Arylenedimethylsiloxane copoly(amic acid)s were synthesized by simultaneous or sequential addition of siloxane-containing and aromatic diamines and also by mixing preliminary synthesized siloxane and aromatic oligomeric homo(amic acid)s bearing terminal amino groups. Corresponding copolyimides were prepared by imidization of copoly(amic acid)s in N,N-dimethylacetamide. The microstructure of the resulting copolymers was studied by C-13 NMR spectroscopy. It is shown that the method of synthesis affects the block length of the forming copoly(siloxaneimide) and its mechanical properties.

It has been shown that the introduction of tautomerizable units of 2,5-bis(ethoxycarbonyl)-1,4-cyclohexanedione and its amino derivatives into the polymer chain leads to a shift of the tautomeric equilibrium and to the appearance of monoenolic or monoenaminic units.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.