Volume fraction morphological measurements

Example. Although the surface area itself very often represents a desirable information about the system morphology, it can sometimes be used as a measure of the characteristic lengthscale in the system. Thus, if the volume fraction of the domains (/m) separated by the surface is constant (or nearly constant), the following geometrical relation holds regardless of the domain size and arrangement ... 

For completeness DiCorleto and Cohen also examined the effect of aging on craze growth in low volume fraction PB diblocks of spherical morphology which craze according to the meniscus instability mechanism As expected from the work of Kefalas and Argon on homopolystyrene, aging had also no measurable effect on craze velocities in this case as well. 

The reference used for the heat capacity calculation was a 12.7 mm thick specimen of pyroceram. The reference sample also coated with thin layer of graphite before the measurement was performed. The thermal conductivity of MWCNTs reinforced TPNR matrix composites of all volume fractions studied from 30 °C to 150 °C. Morphology of the MWCNTs and the composite were examined by scanning electron microscope (Philips XL 30). The samples were coated with a thin layer of gold to avoid electrostatic charging during examination. 

In practice, the two cellular morphologies can co-exist so that polymer foam is not always completely open or closed cell. The volume fraction of closed cells has a considerable influence on the mechanical properties of these systems so it is an important structural characteristic. Ways to characterise and measure morphology that affects the solid and heat radiative contributions in closed cell foams have been recently developed [4]. 

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