The influence of composition ratio on the morphology of biomedical polyurethanes

@inproceedings{Martin1999TheIO,
  title={The influence of composition ratio on the morphology of biomedical polyurethanes},
  author={Darren J. Martin and Gordon Francis Meijs and Pathiraja A. Gunatillake and Setrig P. Yozghatlian and Gordon M. Renwick},
  year={1999}
}
Two series of thermoplastic polyurethane elastomers were synthesized from 4,4′-methylenediphenyl diisocyanate (MDI), 1,4-butanediol (BDO) chain extender, and each of poly(tetramethylene oxide) (PTMO) and poly(hexamethylene oxide) (PHMO) macrodiols. The PTMO and PHMO molecular weights were kept constant at 993 and 852 g/mol, respectively. In the PTMO-based series, the composition ratio was varied between 48 and 58% (w/w) of macrodiol; 2 commercially available PTMO-based polymers were also… CONTINUE READING