| 摘要 |
High performance composites can be made from linear or multidimensional oligomer or blends that include unsaturated hydrocarbon crosslinking functionalities linked to a pyrimidine radical on the terminal ends of the polymeric backbones of the oligomers. The oligomers are made by condensing pyrimidine-based end-cap monomers of the formula: <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> wherein R1=lower alkyl, lower alkoxy, aryl, aryloxy, substituted alkyl, substituted aryl, halogen, or mixtures thereof; j=0, 1, or 2; G=-CH2-, -O-, -S-, -SO-, -CO-, -CHR-, -CR2-, or -SO2-; T=methallyl or allyl; Me=methyl; and R=hydrogen, lower alkyl, or phenyl, with suitable polymeric precursors.
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