesting that the hydrogen bond breaking effects of PG on PVA became dominant between 20 and 30 wt%. This effect was further supported by the similar tendency of the tensile properties.

Original languageEnglish
Pages (from-to)591-596
Number of pages6
JournalMacromolecular Research
Volume17
Issue number8
DOIs
Publication statusPublished - 2009 Aug

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Keywords

  • Hydrogen bond
  • Poly(vinyl alcohol) film
  • Poly(vinyl alcohol) solution
  • Propylene glycol
  • Rheological properties

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