Synthesis and characterization of hydrophobically modified cationic polyacrylamide with low concentration of cationic monomer

Khai Ern Lee, Beng Teik Poh, Norhashimah Morad, Tjoon Tow Teng

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Hydrophobically modified cationic polyacrylamides were synthesized via free radical solution copolymerization using ammonium persulphate/sodium hydrogen sulphite as the redox initiator. Epichlorohydrin, acrylamide and trialkylamine were used to synthesize the hydrophobic cationic monomer 3-acrylamido-2- hydroxypropyltriakylammonium chloride (AHPTAAC) in which the trialkyl group was trihexylamine (AHPTHAC), trioctylamine (AHPTOAC) and tridodecylamine (AHPTDAC). Low concentration (1-6 mol%) of cationic monomer from each group were copolymerized with acrylamide to obtain hydrophobically modified cationic polyacrylamide. Results show that the intrinsic viscosity and molecular weight of the copolymers decreases with the concentration of the hydrophobic cationic group, whereas charge density indicates the reverse behaviour. Fourier Transform Infrared (FTIR) and Transmission Electron Microscopy (TEM) were also carried out to elucidate the structure of the copolymer.

Original languageEnglish
Pages (from-to)240-249
Number of pages10
JournalJournal of Macromolecular Science, Part A: Pure and Applied Chemistry
Volume46
Issue number3
DOIs
Publication statusPublished - Mar 2009
Externally publishedYes

Fingerprint

Acrylamide
Polyacrylates
Copolymers
Monomers
Epichlorohydrin
Ammonium persulfate
Charge density
Free radicals
Copolymerization
Free Radicals
Chlorides
Fourier transforms
Molecular weight
Sodium
Viscosity
Transmission electron microscopy
Infrared radiation
Hydrogen
polyacrylamide
tri-N-octylamine

Keywords

  • Cationic polyacrylamide
  • Charge density
  • Molecular weight

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Ceramics and Composites
  • Chemistry(all)

Cite this

Synthesis and characterization of hydrophobically modified cationic polyacrylamide with low concentration of cationic monomer. / Lee, Khai Ern; Poh, Beng Teik; Morad, Norhashimah; Teng, Tjoon Tow.

In: Journal of Macromolecular Science, Part A: Pure and Applied Chemistry, Vol. 46, No. 3, 03.2009, p. 240-249.

Research output: Contribution to journalArticle

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