Substitution of corn starch with polycaprolactone via chlorination and water resistance of the substituted starch

Dong Keon Kweon, Seung Taik Lim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Corn starch was chlorinated using methanesulfonyl chloride in dimethylformamide (DMF) and then substituted with polycaprolactone (PCL) in various solvents [dimethylsulfoxide (DMSO), water and dimethylacetamide (DMAc)] containing a catalyst [sodium hydroxide (NaOH) or lithium chloride (LiCl)] to improve water resistance. The reaction yield based on the product weight was highest (85%) when DMAc and LiCl were used. Fourier transform infrared (FTIR) spectra showed that starch was monosubstituted with PCL in the aqueous NaOH solution, whereas it was to crosslink by PCL in the case using DMAc and LICl. The intrinsic viscosity of the products in DMSO supports these trends. By introducing the hydrophobic PCL onto starch, solvent resistance of the substituted starches to water and other aqueous media increased. The crosslinked starch displayed higher water resistance than the monosubstituted starch.

Original languageEnglish
Pages (from-to)2197-2202
Number of pages6
JournalJournal of Applied Polymer Science
Volume81
Issue number9
DOIs
Publication statusPublished - 2001 Aug 29

Keywords

  • Chlorinated starch
  • Crosslinked starch with PCL
  • Monosubstituted starch with PCL

ASJC Scopus subject areas

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

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