PVT Behavior of Polymers.

PVT Properties of Polymers for Injection Molding

PVT (Pressure-Volume-Temperature) properties of polymers are important for both engineering and polymer physics. Fig.1 shows the typical PVT diagrams of an amorphous (a) and semi-crystalline polymer (b). PVT diagram describes the specific volume as a function of pressure and temperature. Specific volume increases with the temperature increasing. There is a thermal transition in the polymer. The...

What about me…? The PVT: a role for the paraventricular thalamus (PVT) in drug-seeking behavior

The lack of effective pharmacotherapies to prevent relapse to drug taking emphasizes the importance of fully characterizing the brain pathways responsible for this behavior (Kalivas and McFarland, 2003). Recently, there have been attempts to more fully understand the brain circuitry responsible for drug-seeking behavior, beyond the well-characterized nodes such as the prefrontal cortex (PFC), n...

Asymptotic behavior of Brownian polymers

We consider a system that models the shape of a growing polymer. Our basic problem concerns the asymptotic behavior of Xt, the location of the end of the polymer at time t. We obtain bounds on Xt in the (physically uninteresting) case that d = 1 and the interaction function f (x ) > O. If, in addition, f (x ) behaves for large x like Cx -p with fi < 1 we obtain a strong law that gives the exact...

Conformational behavior of polymers adsorbed on nanotubes.

The importance of hydrophobic interactions in determining polymer adsorption and wrapping of carbon nanotubes is still under debate. In this work, we concentrate on the effect of short-ranged weakly attractive hydrophobic interactions between polymers and nanotubes (modeled as an infinitely long and smooth cylindrical surface), neglecting all other interactions apart for chain flexibility. Usin...

Mechanical Behavior of Filled Thermoplastic Polymers