When some elementary free volumes in polymers are not seen by positron annihilation experiments

Shantarovich, V. P.; Bekeshev, V. G.; Пастухов, А. В.; Davankov, V. A.; Красильникова, О. К.; Belousova, E. V.; Kevdina, I. B.; Filimonov, M. K.; Gustov, V. V.

doi:10.1088/1742-6596/618/1/012021

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…4 . The last column shows specific surface of the studied compounds [7,8]. Interestingly, areas of PALS and LTGS application partly overlap (see area τ 4 → D 4 , V 4 in Fig.…”

Section: Bjh Avmentioning

confidence: 99%

Nanoporosity of Polymer Sorbents and Membrane Materials as Seen by PALS and Low Temperature Gas Sorption

Shantarovich

Bekeshev²,

Kevdina³

et al. 2017

Acta Phys. Pol. A

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The limits of application of positron annihilation lifetime spectroscopy and low temperature gas sorption for studying nanoporosity of polymer sorbents and membrane materials are discussed relying on the results previously obtained by the authors. For the two methods, limitations are determined by different factors: the dispersion of the material is essential for low temperature gas sorption, while concentration of nanopores of given size is important for positron annihilation lifetime spectroscopy. The both methods came out to be a useful addition to each other in the studies of micropores and mesopores.

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“…4 . The last column shows specific surface of the studied compounds [7,8]. Interestingly, areas of PALS and LTGS application partly overlap (see area τ 4 → D 4 , V 4 in Fig.…”

Section: Bjh Avmentioning

confidence: 99%

Nanoporosity of Polymer Sorbents and Membrane Materials as Seen by PALS and Low Temperature Gas Sorption

Shantarovich

Bekeshev²,

Kevdina³

et al. 2017

Acta Phys. Pol. A

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Microporosity of Polynorbornenes by Positron Annihilation and Sorption Data

et al. 2021

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Cavitation and Solid-State Post-Condensation of Polyethylene Terephthalate: Literature Review

Wawrzyniak,

Karaszewski,

Różański

2024

Materials

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Polyethylene terephthalate (PET) is widely used in bottle production by stretch blow molding processes (SBM processes) due to its cost-effectiveness and low environmental impact. The presented literature review focuses on microcavitation and solid-state post-condensation effects that occur during the deformation of PET in the SBM process. The literature review describes cavitation and microcavitation effects in PET material and solid-state post-condensation of PET on the basis of a three-phase model of the PET microstructure. A three-phase model of PET microstructure (representing the amorphous phase in two ways, depending on the ratio of the trans-to-gauche conformation of the PET macromolecule and the amount of free volume) with a nucleation process, a crystallization process, and the use of positron annihilation lifetime spectroscopy (PALS) to analyze PET microstructure are discussed in detail. The conceptual model developed based on the literature combines solid-state post-condensation with microcavitation via the diffusion of the post-condensation product. This review identifies the shortcomings of the developed conceptual model and presents them with five hypotheses, which will be the basis for further research.

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When some elementary free volumes in polymers are not seen by positron annihilation experiments

Cited by 3 publications

References 21 publications

Nanoporosity of Polymer Sorbents and Membrane Materials as Seen by PALS and Low Temperature Gas Sorption

Nanoporosity of Polymer Sorbents and Membrane Materials as Seen by PALS and Low Temperature Gas Sorption

Microporosity of Polynorbornenes by Positron Annihilation and Sorption Data

Cavitation and Solid-State Post-Condensation of Polyethylene Terephthalate: Literature Review

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