Greeting, I am using PCL and IPPDI to produce the Thermoplastic Polyurethane with different ratio. I would like to calculate the amount of PCL and PPDI that need to produce 0.2 and 0.4 ratio of TPU using the polycaprolactonediol (PCL) (of molecular weight Mw,2000 g/ mol) with 1,4-phenylene diisocyanate (PPDI) (mw 14 000 g/mol). I need to clarify the calculation that used. Hope can get the help or explaination from other soon.