Controlled grafting of acetylated starch by atom transfer radical polymerization of MMA

Leena Nurmi, Susanna Holappa, Hannu Mikkonen, Jukka Seppälä (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

38 Citations (Scopus)

Abstract

Graft copolymers of acetylated starch oligomer (AS) and poly(methyl methacrylate) (PMMA) were polymerized by atom transfer radical polymerization (ATRP).
AS was converted to an ATRP macroinitiator by converting a part of the hydroxyl groups of AS to 2-bromoisobutyryl groups. Macroinitiators with varying degrees of substitution for the 2-bromoisobutyryl group were prepared.
The polymerizations were conducted using CuBr/BiPy catalyst system, either in bulk or in 1:1 v/v THF solution.
They proceeded with first-order kinetics and the molecular weights of the polymers increased linearly with conversion. Graft copolymers with different graft densities and graft lengths were prepared in a controlled manner.
The hydrophobicity of these copolymers was studied by contact angle measurements.
Original languageEnglish
Pages (from-to)1372-1382
JournalEuropean Polymer Journal
Volume43
Issue number4
DOIs
Publication statusPublished - 2007
MoE publication typeA1 Journal article-refereed

Keywords

  • polysaccharide
  • starch
  • graft copolymer
  • ATRP
  • atom transfer radical polymerization
  • acetylated starch oligomer
  • poly(methyl methacrylate)

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