Semiautomated Parallel RAFT Copolymerization of Isoprene with Glycidyl Methacrylate
2019-11-01T20:29:23Z (GMT)
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Copolymerization
of isoprene (IP) with glycidyl methacrylate (GMA)
was performed under RAFT (reversible addition–fragmentation
chain-transfer) polymerization conditions in a platform for high-output
experimentation. Covering the range between 1 and 0.2 molar fraction
of IP in the feed, four sets of reactions were carried out at 10,
15, 20, and 30 h at 115 °C. The kinetic data obtained were used
to estimate the reactivity ratios using a nonlinear least-squares
approach (NLLS). Reactivity ratios rGMA = 0.61 and rIP = 0.74 indicate that
both monomers tend to crosspropagate in agreement with known literature
values. Concerning the RAFT study, relatively good control and livingness
of the copolymerization was observed except for the experiment in
which IP represents 20 mol % in the feed. 1H NMR characterization
confirmed the presence of both monomers in the final copolymer, particularly
the presence of the epoxy ring of GMA which is susceptible to post
polymerization reactions. Finally, preliminary results on the hydrogenation
of various polymers are discussed.
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