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A polymerized ionic liquid diblock copolymer (PILBCP-TFSI), poly(MMA-b-MUBIm-TFSI), consisting of an ionic liquid monomer, (1-[(2-methacryloyloxy)undecyl]-3-butylimidazolium bis(trifluoromethane)sulfonamide) (MUBIm-TFSI), and a non-ionic monomer, methyl methacrylate (MMA), was synthesized via reverse addition fragmentation chain transfer polymerization followed by anion exchange metathesis. Free standing,...
Using first-principles calculations, we find that the electronic structures of PBT, OH-PBT, OH-PBI, and OH-PBI(N) rigid-rod polymers are very different from those of conventional semiconductors. The close agreement between calculated excitation energies and the observed features in the ultraviolet-visible (UV-Vis) absorption spectra enables us to identify that the major features in the UV-Vis absorption...
We examine the effect of polymer molecular weight on two-stage weight uptake kinetics in concentrated polymer solutions just below the glass transition. New results are reported for ethylbenzene sorption in two monodisperse polystyrenes (M = 100 000 and 350 000). The two-stage sorption data were fitted with a linear model coupling diffusion and viscoelasticity. A data-fitting scheme is described,...
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