Preparation of poly(vinyl acetate) microspheres with narrow particle size distributions by low temperature suspension polymerization of vinyl acetate

Se Geun Lee, Jae Pil Kim, Ick Chan Kwon, Dong Soo Shin, Sung Soo Han, Won Seok Lyoo

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

To estimate influences of suspension polymerization conditions including conversion, polymerization temperature, stirring rate, initiator concentration, monomer concentration, and suspending agent concentration on the volume average diameter (Davg) and particle size distribution (PSD) of poly(vinyl acetate) (PVAc) microspheres, vinyl acetate (VAc) was suspension-polymerized at low temperature using 2,2′-azobis(2,4-dimethylvaleronitrile) as an initiator. The effects of each condition, on Davg of PVAc microspheres, were expressed as follows, Davg = [conversion] a[temperature]b[rpm]c[ADMVN] d[VAc]f [suspending agent]g. Logarithms of Davg were linearly proportional to those of polymerization conditions, and their exponents, a, b, c, d, f, and g were calculated as 0.27, -13.7, -1.37, -0.21, 0.58, and 0.29, respectively. Variations of PSDs, according to polymerization conditions, were examined by considering polymerization rate, droplet or suspension viscosity, and droplet break-up/coagulation equilibrium. From these results, PVAc microspheres with various sizes and narrow PSDs were obtained effectively under carefully controlled polymerization conditions, which can be used as promising precursors of novel PVA microspheres through heterogeneous surface saponification.

Original languageEnglish
Pages (from-to)4064-4070
Number of pages7
JournalJournal of Applied Polymer Science
Volume101
Issue number6
DOIs
Publication statusPublished - 2006 Sep 15

Keywords

  • Microspheres
  • Narrow PSD
  • PVAc
  • Suspension polymerization

ASJC Scopus subject areas

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

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