RAFT Copolymerization with Crosslinking of Methyl Methacrylate and Ethylene Glycol Dimethacrylate in Supercritical Carbon Dioxide
2013; Taylor & Francis; Volume: 50; Issue: 3 Linguagem: Inglês
10.1080/10601325.2013.755435
ISSN1520-5738
AutoresGabriel Jaramillo‐Soto, Cindy M. Villa-Ávila, Eduardo Vivaldo‐Lima,
Tópico(s)Organometallic Complex Synthesis and Catalysis
ResumoAn experimental study on the kinetics of the reversible addition-fragmentation chain transfer (RAFT) copolymerization of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDMA) in supercritical carbon dioxide (scCO2) at 65°C and 172 bar is presented. Azobisisobutyronitrile (AIBN) was used as initiator, S-Thiobenzoyl thioglycolic acid as RAFT agent, and Krytox 257 FSL (Dupont) as stabilizer. A 38 mL, high pressure view cell, equipped with one frontal and two lateral sapphire windows, was used as the reacting vessel. The effect of RAFT agent concentration on polymerization rate, molecular weight development, gel fraction, swelling index and particle morphology was analyzed.
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