Elution of polymers from poly(vinyl alcohol) cast gels with different degrees of polymerization and hydrolysis

Saori Sasaki, Emiko Otsuka, Yumiko Hirashima, Atsushi Suzuki

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Poly(vinyl alcohol) (PVA) gels physically crosslinked by microcrystallites were prepared by a cast-drying method using PVA powders with different degrees of polymerization (n DP) between 300 and 2400 and hydrolysis (r DH) between 79.5 and 98.5 mol %. Polymer elution of gels in a limited amount of water was investigated by measuring the total carbon in the outer water by a total organic carbon analyzer. As a result, polymer elution was detected for all gels, the total amount of which depended on both n DP and r DH. In the cases of lower n DP and higher r DH, the gel became opaque and cracks were observed on the surface during a simple swelling process. On the other hand, polymers dissolved without cracks in the cases of higher n DP and lower r DH. These results are discussed on the basis of the network microstructure of the dried states before and after the polymer elution.

Original languageEnglish
Pages (from-to)E233-E241
JournalJournal of Applied Polymer Science
Volume126
Issue numberSUPPL. 2
DOIs
Publication statusPublished - Nov 25 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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