Mobility Factor to Quantify Degree of Vitrification

To quantify the degree of vitrification for conditions for which the reacting network is in between the glassy and the liquid or rubbery state, a mobility 

The equation states that variations in heat capacity, Cp, are normalised between unity for the liquid or imrestricted state (with heat capacity Cpi), and zero for a frozen glassy state (with heat capacity Cpg). The evolution of this factor should mirror the reduction of mobility due to vitrification only, and not the changes in heat capacity due to changes in temperature or to the chemical changes themselves. Therefore, the influence of both temperature and conversion on the reference states, Cpi and Cpg, needs to be taken into account to obtain quantitative results. 

The evolution of the mobility factor based on experimental heat capacity curves shown in sections 5.4 and 5.5 will be used for modelling the cure process and the results will be given in section 6.2. 

9 HEAT CAPACITY CHANGE AS A RESULT OF REACTION BEFORE VITRIFICATION 

If the (specific) heat capacity of the products formed differs Ifom the heat capacity of the reagents consumed, the heat capacity will gradually change with reaction conversion. 

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