Probing the free volume in polymers by means of positron annihilation lifetime spectroscopy

G Consolati, D Nichetti, F Quasso - Polymers, 2023 - mdpi.com
Positron annihilation lifetime spectroscopy (PALS) is a valuable technique to investigate
defects in solids, such as vacancy clusters and grain boundaries in metals and alloys, as …

Recent advances in nanotechnology-based modifications of micro/nano PET plastics for green energy applications

JR Anusha, T Citarasu, G Uma, S Vimal, C Kamaraj… - Chemosphere, 2024 - Elsevier
Abstract Poly (ethylene terephthalate)(PET) plastic is an omnipresent synthetic polymer in
our lives, which causes negative impacts on the ecosystem. It is crucial to take mandatory …

Barrier properties of semicrystalline polylactide: The role of the density of the amorphous regions

M Safandowska, C Makarewicz, A Rozanski… - …, 2022 - ACS Publications
The work explains the mechanism of the improvement of oxygen barrier performance of cold-
crystalized polylactide (PLA) modified with low molecular weight compounds (triethyl citrate …

Inner-selective polyethersulfone-polydimethylsiloxane (PES-PDMS) thin film composite hollow fiber membrane for CO2/N2 separation at high pressures

B Zhao, JW Wong, CZ Liang, J Wu, TS Chung… - Separation and …, 2023 - Elsevier
Carbon dioxide (CO 2) is the dominant greenhouse gas (GHG) and thus CO 2 capture from
flue gas of power plants, the main anthropogenic source of emission, is a key approach to …

Minute-Scale Evolution of Free-Volume Holes in Polyethylenes during the Continuous Stretching Process Observed by In Situ Positron Annihilation Lifetime …

D Huang, Y Dong, H Guo, E Yang, Y Chen… - …, 2023 - ACS Publications
Using the newly developed positron annihilation lifetime spectroscopy (PALS) facility with a
high count rate up to 3000 cps, in situ PALS experiments were performed for the first time on …

Retrospecting the relationship between interlamellar amorphous structure and intrinsic modulus of semicrystalline polymers via in-situ positron annihilation lifetime …

H Guo, Z Hong, D Huang, E Yang, Z Zhu, C Zhao… - Polymer, 2023 - Elsevier
The structure-property relationship of the interlamellar amorphous phase in semicrystalline
polymers has been a fundamental yet controversial topic in polymer physics for several …

Polyethylene Nanocomposites with Carbon Nanofillers: Similarities and Differences and New Insight on Cavitation in Tensile Drawing

V Rahmanian, A Galeski, A Rozanski - Macromolecules, 2024 - ACS Publications
Polyethylene nanocomposites with most of the known carbon nanoparticles (carbon black,
nanodiamonds, carbon nanotubes, fullerene, graphene, and reduced graphene oxide) were …

Plastic deformation of polypropylene studied by positron annihilation lifetime spectroscopy

C Makarewicz, M Safandowska, R Idczak… - …, 2022 - ACS Publications
In this work, positron annihilation lifetime spectroscopy (PALS) was used for the first time to
study the plastic deformation of polypropylene. An appropriate methodological approach …

Deformation instabilities and cavitation in plastic deformation of semicrystalline polyethylene

Z Bartczak, A Vozniak - Macromolecules, 2024 - ACS Publications
Tensile deformation behavior of semicrystalline high-density polyethylene (HDPE) was
investigated and compared with compression to identify the main mechanisms and …

Diminishment the gas permeability of polyethylene by “densification” of the amorphous regions

M Safandowska, C Makarewicz, A Rozanski… - Scientific Reports, 2023 - nature.com
High-density polyethylene/paraffin wax (HDPE/wax) systems with adjustable density of the
amorphous regions were prepared by a melt-blending process to optimize/control the final …