Abstract
Samples of graft-copolymers with polyimide backbones and poly(methyl methacrylate) side chains synthesized by ATRP of methylmethacrylate on polyimide macroinitiator are investigated by 1H NMR, GPC, static and dynamic light scattering, sedimentation, and viscosimetry in chloroform and ethyl acetate solutions. Hydrodynamic and conformational behavior of graft-copolymers is well-described by the wormlike spherocylinder and Porod wormlike chain models. Samples of graft-copolymers have high equilibrium rigidity, the Kuhn segment length grows from 20 to 95 nm with the lengthening of side chains. The equilibrium rigidity and hydrodynamic diameter of the investigated graft-copolymers depend on the molar mass M of side chains as M 0.7.
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The financial support was given by the Russian Science Foundation (project 14-13-00200). The authors are grateful to Prof. Axel H. E. Müller and Dipl. Ing. Marietta Böhm (Macromolecular Chemistry 2, University of Bayreuth, Germany) for GPC measurements.
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Filippov, A.P., Krasova, A.S., Tarabukina, E.B. et al. The effect of side chain length on hydrodynamic and conformational characteristics of polyimide-graft-polymethylmethacrylate copolymers in thermodynamically good solutions. J Polym Res 23, 219 (2016). https://doi.org/10.1007/s10965-016-1111-5
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DOI: https://doi.org/10.1007/s10965-016-1111-5