Sentences with phrase «glass transition»

At the so - called glass transition temperature, the relaxation time is on the order of a few minutes.

«Going glassy: Revealing structure and dynamics of glassy polymers during transition: Simulation of glass transition in a polymer film and offers fundamental insights about the influence of molecular structure on the transition temperature.»

Lyulin and his colleagues looked at the polymer glass transition in bulk samples, but were especially interested in thin films of polystyrene.

Loosely bound water (mostly from urine) is separated using low glass transition temperature hollow - fibre membranes.

«In our paper, we studied only polystyrene structure and what happens to this structure at glass transition when you go to very thin, nanometer - thick films,» Lyulin said.

In Physical Review X, researchers from The University of Tokyo's Institute of Industrial Science (IIS) give a detailed study of the structural changes during glass transition.

«Is glass transition driven by thermodynamics?.»

I think we are seeing that same glass transition,» says Sigfusson.

Additionally, we recently have reported ion - conducting copolymer systems in which judicious choice of taper geometry led to reductions in block glass transition temperatures, which ultimately reduced barriers to ion - transport and enhanced conductivity.

There is a principle in polymer chemistry called the «time - temperature superposition,» which says that fibres with low glass transition temperatures will also cope well with sudden dynamic loads — such as those that a parachute rope is subject to.»

These motions are constrained by localised forces in the molecular environment and, in contrast to the relatively large motions that happen above the glass transition temperature, the molecular motions above the lower temperature threshold are much subtler.

Using a technique called dynamic mechanical analysis as well as terahertz spectroscopy, Zeitler and his colleagues showed that instead of the glass transition temperature, the molecular motions occurring until a lower temperature threshold, are responsible for crystallisation.

In order to determine when and how solids will crystallise, most researchers had focused on the glass transition temperature, which is the temperature above which molecules can move in the solid more freely and can be measured easily.

Another quality of spider silk is its «glass transition temperature.»

By combining a number of tools and techniques, a team of researchers from the U.S., Italy and China was able to find a more complete picture of the glass transition phenomenon in polymers and to point out where the polymers differ from small molecular liquids.

In studying the glass transition for polymers at this scale, Lyulin pointed out that researchers want to learn about the relevant dynamics as well as the structure.

«And because of this weakening, the glass transition occurs lower in temperature.»

«Glass transition is actually a mysterious phenomenon,» Lyulin said.

The glass transition, or the temperature when cooled liquids transform into a glass, is another mystery.

Glasses have many important industrial applications, yet understanding the changes that occur over the wide range of time and length scales of the glass transition remains a challenge.

Famously described as «the deepest problem in solid state physics» by Nobel Laureate, Philip Andersen, the glass transition, by which a liquid transforms into a solid without freezing, is shedding its mystique.

«In other words, the dynamical and thermodynamic interpretations of the glass transition are different reflections of the same underlying phenomenon.»

Dr Royall said: «In doing so, they found that the dynamical interpretation of the glass transition seems to end at a «critical point», which is close to, or even coincides with, the temperature at which the ideal glass is formed.

Increased hydrodynamic radius (in solution) and glass transition temperature (in bulk materials) were observed upon metallation with Zn2 +.

The researchers believe their organic metal provides a convenient test platform for studying the fundamental properties of the liquid - to - glass transition.

The role of vibrational entropy in stabilizing or destabilizing the amorphous phase was determined by measuring the phonons through the glass transition.

His focus is to develop high - frequency calorimetry methods and to use them to measure heat capacities of metals and silicates at high pressures in order to study melting, pre-melting phenomena, and the glass transition.

The study results revealed that the green tea powder» health benefits degrade at low temperatures, even lower than the glass transition temperature.

The temperature that an amorphous solid is changed from a glassy, rigid state to a viscous, rubbery state is known as the glass transition temperature.

Although tea powders degrade slower below the glass transition temperature, they can still degrade.

It is amorphous with no specific melting point but the temperature when it changes to a liquid state (glass transition temperature) is 105oC.

The glass transition temperature of PLA is 60 — 65oC.

The new polymer must fuse with the previous layer and there are two keys to this — the temperature of polymer being extruded and keeping the model as close to the glass transition temperature as possible.

Stratasys were the first to market with an FDM machine and patented a heated chamber kept a few degrees below the glass transition temperature of the polymer.

It is amorphous with no specific melting point but the temperature when it changes to a liquid state (glass transition temperature) is 105 degree celsius.

The small lip at the display's edge where the glass transitions to glossy plastic breaks the illusion a bit, but it doesn't impact its smooth feel in the palm.