Effects of repeated water exchange and the molecular-weight distribution of PVA cast gels on the elution of polymers

Saori Sasaki, Atsushi Suzuki

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)

抄録

The elution behaviors of polymers from hydrogels are studied using repeated water exchange on poly(vinyl alcohol) (PVA) gels. Physically cross-linked PVA gel was prepared using a cast-drying method from several powders with a high degree of hydrolysis (98.5 mol%) and varying degrees of polymerization (500, 1000, 1700, and 2400). The gels were immersed in water, which was then repeatedly exchanged with and without an immediate drying process. The elution of polymers from a PVA cast gel was estimated by quantitatively measuring the total carbon in the solvent water using a total organic carbon analyzer; a measurement was taken each time the solvent water was exchanged, and the amount of polymers eluted approached zero after sufficient water exchange. The total amount of polymers eluted is dependent on the degree of polymerization of the PVA powders. Additionally, the molecular-weight distributions of the PVA powders used for gelation and the polymers eluted in the solvent water were evaluated using a high performance liquid chromatography. The average molecular-weight of the eluted polymers was less than that of the PVA powders. The elution behaviors during repeated water exchange are discussed on the basis of the amount eluted and the molecular-weight distribution of the eluted polymers; these factors are dependent on the nature of the PVA powders.

本文言語英語
ページ(範囲)878-884
ページ数7
ジャーナルReactive and Functional Polymers
73
7
DOI
出版ステータス出版済み - 2013
外部発表はい

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 環境化学
  • 生化学
  • 化学工学(全般)
  • ポリマーおよびプラスチック
  • 材料化学

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