ポリウレタン : 構造と物性との相互関係

Abstract

Aliphatic and aromatic polyurethanes were prepared from aliphatic and aromatic diisocyanates, such as hexamethylenediisocyanate (HDI) and 4, 4'-diphenylmethanediisocyanate (MDI), and polyoles of ether and ester typies, such as polytetramethyleneglycol (PTMG) and polycaprolactam (PCL), by the prepolymer method, and then its physical properties, such as tensile test, swelling test, DSC and so on, were measured. These results were compared with the chemical structures calculated by MM2. Aliphatic and aromatic polyurethanes have with pseudo-helix-coil structure, and the structures of aliphatic polyurethanes were linear nearly and the structures of aromatic polyurethanes were alternate crossing structure. The physical properties of aliphatic and aromatic polyurethanes were correspondent with the structures calculated MM2 in expectation.