2009/05/01 by Nikolai Tsvetkov, Larisa Andreeva, Tsvetkov, Nikolai +16
Materials Science · Physics and Astronomy · #Dendrimers and Hyperbranched Polymers #Luminescence and Fluorescent Materials #Synthesis and properties of polymers #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.0905.0153
16 pages, 8 figures, Proc. 4th All-Russian Kargin Conference (Moscow State University, 2007), Vol. 3, 65
arxiv created 2009/05/01 · arxiv updated 2009/12/01
Linear polymers with dendrons of first and second generations based on L-aspargic acid are studied by the methods of flow birefringence and electric birefringence. Optical, dipole, dynamic, and conformational properties of the macromolecules, as well as contributions to their optical anisotropy due to macroform and microform effects, are investigated. The polymers are found to possess permanent electric dipole moments and undergo reorientation in external electric and hydrodynamic fields according to large-scale rotation mechanism. A significant growth in equilibrium rigidity, optical anisotropy, and dipole moment of monomer units is observed when rigid benzamide fragments are introduced into the dendrimers. The backbone conformation of second-generation dendrimers containing such fragments is shown to be well described by generalized wormlike chain model.