Application of the three‐component LT9.0 analyses and discrete four‐component PATFIT analysis to PAL distribution in some porous polymers, such as PIM‐1, AF2400, AF1600, PTMSP, give practically the same good fitting. In the conditions of this uncertainty, some additional experiments (thermomechanical tests, NMR on the protons of the absorbed water, thermo‐stimulated luminescence TSL, low temperature gas sorption BET, mathematic molecular‐dynamic simulation) give some arguments in favour of non‐Gaussian distribution of elementary free volumes EFV in some porous polymers and their possible heterogeneity. Furthermore, a comparison of PAL and TSL data confirm the idea on the interconnection between the rigidity of the polymer chains and effective size of the EFV. This interconnection is illustrated by the correlation of the o ‐Ps lifetime and intensity of the high‐temperature peak in the TSL glow curve. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

No abstract

Various commercial and industrial properties of polymeric materials can be developed by the way of purposeful synthesis. For example, there are polymeric materials of extremely developed intrinsic microporosity. In attempts to further develop membrane properties (permeability and selectivity), the researchers articially increase the pore sizes by various external inuences, such as plastication by saturation of polymers with gases, sometimes in supercritical state, lling of a polymer with some non-organic components (zeolites). Sometimes, porosity of the composition appears to become higher than that of the components. This porosity, in dierence with intrinsic one, can be called externally aected. The reason of these phenomena is not always clear, and in order to get some ideas in this eld we suggest an experimental study using a combination of the two genetically interconnected (by spur processes) methods: positron annihilation lifetime spectroscopy and thermostimulated luminescence. This paper summarizes recently published and completely new results of the authors in order to illustrate the benets of this experimental approach.

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Polymeric membrane materials with highly developed intrinsic microporosity for gas separation are studied. The porosity can be essentially improved by filling the polymer with nonorganic components (zeolites). This porosity, herein referred to as artificially induced, turned out, in some cases, to be higher than that of the con stituent components. The reasons for this effect are not always clear. To gain additional insights into the nature of this effect, an experimental study is suggested with the use of a combination of two methods related by being based on track processes: positron annihilation lifetime spectroscopy PALS and thermostimulated luminescence (TSL). The present paper summarizes and discusses both recently published results and completely new data.