Role of free volume characteristics of polymer matrix in bulk physical properties of polymer nanocomposites: A review of positron annihilation lifetime studies

SK Sharma, PK Pujari - Progress in Polymer Science, 2017 - Elsevier
Polymer nanocomposites which have one or more nano-dimensional phases dispersed in
polymer matrix show enhancement in bulk physical properties. In order to achieve the …

[HTML][HTML] 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 …

Structural, dielectric and EMI shielding properties of polyvinyl alcohol/chitosan blend nanocomposites integrated with graphite oxide and nickel oxide nanofillers

P Rani, MB Ahamed, K Deshmukh - Journal of Materials Science: Materials …, 2021 - Springer
Polyvinyl alcohol (PVA) and Chitosan (CS)-based novel composites were prepared using
solution casting technique by introducing graphite oxide (GO) and nickel oxide (NiO) as …

Hybrid core-shell nanostructure made of chitosan incorporated polypyrrole nanotubes decorated with NiO for all-solid-state symmetric supercapacitor application

H Vijeth, SP Ashokkumar, L Yesappa, M Vandana… - Electrochimica …, 2020 - Elsevier
Nickel oxide (NiO) is a promising electrode material in supercapacitor (SC) applications, but
the poor electronic conductivity and weak electrochemical stability of NiO limits the fast …

Effects of the molecular level dispersion of graphene oxide on the free volume characteristics of poly (vinyl alcohol) and its impact on the thermal and mechanical …

SK Sharma, J Prakash, PK Pujari - Physical Chemistry Chemical …, 2015 - pubs.rsc.org
Poly (vinyl alcohol), PVA, reinforced with carbon nanofillers has shown drastic variations in
thermal as well as mechanical properties. In order to establish structure–property …

A study of the structural changes in a chitosan matrix produced by the adsorption of copper and chromium ions

PS Anbinder, C Macchi, J Amalvy, A Somoza - Carbohydrate polymers, 2019 - Elsevier
A study of the structural changes at micro-and nano-scale in a chitosan matrix after the
adsorption of different metal ions is presented. Toward this aim, samples of chitosan films …

Structure at interphase of poly (vinyl alcohol)–SiC nanofiber composite and its impact on mechanical properties: positron annihilation and small-angle X-ray scattering …

SK Sharma, J Prakash, K Sudarshan, D Sen… - …, 2015 - ACS Publications
The interphase structure of poly (vinyl alcohol)(PVA)–SiC nanofiber polymer
nanocomposites has been investigated using positron annihilation lifetime spectroscopy …

Probing sub-nano level molecular packing and correlated positron annihilation characteristics of ionic cross-linked chitosan membranes using positron annihilation …

R Xia, X Cao, M Gao, P Zhang, M Zeng… - Physical Chemistry …, 2017 - pubs.rsc.org
Chitosan, CS, cross-linked with bivalent palladium has shown enhanced mechanical and
thermal properties depending on the transformation of the structure at a microscopic scale …

Chitosan-graft-poly (n-butyl acrylate) copolymer: Synthesis and characterization of a natural/synthetic hybrid material

P Anbinder, C Macchi, J Amalvy, A Somoza - Carbohydrate Polymers, 2016 - Elsevier
Two chitosan polymers with different deacetylation degree and molecular weight were
subjected to grafting reactions with the aim to enhance the properties of these bio-based …

Investigation of free volume characteristics of the interfacial layer in poly (methyl methacrylate)–alumina nanocomposite and its role in thermal behaviour

SK Sharma, K Sudarshan, M Sahu, PK Pujari - RSC advances, 2016 - pubs.rsc.org
The free volume characteristics (free volume size, density and size distribution) of the
interfacial layer (IL) in PMMA–alumina (0.3 wt%) nanocomposites were investigated using …