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

35 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

Fingerprint

starches
Atom transfer radical polymerization
Starch
oligomers
Oligomers
copolymers
polymerization
Graft copolymers
Grafts
atoms
Polymethyl Methacrylate
Hydrophobicity
Angle measurement
hydrophobicity
Polymethyl methacrylates
polymethyl methacrylate
Hydroxyl Radical
Contact angle
molecular weight
Polymers

Keywords

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

Cite this

Nurmi, Leena ; Holappa, Susanna ; Mikkonen, Hannu ; Seppälä, Jukka. / Controlled grafting of acetylated starch by atom transfer radical polymerization of MMA. In: European Polymer Journal. 2007 ; Vol. 43, No. 4. pp. 1372-1382.
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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.",
keywords = "polysaccharide, starch, graft copolymer, ATRP, atom transfer radical polymerization, acetylated starch oligomer, poly(methyl methacrylate)",
author = "Leena Nurmi and Susanna Holappa and Hannu Mikkonen and Jukka Sepp{\"a}l{\"a}",
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Controlled grafting of acetylated starch by atom transfer radical polymerization of MMA. / Nurmi, Leena; Holappa, Susanna; Mikkonen, Hannu; Seppälä, Jukka (Corresponding Author).

In: European Polymer Journal, Vol. 43, No. 4, 2007, p. 1372-1382.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Controlled grafting of acetylated starch by atom transfer radical polymerization of MMA

AU - Nurmi, Leena

AU - Holappa, Susanna

AU - Mikkonen, Hannu

AU - Seppälä, Jukka

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

KW - polysaccharide

KW - starch

KW - graft copolymer

KW - ATRP

KW - atom transfer radical polymerization

KW - acetylated starch oligomer

KW - poly(methyl methacrylate)

U2 - 10.1016/j.eurpolymj.2007.01.038

DO - 10.1016/j.eurpolymj.2007.01.038

M3 - Article

VL - 43

SP - 1372

EP - 1382

JO - European Polymer Journal

JF - European Polymer Journal

SN - 0014-3057

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ER -