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In situ syntheses of a suspension agent based on a styrene–acrylic acid copolymer for the suspension polymerization of styrene
Author(s) -
Vilchis Leopoldo,
Ríos Leonardo,
Villalobos Marco A.,
Guyot Alain
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11122
Subject(s) - copolymer , styrene , suspension polymerization , polymerization , polymer chemistry , acrylic acid , benzoyl peroxide , materials science , suspension (topology) , solution polymerization , chemical engineering , chemistry , composite material , polymer , mathematics , homotopy , pure mathematics , engineering
We carried out the suspension polymerization of styrene, initiated with benzoyl peroxide at 80°C, in the presence of the simultaneous polymerization of acrylic acid in the water phase, initiated by potassium peroxidisulfate (KPS) at the same temperature. The polymerization in the water phase was started at certain times after the beginning of the polymerization of styrene. Then, a continuous addition of KPS was carried out at a given landing rate and during variable feeding times. The water‐phase polymerization actually produced a copolymer of styrene and acrylic acid, which displayed surface‐active properties. The particle size distribution depended on the variables mentioned earlier (starting time, KPS feeding rate, and addition time), being controlled by the molecular weight, and on the composition of the copolymer produced and its availability at the increasing conversion of styrene. A second distribution of submicronic particles was produced. Both families of particles had about the same molecular weight. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 3271–3285, 2002