Další formáty:
BibTeX
LaTeX
RIS
@article{1587157,
author = {Tocháček, Jiří and Láska, Kamil and Bálková, Radka and Krmíček, Lukáš and Merna, Jan and Tupý, Michael and Kapler, Pavel and Poláček, Petr and Čížková, Klára and Buráň, Zdeněk},
article_location = {OXFORD},
article_number = {AUG 2019},
doi = {http://dx.doi.org/10.1016/j.polymertesting.2019.105898},
keywords = {Weathering; Photo-oxidation; Stabilization; Polypropylene; Antarctica; HALS},
language = {eng},
issn = {0142-9418},
journal = {Polymer Testing},
title = {Polymer weathering in Antarctica},
url = {https://www.sciencedirect.com/science/article/pii/S0142941819303721},
volume = {77},
year = {2019}
}
TY - JOUR
ID - 1587157
AU - Tocháček, Jiří - Láska, Kamil - Bálková, Radka - Krmíček, Lukáš - Merna, Jan - Tupý, Michael - Kapler, Pavel - Poláček, Petr - Čížková, Klára - Buráň, Zdeněk
PY - 2019
TI - Polymer weathering in Antarctica
JF - Polymer Testing
VL - 77
IS - AUG 2019
SP - 1-15
EP - 1-15
PB - ELSEVIER SCI LTD
SN - 01429418
KW - Weathering
KW - Photo-oxidation
KW - Stabilization
KW - Polypropylene
KW - Antarctica
KW - HALS
UR - https://www.sciencedirect.com/science/article/pii/S0142941819303721
L2 - https://www.sciencedirect.com/science/article/pii/S0142941819303721
N2 - Antarctica is definitely not a typical locality for polymer testing, and yet, polymers are used there. Antarctic climate is typical with a higher portion of solar ultraviolet (UV) part in the global radiation and extremely low temperatures. Overall effect of Antarctic climatic conditions on polymer environmental degradation was investigated. Weathering experiments were carried out on 0.5 mm isotactic polypropylene homopolymer (h-PP) extruded films - non-UV-stabilized and stabilized with 1000 ppm HALS-1 (low-molecular) and 1000 ppm HALS-2 (oligomeric), respectively. The materials were exposed on James Ross Island in Antarctica for 3 years. A parallel reference series representing weathering in Central Europe (CE) was exposed in Brno, Czech Republic. Climatic data such as incident UV-A, UV-B and global radiation, outdoor air temperatures and total ozone content (TOC) were recorded during the experiment at both exposure sites. Degradation changes in polymer matrix were determined using GPC, FTIR, DSC, TGA, LTHS, SEM techniques and tensile tests. The measurements provided valuable data on h-PP photo-oxidation in Antarctica, on its possible UV stabilization and showed that despite extremes in environmental conditions h-PP degradation rate in Antarctica was still slower compared to CE. Beside UV radiation, higher ambient temperatures accelerating the secondary propagation reactions of alkylperoxy radicals are mainly responsible for the faster photo-degradation in CE.
ER -
TOCHÁČEK, Jiří, Kamil LÁSKA, Radka BÁLKOVÁ, Lukáš KRMÍČEK, Jan MERNA, Michael TUPÝ, Pavel KAPLER, Petr POLÁČEK, Klára ČÍŽKOVÁ a Zdeněk BURÁŇ. Polymer weathering in Antarctica. \textit{Polymer Testing}. OXFORD: ELSEVIER SCI LTD, 2019, roč.~77, AUG 2019, s.~1-15. ISSN~0142-9418. Dostupné z: https://dx.doi.org/10.1016/j.polymertesting.2019.105898.
|
