PROPERTIES OF POLYURETHANE ELASTOMERS PREPARED FROM 1,1’-ISO-PROPYLIDENE BIS（p-PHENYLENE-OXY） DI-PROPANOL-2, A POLYETHER （OR POLYESTER）. AND 4, 4’-DIPHENYLMETHANE DIISOCYANATE （MDI） BY ONE-STEP REACTION METHOD

摘要

＜正＞ Two new types of block polyurethane elastomers were prepared using two polyols polyethyleneadipate and PTHF respectively, and diisocyanate MDI extended with Dianol-33 （a new extender）,by one step reaction and casting method. The properties of these polyurethane were studied by employing Instron infrared spectroscopy,DSC and wide angle X-ray diffraction etc.