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Submicron Sized Hollow Polymer Particles: Preparation and Properties
Author(s) -
Pavlyuchenko Valery N.,
Sorochinskaya Olga V.,
Primachenko Oleg N.,
Ivanchev Sergey S.
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200550820
Subject(s) - polymer , methacrylic acid , cationic polymerization , materials science , copolymer , methacrylate , melamine resin , polymer chemistry , styrene , chemical engineering , monomer , emulsion polymerization , emulsion , particle size , composite material , coating , engineering
The considered method for obtaining hollow polymer particles is based on the following pathway: (1) preparation of a carboxylated core latex by emulsion copolymerization of acrylic monomers with methacrylic acid, (2) synthesis of a core‐shell latex comprising a styrene (co)polymer shell, (3) neutralization of the core carboxylic groups with a base followed by the core ionization and hydration to a high degree, shell expansion and formation of water‐filled hollows. A number of approaches to improve the hydrophilic core – hydrophobic shell compatibility and enlarge the hollow volume are considered. The synthesized hollow particles are of a submicron size with the relative hollow volume V hol : V part. = 0.43 – 0.64. Methods for cationic hollow particle latex preparation by anionic latex recharging with a cationic surfactant or acidic melamine resin are discussed. Recharging with a melamine resin is shown to afford hollow particles with an external polymer shell providing a high thermal stability of the particles.