English Abstract

Science and Technology of Polyurethanes was the Polyurethane Understood in How Far?
IV Progress of mechanical properties of polyurethanes
Molecular Design of Polyurethanes

Mutsuhisa FURUKAWA
The Emeritus Professor of Nagasaki University, Institute of Nagasaki Polyurethane Science and Technology, Chuo-ku, Fukuoka, Japan
Nippon Gomu Kyokaishi,(2019),92(1),31-37 General Review in Japanese

Polyurethanes (PUEs) are multi-blocked-copolymers synthesized with isocyanates, polyols and curing agents as glycols or diamines. PUEs can be freely designed due to the diversity of the chemical structure, blending and reaction of raw materials.
In the development of novel polyurethanes, it is important to control the higher order structure, that is, the micro-aggregation structure in addition to the primary structure (chemical structure) of polyurethanes. The structure control factors of polyurethane will be described here.

Keywords: Molecular Design Factor, Aggregation Control, Recipe Ratio, Temperature Control of Polymerization and Molding, Molecular Distribution