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- W2048832178 abstract "A theoretical study is carried out on the flexibility of aromatic polyamidoacids and polyimides containing planar cycles connected by different types of joints. It is shown that such polymer chains may be considered as a sequence of linear links joined at some angles with free rotation about the links. An expression for the mean square end-to-end distance for some types of these chains is given. An experimental investigation of the flexibility of some polyamidoacids obtained by polycondensation is also performed. The intrinsic viscosity is measured in θ-solvent. The molecular weight is determined by light scattering. The agreement between experimental and theoretical values of (h02/M)1,2 for polyaminoacids is satisfactory thus justifying the use of the suggested theoretical approach for study of the flexibility of insoluble polyimides." @default.
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- W2048832178 date "1977-01-01" @default.
- W2048832178 modified "2023-10-16" @default.
- W2048832178 title "Flexibility of aromatic polyimides and polyamidoacids" @default.
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- W2048832178 doi "https://doi.org/10.1016/0014-3057(77)90098-2" @default.
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