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Chemical bond formation between polyester and a functional polymeric additive was tried by using multifunctional isocyanate (MFI) as a crosslinking agent. Reactions between desipramine, which is monomer unit of functional polymeric additive, and MFI afforded generation of the corresponding urea type compounds. Accordingly, desipramine-containing copolymers (PAzep-Fl) were prepared as fluorescence functional additives. Chemical bond formations between polyester and PAzep-Fl via MFI were achieved by using liquid type poly( ε-caprolactone) (PCL) as a polyester. The GPC analyses of the composites suggest that chemical bonding occurs between PCL and PAzep-Fl via MFI. The fluorescence ë max of the composites had almost the same wavelength as that of chloroform solution of PAzep-Fl. These results suggest that the fluorescent function of PAzep-Fl is maintained even when a chemical bond is formed between polyester and PAzep-Fl via MFI. 【298】 Fig. 1 Chemical structure of polymers containing diphenylamine with a bridged structure.( 92 ) 【305】

The reaction of polyureas, prepared from the conventional diisocyanates and the α,ω-diaminopolyoxyalkylenes, with pyromellitic dianhydride in N-methyl-2-pyrolidone (NMP) at 165 °C leads to the formation of polyimide elastomers. The polyimide elastomers exhibited excellent physical properties.

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