Photooxidative Behavior of Polystyrene Nanocomposites Filled with Two-Dimensional Molybdenum Disulfide

Photooxidative Behavior of Polystyrene Nanocomposites Filled with Two-Dimensional Molybdenum Disulfide

This study aimed to investigate how an ultralow content of a molybdenum disulfide (MoS ) two-dimensional particle affects the photodegradation mechanism of polystyrene (PS). Here, an accelerated weathering study was presented on neat polystyrene and its nanocomposites produced with 0.001, 0.002, 0.0...

Full description

Saved in:
Bibliographic Details
Published in:Polymers Vol. 15; no. 9; p. 2099
Main Authors: Angulo, Aurianny Lima, Rodriguez, Camila Laura Celis, Fechine, Guilhermino José Macedo
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 28-04-2023
MDPI
Subjects:
Fourier transforms
Free radicals
Infrared spectroscopy
Molybdenum
Molybdenum compounds
Molybdenum disulfide
Nanocomposites
Oxidation
Photodegradation
Polymers
Polystyrene resins
Size exclusion chromatography
Spectrum analysis
Ultraviolet radiation
UV stabilizers
two-dimensional filler
molybdenum disulfide
photodegradation
nanocomposites
polystyrene
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study aimed to investigate how an ultralow content of a molybdenum disulfide (MoS ) two-dimensional particle affects the photodegradation mechanism of polystyrene (PS). Here, an accelerated weathering study was presented on neat polystyrene and its nanocomposites produced with 0.001, 0.002, 0.003 and 0.005 wt% of molybdenum disulfide (MoS ) exposed for various irradiation intervals (up to 8 weeks). The polymer photo-transformations were monitored using size exclusion chromatography (SEC), infrared spectroscopy (FTIR), and UV-Vis spectroscopy. The FTIR and UV/Vis results indicate that the PS degradation mechanism was not altered by the presence of MoS particles; however, the degradation reactions were slowed down at higher MoS contents (>0.003%). The SEC results proved the stabilizer effect due to MoS particles, where M¯n, M¯w, and M¯w/M¯n values after 8 weeks were less modified when compared with the neat PS results. The MoS acted as a UV stabilizer, and these two-dimensional particles acted by deactivating the free radicals generated by the PS matrix, even considering the low amount of the filler (<0.005 wt%).
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:2073-4360
2073-4360
DOI:10.3390/polym15092099