4,4 -Diaminobenzophenone , polyimides derived

Polyimides derived from 3,3, 4,4 -benzophenone tetracarboxylic acid dianhydride (BTDA), I, and 3,3 -diaminobenzophenone (m,m -DABP), IIA, 4,4 -diaminobenzophenone (p,p -DABP), IIB, or 4,4 -oxydianiline, IIC, (and to which have been added numerous metal compounds) have been prepared. The synthetic procedure em-... 

Fullerene modified polyimide derived from 3,30,4,40-benzophenonetetracarboxylic acid and 3,30-diaminobenzophenone for casted items and its use in tribology, Russian Journal Applied Chemistry, vol. 76, pp. 1156-1163, 2003. 

LARK-TPI developed by NASA is a melt procesable polyimide derived from BTDA and 3,3 -diaminobenzophenone and useful as a high temperature adhesive [1], Characterization of this polyketoimide indicated that the properties of the sample varied according to annealing conditions because of partial crystallization [52]. 

Considerable research effort has been devoted in recent years to the use of chloral derivatives for the synthesis of linear heterocyclic polymers. Of these, the most common are aromatic polyimides [1-12], Many of these polymers have been synthesised from compounds like 4,4 -diaminobenzophenone, and other diamines, which, as demonstrated in the previous chapter, can be obtained from chloral. Polyimides prepared from these diamines were largely synthesised by the conventional two-step procedure [11, 12] involving mild reaction of the diamines with the bis(phthalic)anhydrides, isolation of poly(o-carboxy)amide (PCA) prepolymers, and then processing into products followed by thermal or chemical imidisation [13—16] (Scheme 3.1). Some properties of polyimides prepared from 4,4 -diaminobenzophenone are provided in Table 3.1. 

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