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- W2383437459 abstract "Based on aliphatic alcohol, alcohol amine and amine, a new mixed expander (NB) for polyurethane prepolymer was prepared. This expander is very useful for rapid solidification medical polyurethane materials without carcinogenic ingredient. Taking a commercially available expander(MB), which is mainly composed of 4,4'|methylene|bis(2|chloroaniline)(MOCA), as a reference, the reactions of the both expanders and polyether|based polyurethane prepolymer were traced by IR and GPC. Both systems showed similar solidification time, but the material based on NB, or N|PU, have a better initial fluidity, which is convenient for clinical operation. The reactive degree of isocyanate groups is higher in N|PU than in M|PU(material based on MB). The average molecular weight of N|PU is much higher than that of M|PU. The stress|strain curves of the material of N|PU and M|PU behaved like “C” and reverse “S” type respectively. N|PU does not show obvious creeping phenomenon and is less rigid. Environmental adaptability of both materials is the same. Therefore, NB is suggested to be a substitute for MB." @default.
- W2383437459 created "2016-06-24" @default.
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- W2383437459 date "2001-01-01" @default.
- W2383437459 modified "2023-09-25" @default.
- W2383437459 title "A Rapid Room-solidification Reaction of Expander and the Prepolymer for Medical Polyurethane and Its Properties" @default.
- W2383437459 hasPublicationYear "2001" @default.
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