of the copolymerization of CO 2 and epoxides by diethyl zinc a number of efficient transition metal catalysts functioning by coordinative chemistry have been developed: in the latter case the polymerization occurs by coordination of the epoxide monomer, followed by successive insertions of epoxides and CO 2 until a transfer reaction takes place producing aliphatic polycarbonate chains. Hadjichristidis, Macromolecules 2017, 4,ĥ PLENARY ORAL ANIONIC COPOLYMERIZATION OF CO 2 WITH EPOXIDES AS A NEW APPROACH FOR THE SYNTHESIS OF POLYCARBONATES Yves Gnanou Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia Carbon dioxide (CO 2 ) is an abundant, inexpensive, and non-toxic renewable C1 feedstock that is only used in a limited number of product-yielding reactions due to its low reactivity. Hadjichristidis, ACS Macro Letters 2016, 5, D. The first exploratory TEM results showed the tremendous influence of the cyclic structure on the microphase separation of co/terpolymers 1,5 1 G. Representative examples are given in Scheme 1. In addition, by combining polyhomologation 2, Diels-Alder and click chemistry, we were able to synthesize polyethylene-based ring and tadpole homo/copolymers 3,4.
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The general approach involves the synthesis of the corresponding OH-terminated precursors (linear and star), transformation of the OH to alkyne groups, by esterification with pentynoic acid and subsequent intramolecular ring closure using Glaser coupling under high dilution conditions 1.
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Zoumpoulakisģ Recent Developments in Polymer Synthesis and Characterization MethodsĤ PLENARY ORAL RING-BASED MACROMOLECULAR ARCHITECTURES: THEIR IMPORTANCE IN POLYMER PHYSICS Nikos Hadjichristidis King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, Saudi Arabia A straightforward strategy for the synthesis of ring-based homo/co/terpolymers of styrene, isoprene and 2-vinyl pyridine, will be discussed.