NOVELTY - Polymer (A) comprising at least one dibenzodiazocine containing recurring unit (I), is new.    USE - (A) are useful: in shaped articles and shaped parts of article (claimed) including radios, television sets and computers and electrical wiring coating; as dielectrics in electronic and optoelectronic applications (including printing wiring boards, semiconductors, and flexible circuitry); in electromechanical actuating devices, medical devices, sensing devices, free-standing films, fibers, foams, medical implements, non-woven fibrous materials, separation membranes (including gas separation membranes), semi-permeable membranes, ion exchange membranes, fuel cell devices, photoluminescent and electroluminescent devices; and in electronic adhesive applications (including lead-frame adhesives and aircraft interior applications).    ADVANTAGE - (A) has high glass transition temperature, thermal stability, flame resistance, chemical resistance and melt processability.    DETAILED DESCRIPTION - Polymer (A) comprising at least one dibenzodiazocine containing recurring unit of formula (-A1-B1-C1-D1-) (I), is new.    A1, C1 = -C(=O)-NH- or -C(=O)-NH-C(=O)-;    B1 = 4-50C hydrocarbon group, 12-50C groups of formula (a1)-(a3) (where the unassigned positioned isomer is either meta or para to Q) and/or dibenzodiazocine-containing divalent group;    Q = 0-38C divalent group containing at least one heteroatom; and    D1 = dibenzodiazocine-containing divalent group.    INDEPENDENT CLAIMS are also included for:    (1) a method for preparing a polymer comprising dibenzodiazocine group(s), comprising reacting in a polycondensation reaction at least one set of monomers (S1), (S2), (S3) or (S4), where S1 comprises at least one monomer of formula (X1-D1-X1) (II) and at least one monomer of formula (Y1-B1-Y1) (III), S2 comprises at least one monomer of formula (X1-B1-X1) (IV) and at least one monomer of formula (Y1-D1-Y1) (V), S3 comprises a monomer of formula (X1-D1-Y1) (VI) and a monomer of formula (X1-B1-Y1) (VII), and S4 comprises monomer (VI);    (2) polymer compositions containing at least one polymer (A), and the polymers prepared by the method;    (3) shaped articles or shaped parts of article containing at least one of the polymer composition, or containing at least one polymer (A) and the polymers prepared by the method;    (4) a monomer of formula (G1-D2-G1) (VIII);    (5) polymer preparable by polymerizing the monomer (VIII); and    (6) method for preparing a polymer which comprises polymerizing the monomer (VIII).    X1 = amino;    Y1 = carboxyl and/or anhydride;    D2 = dibenzodiazocine-containing divalent group of formula (b1)-(b30); either    R1-R8 = alkyl or (hetero)aryl (both optionally substituted), H, halo, -CN, -CHO, -COR1a, -CR1a=NR1b, -OR1a, -SR1a, -SO2R1a, -POR1aR1b, -PO3R1a, -OCOR1a, -CO2R1a, -NR1aR1b, -N=CR1aR1b, -NR1aCOR1b, -R1aOR1b, -CONR1aR1b; and    R1a, R1b = alkyl, (hetero)aryl (all optionally substituted), or H; or    at least two of R1-R8, R1a, or R1b = may or may not be linked to form a ring structure;    Z, Z1 = divalent group (optionally substituted) or a direct bond; and    G1 = reactive radical including OH, halo, carboxyl, nitro, amino or anhydride.    Provided that when G1 represents OH, halo or nitro, then Z and/or Z1 is aryleneoxyarylene.