RAFT Copolymerization of Styrene/Divinylbenzene in Supercritical Carbon Dioxide
2012; CSIRO Publishing; Volume: 65; Issue: 8 Linguagem: Inglês
10.1071/ch12291
ISSN1445-0038
AutoresGabriel Jaramillo‐Soto, Eduardo Vivaldo‐Lima,
Tópico(s)Phase Equilibria and Thermodynamics
ResumoAn experimental study on the kinetics of the reversible addition–fragmentation chain transfer (RAFT) dispersion copolymerization with crosslinking of styrene and divinylbenzene in supercritical carbon dioxide (scCO2) is presented. This is the first time that such a controlled polymer network synthesis is carried out in scCO2. S-Thiobenzoyl thioglycolic acid (TBTGA) and dibenzoyl peroxide were used as RAFT agent and initiator, respectively. The polymerizations were carried out in a high pressure cell with lateral sapphire windows at 80°C. The effect of RAFT agent concentration, including the case without RAFT controller, on polymerization rate, molecular weight development, gel fraction, swelling index, and particle morphology was analysed.
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