How the polyol molecular weight affects the viscosity of the prepolymer ?

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Edwin A. Murillo

Are you talking in the synthesis of polyurethanes or in general??

Şahin ÖZTÜRK

for synthesis of prepolimer adhesive.

Hatsuo Ishida

Since I do not know what is the terminal group structure of your molecule, I can only give you general information. The relationship between the log (viscosity) (y-axis) and log (molecular weight)(x-axis) has a slope of 1 when the molecular weight is less than the entanglement molecular weight. If the molecular weight is beyond the entanglement molecular weight, the slope is 3.4.