Bulk High-Impact Polystyrene Process, 1 : Partitions of tert-Butyl Peroctoate and Styrene in Blends Containing Polystyrene and a Rubber
✍ Scribed by Carla V. Luciani; Diana A. Estenoz; Gregorio R. Meira; Nancy L. García; Haydée M. Oliva
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 196 KB
- Volume
- 16
- Category
- Article
- ISSN
- 1022-1344
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✦ Synopsis
Abstract
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.
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