IQUIR   05412
INSTITUTO DE QUIMICA ROSARIO
Unidad Ejecutora - UE
artículos
Título:
Emulsion Polymerization of Styrene with Iso-Octyl-3-Mercaptopropionate as Chain Transfer Agent
Autor/es:
MINARI, R.J.; VEGA, J.R.; GONZALEZ SIERRA, M.; MEIRA, G.R.; GUGLIOTTA, L.M.
Revista:
JOURNAL OF APPLIED POLYMER SCIENCE
Editorial:
Wiley Periodicals Inc.
Referencias:
Año: 2008 vol. 109 p. 3944 - 3952
ISSN:
0021-8995
Resumen:
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Four batch and unseeded emulsion
polymerizations of styrene were investigated, which included isooctyl 3-mercaptopropionate
(iOMP) as chain transfer agent (CTA). This compound was analyzed by 13C NMR and GC/ MS, resulting
in a mixture of over 10 isomers. Because of different reactivities of the CTA
isomers, the produced polystyrenes presented broad and bimodal molecular weight
distributions (MWDs). A mathematical model was adjusted to the measurements,
and the measured MWDs were adequately predicted when assuming the CTA as a
binary mixture of high but different reactivities. _ 2008 Wiley Periodicals, Inc. J Appl
Polym Sci 109: 39443952, 2008