α-Substituted diisopropylbenzene hydroperoxides for low-temperature SBR polymerization

Autor:	Richard A. Nathan, W. J. Mueller, Bailey Bennett
Rok vydání:	1973
Předmět:	chemistry.chemical_classification Reaction rate Viscosity Natural rubber Polymerization Chemistry visual_art Polymer chemistry visual_art.visual_art_medium Organic chemistry Polymer Mooney viscosity Physical property
Zdroj:	Journal of Polymer Science: Polymer Chemistry Edition. 11:1589-1600
ISSN:	1542-9369 0360-6376
DOI:	10.1002/pol.1973.170110709
Popis:	Four pure hydroperoxides were evaluated as initiators for the polymerization of styrene–butadiene rubber (SBR) at 5°C. These materials were the meta and para isomers of mono- and dihydroperoxy-diisopropylbenzene. Results showed that the monohydroperoxides produced somewhat faster reactions than a control hydroperoxide, p-menthane hydroperoxide. Response to mercaptan level adjustments was good, providing polymer with a Mooney viscosity in the 50 to 60 range. The reaction rate with the dihydroperoxides was slower, but again provided polymer with a satisfactory viscosity. Basic physical property measurements on polymers prepared with the pure hydroperoxides or control hydroperoxides showed only minor differences. It is anticipated that these differences can be eliminated by small adjustments in the compound recipe.
Databáze:	OpenAIRE
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