FIELD: polymers structure defectiveness determination. SUBSTANCE: polyimides imidezation degree is determined using preliminary hydrolysis of polyimide sample in alkaline medium till monomers are formed, from which using hydrochloride acid methylamine is neutralized. Unreacted radical of hydrochloride acid titrate back using solution of caustic soda. According to difference of reacted and unreacted hydrochloride acid volumes they determine amount of fixed amide solvent and according to share of it in polyimide cyclization degree is calculated. EFFECT: improved determination of polyimides cyclization degree.
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