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Bulk High‐Impact Polystyrene Process, 1
Author(s) -
Luciani Carla V.,
Estenoz Diana A.,
Meira Gregorio R.,
García Nancy L.,
Oliva Haydée M.
Publication year - 2007
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.200700036
Subject(s) - polystyrene , styrene , polybutadiene , copolymer , hildebrand solubility parameter , molar mass , materials science , partition equilibrium , thermodynamics , polymer chemistry , solubility , mixing (physics) , phase diagram , ternary operation , flory–huggins solution theory , chemistry , phase (matter) , equilibrium constant , polymer , organic chemistry , composite material , physics , quantum mechanics , computer science , programming language
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.