Molar-Volume Additivity on Polymers

Excluded volume effects on semiflexible ring polymers.

Two-dimensional semiflexible polymer rings are studied both by imaging circular DNA adsorbed on a mica surface and by Monte Carlo simulations of phantom polymers as well as of polymers with finite thickness. Comparison of size and shape of the different models over the full range of flexibilities shows that excluded volume caused by finite thickness induces an anisotropic increase of the main a...

An Accurate Correlation to Estimate Saturated Molar Volume of Liquids

There are a number of techniques available to estimate saturated-liquid molar or specific volumes or densities of liquids. In this study, a new empirical correlation is presented to calculate volume of saturated liquids as a function of critical volume, reduced temperature and acentric factor. An optimization algorithm is utilized to obtain unknown parameters of this correlation by fitting them...

Effect of volume changes on segmental relaxation in siloxane polymers.

From dielectric relaxation and equation-of-state measurements on polymethylphenylsiloxane and polymethyltolylsiloxane, the relative contributions of volume and thermal energy to the temperature dependence of the segmental relaxation times are quantified. In both polymers, volume exerts a substantial effect, being almost as significant as thermal energy. A possible consequence of this prominent ...

Remarks on Cyclic Additivity

Comments on Hastings’ Additivity Counterexamples

3 Background on random states and channels 7 3.1 Probability distributions for states . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 Probability distributions on the simplex ∆d . . . . . . . . . . . . . . . . . . . . . . 8 3.3 Estimates for μd,n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.4 Probability distribution for random unitary channels . ....