| 초록 |
Polyurethaneurea materials have been widely used in many products due to the diversity of the properties and processing technologies. Polyurethaneurea consists of hard and soft segments. The hard segments are generally urethane groups reacted with aromatic diisocyanate and the chain-extender with low molecular weight diol or urea groups reacted with aromatic diisocyanate and the chain-extender with low molecular weight diamine. In this study, polyurethaneurea were synthesized from 4,4′-methylene diphenylene diisocyanate, ethylenediamine, 1,2-diaminopropane, diethylenetriamine, diethylamine and polytetramethylene ether glycol with various molecular weights of 1500, 1800 and 2000. The segmental orientation behaviors have been studied mainly with the infrared spectroscopy. Physical properties of polyurethaneurea were studied by utilizing DMA, and mechanical properties. |
