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The effect of structural inhomogeneities on the equilibrium flexibility of rigid-chain aromatic polymers containing complex condensed cycles in the main chain has been studied. The non-flatness of complex condensed cycles leads to a significant decrease in the equilibrium flexibility of rigid-chain polymers based on them and, consequently, to a deterioration of their mechanical properties. It is shown...
The dependence of the glass transition and initial decomposition temperatures of polyperyleneimide and polynaphthylimide on the conformational rigidity was studied by the Monte Carlo, Kuhn segment, and quantum chemical AM1 methods. The corresponding linear plots can be used for estimation of the glass transition and initial decomposition temperatures when experimental determination is difficult.
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