Models of the mechanical response of glassy polymers commonly assume that entanglements inherited from the melt act like chemical cross-links. The predictions from these network models and the physical picture they are based on are tested by following the evolution of topological constraints in simulations of model polymer glasses. The same behavior is observed for polymers with entanglement le...

We examine the vitrification and melting of asymmetric star polymer mixtures by combining rheological measurements with mode coupling theory. We identify two types of glassy states, a single glass, in which the small component is fluid in the glassy matrix of the big one, and a double glass, in which both components are vitrified. Addition of small-star polymers leads to melting of both glasses...

Sorption of vapors by glassy polymers is known to have properties that are different from those typical for sorption rubbery or liquids. Despite an importance many practical applications, this difference still not fully understood. We developed a thermodynamic theory description penetrant activity in the state. The presented approach considers glass transition terms second order phase and utili...