Table 1. Chemicals for Synthesis of Polyester Polyol and Polyurethane

Name	Abb.	Structure	Mw (g)	Supplier
1,3-Propanediol	1,3-PD		76.10	Daejung Co.
Azelaic acid	Emerox 1144		188.22	Emery Oleochmeicals
Isosorbide			146.14	Covestro Chemical
4,4’-methylenebis (phenyl isocyanate)	MDI		250.25	Dongyang Chemical