Hexamethylene diisocyanate , backbone

Another metaflo-supramolecular system, on the basis of 2,6-bis(l,2,3-triazol-4-yl)pyridine (BTP) as well as Zn and Eu ", respectively, was introduced by Weng and coworkers [95], The approach is quite different from the majority of mechanically responsive metaflo-supramolecular polymers heretofore described the ligands were designed to be part of the polymer backbone instead of being located at the end of the polymer chains. Telechelic pTHF was thus copolymerized with the dUiydroxy-functionalized BTP ligand and hexamethylene diisocyanate to produce a polyurethane that was further cross-linked through the addition of metal ions (Fig. 28a). The metal-rich domains phase-separate from the pTHF soft... 

Polycarbamates are polymers with carbamate (formerly urethane) or N-substituted carbamate linkages in the backbone (-NR-C0-0-). Polycarbamates or polyurethanes are prepared by the reaction of dihydric alcohols and diisocyanates, e.g. by reaction of 1,4-butanediol and hexamethylene diisocyanate (see Fig. 2.2.6). The properties depend on the number of CH2-groups. 

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