Final melting temperature

As a further check on the validity of linear CTE data extrapolation through the nematic transition, equation (3) in the theory section was applied using the volumetric CTE for neat 300 series resin (Table I, entry 3). Here an initial room temperature (21 C) specific volume of 0.7194 cc/gm was assumed along with a final melt temperature of 360 C. Equation (3) gave an extrapolated melt specific volume of 0.787 cc/gm vs an actual measured value of 0.805 cc/gm from Figure 8. Thus, the volumetric CTE extrapolation appears to be reliable, but further melt specific volume data from other LCP formulations will be needed to verify this. 

The first number is the total number of homogenization temperatures and the number following the slash gives the number of final melting temperatures. Sources which only reported the range of fluid inclusion temperatures are indicated by r . 

Salinity estimates based on final melting temperatures (T ) of frozen inclusions in saddle dolomite are not significantly affected by re-equilibration processes. values are less frequently reported than Th measurements (cf. 1119 versus 404 values Figs 10 and 11), and most studies do not specify whether the final melting phase was ice or hydrohalite. values range from -4.9 to -42.5°C,... 

Fig. 11. Frequency histogram of final melting temperatures of primary fluid inclusions in saddle dolomite. Data from Coniglio Williams-Jones (1992) are mostly from inclusions of secondary or indeterminate origin and are shown for comparison. Horizontal arrows indicate literature sources that reported a range of values only. The upper x axis gives an expression of the measured temperatures as wt% NaCl eq., based on a pure H20-NaCl system (after Bodnar, 1993). The composition of seawater is indicated by the vertical dashed line (Tn, = -2.1 °C). The range of values in Shelton et al. (1992) include data from saddle dolomite and from other epigenetic dolomite varieties.

Final melting temperatures of ice are usually much more useful data because they can be used to calculate the salinity of fluid inclusions. With no knowledge of the major ion chemistry of fluid inclusions, we can assume a simple NaCI-H20 system and calculate the salinity of fluid inclusions from the equation (Goldstein Reynolds, 1994) ... 

Thermal properties (final melting temperature and secondary transition temperature T ), density at 23°C, crystalline volnme fraction, oq, and tensile modnlus at 23°C, of hydrogenated polybutadime samples were reported by Krigas et al. (1985) ... 

Several materials were blended with PVC and properties of blends were compared with effect of plasticization by DOP. These included nitrile rubber, NBR, poly(ethylene-co-vinyl acetate), EVA, and poly(ethylene-co-vutyl aciylate-aciylate), Ac. Increase in plasticizer concentration (DOP) normally reduces torque and final melt temperature of blend but this is not the case when NBR replaces plasticizer. EVA behaves in a similar... 

Fig. 7.5. SALS patterns Hv and IV) during isothermal crystallization of EH064 at different crystallization temperatures. From DSC, the peak melting temperature (T ) and final melting temperatures T ) of the sample are = 95""C, =...

Figure 11.1 Final melting temperatures of ethylene copolymers as a function of branch content ethylene copolymers containing methyl (open circles), ethyl (open square), and n-propyl (solid triangles) branches hydrogenated polybutadiene (open triangles) ethylene-vinyl acetate (solid circles). Dashed line represents Flory s equilibrium theory for random copolymers (p = Xa), as given in Equation (11.2). Reprinted with permission from Reference [12]. Copyright 1984, American Chemical Society.

In the context of this discussion, solid-state deformation will encompass any orientation that takes place at temperatures below the final melting temperature of the polymer. Such deformation may be imposed on samples that are initially isotropic or anisotropic. During commercial forming processes, such deformations are usually taken to the point at which a stable morphology is formed, i.e., beyond the yield point. For a general description of the macroscopic phenomena associated with solid-state deformation, the reader s attention is directed to the section on mechanical properties in Chapter 5. 

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