FIELD: chemistry.
SUBSTANCE: invention relates to fibre precursor for carbon fibres, carbon fibre and a method of its production. Fibre precursor of carbon fibre contains a polymer of general formula (1): 
(1), where Ar1 is an aryl group, expressed by any structural formulae (1)-(5), and Ar2 is an aryl group, expressed by structural formula (6) or (7), except a combination, where Ar1 is a group, expressed by structural formula (3), and Ar2 is a group, expressed by structural formula (6), and combination, where Ar1 is a group, expressed by structural formula (1), and Ar2 is a group, expressed by structural formula (6): 
.
EFFECT: technical result is obtaining carbon fibre with excellent mechanical strength without non-fusible treatment.
8 cl, 10 dwg, 1 tbl, 2 ex
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