Size shrinkage of methacrylate-based terpolymer latexes synthesized by free radical polymerization: Kinetics and influence of main reaction parameters

S. Armini, C.M. Whelan, M. Smet, S Eslava, K. Maex

Research output: Contribution to journalArticle

  • 15 Citations

Abstract

Monodisperse PMMA-based terpolymer particles were synthesized by surfactant-free free radical emulsion polymerization. Particles with a wide and controllable range of size and polymer content were prepared by varying monomer amount, reaction temperature and initiator concentration. A kinetic study of the evolution of the terpolymer colloid composition and morphology reveals a mechanism of fast homogeneous nucleation. Copolymerizalion of the three monomers yields particles whose composition changes continuously during the reaction, which impacts polymer properties. Temperature and monomer amount are key parameters, particularly in the nucleation and growth stages of the reaction. A linear relationship between the particle size and reaction temperature is observed. This is attributed to the fact that the concentration of small, nucleated primary particles with high surface area, initiated at higher temperatures, is too large for efficient stabilization and hence they are more prone to aggregation. The linear relationship between the volume of the colloids and the ratio of main monomer to water in the reaction batch is due to the growth of the particles that continues while there is MMA available. The initiator concentration is not significant in terms of size and concentration of methacrylate-based colloids since primary particles are formed very early during polymerization and they are not dependent on the number of growing chains. The resulting "tailor-made" latexes are promising for a number of unique biotechnological and IC manufacturing applications.
LanguageEnglish
Pages786-798
Number of pages13
JournalEuropean Polymer Journal
Volume38
Issue number8
DOIs
StatusPublished - 1 Jan 2006

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Terpolymers
Methacrylates
Latex
Free radical polymerization
Latexes
Colloids
Monomers
Kinetics
Polymers
Nucleation
Temperature
Emulsion polymerization
Polymethyl Methacrylate
Chemical analysis
Free radicals
Surface-Active Agents
Particles (particulate matter)
Free Radicals
Surface active agents
Agglomeration

Cite this

Size shrinkage of methacrylate-based terpolymer latexes synthesized by free radical polymerization : Kinetics and influence of main reaction parameters. / Armini, S.; Whelan, C.M.; Smet, M.; Eslava, S; Maex, K.

In: European Polymer Journal, Vol. 38, No. 8, 01.01.2006, p. 786-798.

Research output: Contribution to journalArticle

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