Polycarbonate/polysiloxane (PC-PSiO) block copolymers were synthesized using a novel two-step process. The first step was the synthesis of PC oligomers/polymers possessing allyl-functional end-groups (allyl-PC) using eugenol as an end-capping monomer, triphosgene, and interfacial polymerization. Allyl-PCs were characterized using 1H-NMR, GPC, and MALDI. Variables explored for the synthesis were BPA/eugenol mole ratio, concentration of triphosgene, type of catalyst, and concentration of catalyst. Reaction conditions were optimized to obtain allyl-PCs with complete end-capping and a low concentration of cyclics. In the next step, allyl-PC was reacted with a hydride-terminated polydimethylsiloxane oligomer using hydrosilylation to generate a PC-PSiO multiblock copolymer. PC-PSiO block copolymers were characterized using 1H-NMR, GPC, and AFM. Successful block coupling using hydrosilylation chemistry was demonstrated using GPC. Phase images of these block copolymers produced using AFM showed heterogeneous surface morphologies with spherical nanodomains.

Synthesis and characterization of allyl-functional polycarbonates and polycarbonate/polysiloxane block copolymers

240th National Meeting (2010)

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