Polydimethylsiloxane/polyether-mixed macrodiol-based polyurethane elastomers : biostability
作者： Darren J Martin , Laura A Poole Warren , Pathiraja A Gunatillake , Simon J McCarthy , Gordon F Meijs
DOI: 10.1016/S0142-9612(99)00271-9
关键词: Polydimethylsiloxane 、 Polyurethane elastomer 、 Subcutaneous implantation 、 Composite material 、 Elastomer 、 Polymer 、 Ultimate tensile strength 、 Materials science 、 Polyurethane 、 Thermoplastic polyurethane
摘要: A series of four thermoplastic polyurethane elastomers were synthesized with varying proportions poly(hexamethylene oxide) (PHMO) and poly(dimethylsiloxane) (PDMS) macrodiols. The macrodiol ratios (by weight) employed (% PDMS:% PHMO) 100:0, 80:20, 50:50 20:80. weight fraction in each polymer was fixed at 60%. mixed macrodiols reacted 4,4'-methylenediphenyl diisocyanate (MDI) 1,4-butanediol (BDO) chain extender. biostability these polymers assessed by strained subcutaneous implantation sheep for three months followed microscopic examination. Pellethane 2363-80A 2363-55D as control materials. mechanical properties the tested discussed along results. results showed that soft, flexible PDMS-based polyurethanes very promising can be successfully produced using approach. formulation 80% PDMS best result terms a combination flexibility, strength biostability.
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