Preparation and characterization of iodinated poly(vinyl alcohol) microfibril

Won Seok Lyoo, Sam Soo Kim, Han Do Ghim, Jae Pil Kim, Ick Chan Kwon, Chul Joo Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Iodination of poly(vinyl alcohol) (PVA) microfibril, which was obtained from saponification of poly(vinyl pivalate), was conducted before and after zone drawing at various conditions. The resulting PVA microfibrils were characterized by differential scanning calorimeter and scanning electron microscopy. Surface morphologies of these PVA microfibrils showed some differences between PVA microfibril iodinated after and before drawing. Crude shapes of PVA microfibrils iodinated after drawing indicated that iodine decreased the structural regularity severely. On the other hand, PVA microfibrils iodinated before drawing showed relatively ordered surfaces. This was ascribed to the enhanced molecular ordering of PVA microfibrils due on zone drawing. Iodinated PVA micro fibrils showed a decrease in crystal melting temperature of about 100°C compared to the untreated sample. PVA microfibrils drawn after iodination showed relatively higher crystal melting temperature than those of microfibrils iodinated after drawing. These results were considered as the proofs of the changes in crystalline lattice of the PVA micro fibrils. Effects of drawing temperature on sublimation of iodine were also evaluated.

Original languageEnglish
Pages (from-to)125-132
Number of pages8
JournalMacromolecular Symposia
Volume180
DOIs
Publication statusPublished - 2002

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Preparation and characterization of iodinated poly(vinyl alcohol) microfibril'. Together they form a unique fingerprint.

  • Cite this