Tangent Values and Chain Extender Composition

LOSS TANGENT VALUES AND CHAIN-EXTENDER COMPOSITION 

MAXIMUM TEMPERATURETO WHICH STORAGE MODULUS (log F) VALUES WILL REMAIN CONSTANT IN THE CASE OF USING DIFFERENT CHAIN EXTENDERS  

Major relaxations are characterized by a decrease in modulus over a narrow temperature range. Their presence is ascribed to the micro-Brownian motion of the amorphous polyol segments. Relaxation temperatures and magnitudes of tan d are given in Table 3.18a. The a 

Type of chain extender y Transition P Transition a Transition  

UNEVEN MOLAR RATIO EFFECTS WITH RESPECT TO THE 

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