FIELD: chemistry.
SUBSTANCE: citraconic anhydride and itaconic anhydride are used as molecular weight control agents in binding and hardening reactions during formation of a polyamide acid oligomer and polyimide oligomers. The invention also relates to obtaining prepregs and high-temperature adhesives made from the said oligomers, as well as high-temperature composites with low void volume.
EFFECT: pure two-step hardening.
11 cl, 25 ex, 8 tbl
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