| 摘要 |
<p>1. carboxylic anhydrides of the structure: where x = 1 or 2, B = an organic group, free from N, containing 6 - 13C and having a valency of x + 2n, C2O3 = anhydride groups with carbonyl C bonded directly to aromatic C or B, n = 1 or 2. 2. Substantially linear polyarylsulphone thermoplastic polymers (II) containing in their main chain carboxylic anhydride groups from (I). 3. Preparation of (II) by heating, in the presence of an acid catalyst, a monomer of (III) or (IV) (III) HxR(SO2X)where H is hydrogen; X is halogen, R is an aromatic group; z is an organic group, mainly aromatic; n = 1 or 2; x = 0 - 2; y = 0 - 2.</p> |
