Heterogeneous polymerization with polyaspartate macromonomer having vinyl pendant groups. II. Control of particle diameter and diameter distribution in dispersion copolymerization

Keisuke Tomita, Tsutomu Ono

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

To control particle diameter and particle diameter distribution in dispersion copolymerization of styrene and sodium polyaspartate macromonomer containing vinylbenzyl pendant groups, effects of some polymerization parameters, water contents, initiator concentration, styrene monomer concentration, reaction temperature, and type of initiator on the particle diameter and the diameter distribution were investigated. Variation of the water contents from 20 to 80 vol % controls the resultant particle diameter from 0.066 to 0.47 mm. The diameter increased with increasing initiator concentration. This tendency is similar to dispersion polymerization system using a nonpolymerizable stabilizer. Particle diameter distribution broadened with increasing styrene monomer concentration. This trend was attributed to the increase of a period of particle formation. This result indicated that the period of particle formation affected the resultant particle diameter distribution. Particle diameter distribution was successfully improved (CV = 9.1 from 23.6%) by shortening of decomposition time of initiator.

Original languageEnglish
Pages (from-to)2281-2288
Number of pages8
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume47
Issue number9
DOIs
Publication statusPublished - May 1 2009

Keywords

  • Colloids
  • Dispersion polymerization
  • Macromonomers
  • Particle nucleation
  • Particle size distribution

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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