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 …

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 …

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 …

Correlation between the free volume and thermal conductivity of porous poly (vinyl alcohol)/reduced graphene oxide composites studied by positron spectroscopy

G Xue, J Zhong, S Gao, B Wang - Carbon, 2016 - Elsevier
Light-weight porous poly (vinyl alcohol)(PVA)/reduced graphene oxide (rGO) composites
were prepared by freeze-drying method. The effects of doping rGO nanosheets on the free …

Graphene networks and their influence on free-volume properties of graphene–epoxidized natural rubber composites with a segregated structure: rheological and …

C He, X She, Z Peng, J Zhong, S Liao… - Physical Chemistry …, 2015 - pubs.rsc.org
Epoxidized natural rubber–graphene (ENR–GE) composites with segregated GE networks
were successfully fabricated using the latex mixing combined in situ reduced technology …

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 …

Correlation between microstructure and properties of graphene oxide/waterborne polyurethane composites investigated by positron annihilation spectroscopy

X Han, J Gao, Z Chen, X Tang, Y Zhao, T Chen - RSC advances, 2020 - pubs.rsc.org
A quantitative description of microstructure is highly desirable for the precise construction of
high performance graphene based polymer composites. In this paper, the effects of doping …

Effect of MWCNT carboxylation on mechanical, thermal and morphological behaviour of phenol formaldehyde nanocomposites

L Ravindran, MS Sreekala… - Journal of …, 2021 - journals.sagepub.com
Phenol-formaldehyde resin is an inevitable polymer material because of their excellent
properties like heat resistance, chemical resistance, creep resistance, and low water …

Application progress of PALS in the correlation of structure and properties for graphene/polymer nanocomposites

X Han, J Gao, T Chen, L Qian, H Xiong, Z Chen - Nanomaterials, 2022 - mdpi.com
Giving a deep insight into the microstructure, and realizing the correlation between
microstructure and properties is very important to the precise construction of high …