THE SYNTHESIS OF PRECISELY STRUCTURED POLYURETHANES .2. CHAIN BUILDING METHODOLOGY

The development of methodology to construct polyurethanes of precise s tructure is described, A linker, 4-hydroxymethylphenol, is attached to the Merrifield resin and monomers OCN-M(x)-OTBDPS (where M(x) = aryl or diarylmethane core; TBDPS = Bu'Ph(2)Si) are coupled sequentially vi a a dibutyltin dilaurate catalysed process, At each stage, chain cleav age and product distribution analysis allows optimisation of oligomer synthesis.