Zero pressure volume

Figure 4 shows that, for reaction 5 with M = Co or Cr, the zero-pressure volume of activation correlates with the... 

A The unit cell volume for molecular N2O4 (isomer of N0 03 ) has been determined by single crystal diffraction at -40 °C and ambient pressure [83]. The results gave 78.18 A / molecule, 18% larger than the fitted zero-pressure volume for NO N03 obtained here. Moreover, NO Os is denser than the assemblage at all pressures studied here. The cell volume of O2 determined by single crystal x-ray diffraction measurements by Johnson et al. 

Table XI. Comparison of the calculated and measured transition volumes (V ) of the diamond and 3 phases, their ratios (V /V ), and the transition pressures (P,-) for Si and Ge. Volumes are normalized to the measured zero-pressure volumes. (from Ref. 21)...

Fig. 9. Calculated and measured values of the zero-pressure volume vs temperature, for fluid sodium. 

Isobaric specific volume versus temperature curves are shown in Figure 1 for Kapton HN, PI-2540, Upiloc S and PI-2611. The temperature dependent volume at zero pressure V(0,T) was obtained fi-om an extrapolation of the Tait equation fit to the 10 to 50 MPa data. The V(0,T) data were fit with a second order pofynomial. The coefficients for the zero pressure volume, V(0,T), and the Tait parameter, B(T), for each film are listed in Table 1. 

Table 1. Zero Pressure Volume Vo(T) and Bulk Modulus Bo T) VI-595...

The zero pressure volume, Vq. nd modulus, Bq, are additionally required to complete Eqs. (A3) and (A5). The compilation of these parameters are shown in Table 1. In this table, the abbreviation of polymer names are used. The explanation of the abbreviated names and experimental T-P range are listed in Table 2. Several types of fitting functions are used for Vq. Typically used are. the polynomial and exponential expressions. For the bulk modulus, the exponential dependence on temperature is almost exclusively used. Some other polymer PV T data that are not used to obtain the characteristic parameters can be found in the literature, including blends and liquid crystalline polymers (38,50,55,59-67). 

Sanchez-Cho (S-C) Equation of State The Sanchez-Cho equation of state (32) was formulated by combining the empirically observed temperature dependence of the zero pressure volume Vo and modulus Bq with the isothermal Fade equation, Eq. (A3) ... 

TABLE 1. ZERO PRESSURE VOLUME (Vo(T)) AND BULK MODULUS Bo(T))... 

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