| Summary: | 碩士 === 國立中央大學 === 化學工程與材料工程研究所 === 90 ===
Because segment polyurethane has large, complex construction and special microstructure, so it can react so much property. For this, literature did not have much clear result, make so much people can not know the real property of polyurethane. For to know the property of polyurethane, our laboratory use cis-polybutadiene, ozonolysis crack, uncross by lithium aluminum hydride, react a series different Mn= 700~3400 polyol ---- cis HTPB(Hydroxy terminated polyuretadiene), and use HTPB as soft segment, MDI(4,4-diphenylmethane diisocyanate) and different extender EG; PrD; BD; PeD; HD; DD as hard segment, under 50 wt% hard segment content, react a series linear segment copolymer, than use diamond knife and ultra-microtome to crave about 40 nm slice, than use OsO4 to imbue soft segment, finally use TEM to observe the structure of polyurethane, for this, we can know the physical property of polymer by the change of molecule.
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