Add to ORKGThe free-volume parameters in various urethane/urea membranes obtained by varying the ratio of the structural constituents, polypropylene oxide and polybutadiene, were studied by positron lifetime and Doppler broadening measurements. On bi-soft segment membranes, a correlation was found between the composition of membranes, the normalized free volume, the radii of the holes and gas permeability. However, the correlation is not clear when PU data are also considered, indicating that other features must also play an important role in the permeation mechanism.http://www.sciencedirect.com/science/article/B6TVT-48H860J-4/1/74946bc8221d14cebbfe3ab0fa201ab
The free volume of a polymer, which corresponds to the unoccupied regions accessible to segmental mo...
There are numerous reasons why the exploration of dynamic free volume is particularly important for ...
Intermolecular spaces in polymer chains form the free volume, a useful concept to understand mechani...
Free-volume parameters in polyurethane/urea membranes have been studied by positron annihilation lif...
The free-volume parameters in various urethane/urea membranes obtained by varying the ratio of the s...
The effects of the soft segment and temperature on the free volume and gas permeability have been st...
Positron annihilation lifetime spectroscopy was used to study the free volume parameters in polyprop...
Varying systematically the structure of glassy poly(amide imide), poly(ester imide), and polyimide, ...
Positron annihilation lifetime spectroscopy (PALS) measurements are reported on a three polyurethane...
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique for assessing the typical...
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique for assessing the typical...
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique for assessing the typical...
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique for assessing the typical...
Separation of liquid mixtures, particularly azeotropic mixtures, is being tried out by pervaporation...
During the last decades positron annihilation has become a very powerful tool for the investigation ...
The free volume of a polymer, which corresponds to the unoccupied regions accessible to segmental mo...
There are numerous reasons why the exploration of dynamic free volume is particularly important for ...
Intermolecular spaces in polymer chains form the free volume, a useful concept to understand mechani...
Free-volume parameters in polyurethane/urea membranes have been studied by positron annihilation lif...
The free-volume parameters in various urethane/urea membranes obtained by varying the ratio of the s...
The effects of the soft segment and temperature on the free volume and gas permeability have been st...
Positron annihilation lifetime spectroscopy was used to study the free volume parameters in polyprop...
Varying systematically the structure of glassy poly(amide imide), poly(ester imide), and polyimide, ...
Positron annihilation lifetime spectroscopy (PALS) measurements are reported on a three polyurethane...
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique for assessing the typical...
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique for assessing the typical...
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique for assessing the typical...
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique for assessing the typical...
Separation of liquid mixtures, particularly azeotropic mixtures, is being tried out by pervaporation...
During the last decades positron annihilation has become a very powerful tool for the investigation ...
The free volume of a polymer, which corresponds to the unoccupied regions accessible to segmental mo...
There are numerous reasons why the exploration of dynamic free volume is particularly important for ...
Intermolecular spaces in polymer chains form the free volume, a useful concept to understand mechani...