Bulk high-impact polystyrene process, 1 partitions of tert-butyl peroctoate and styrene in blends containing polystyrene and a rubber

In relation to the bulk high‐impact polystyrene process, this work investigates the partition between phases of styrene and an initiator: tert‐ butyl peroctoate. A Flory‐Huggins model was applied for predicting the phase separation point and the partitions of styrene and tert‐ butyl peroctoate. For...

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Bibliographic Details
Published inMacromolecular theory and simulations Vol. 16; no. 7; pp. 703 - 710
Main Authors LUCIANI, Carla V, ESTENOZ, Diana A, MEIRA, Gregorio R, GARCIA, Nancy L, OLIVA, Haydée M
Format Journal Article
LanguageEnglish
Published Weinheim Wiley 25.09.2007
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Summary:In relation to the bulk high‐impact polystyrene process, this work investigates the partition between phases of styrene and an initiator: tert‐ butyl peroctoate. A Flory‐Huggins model was applied for predicting the phase separation point and the partitions of styrene and tert‐ butyl peroctoate. For blends of styrene, polystyrene, and a styrene‐butadiene diblock copolymer, the model provides reasonable predictions of a ternary equilibrium diagram. For blends of styrene, polystyrene, polybutadiene, and tert‐ butyl peroctoate, the partition of tert‐ butyl peroctoate was measured at 25 °C. At emulated conversions of 13% or lower, equilibrium was reached after 1 h of mixing time. For the higher molar masses and conversion of 16%, equilibrium was not reached after 24 h of mixing time. To fit the equilibrium measurements, the solubility parameter of tert‐ butyl peroctoate was adjusted. magnified image
ISSN:1022-1344
1521-3919
DOI:10.1002/mats.200700036