Detail publikačního výsledku

Polymer weathering in Antarctica

TOCHÁČEK, J., LÁSKA, K., BÁLKOVÁ, R., KRMÍČEK, L., MERNA, J., TUPÝ, M., KAPLER P., POLÁČEK, P., ČÍŽKOVÁ, K., BURÁŇ, Z.

Originální název

Polymer weathering in Antarctica

Anglický název

Polymer weathering in Antarctica

Druh

Článek WoS

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

Weathering; Photo-oxidation; Stabilization; Polypropylene; Antarctica; HALS

Klíčová slova v angličtině

Weathering; Photo-oxidation; Stabilization; Polypropylene; Antarctica; HALS

Autoři

TOCHÁČEK, J., LÁSKA, K., BÁLKOVÁ, R., KRMÍČEK, L., MERNA, J., TUPÝ, M., KAPLER P., POLÁČEK, P., ČÍŽKOVÁ, K., BURÁŇ, Z.

Rok RIV

2020

Vydáno

10.07.2019

Nakladatel

ELSEVIER SCI LTD

Místo

OXFORD

ISSN

0142-9418

Periodikum

POLYMER TESTING

Svazek

2019

Číslo

77

Stát

Spojené království Velké Británie a Severního Irska

Strany od

105898

Strany do

105898

Strany počet

15

URL

https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0142941819303721

Plný text v Digitální knihovně

http://hdl.handle.net/

BibTex

@article{BUT157646,
  author="Jiří {Tocháček} and Kamil {Láska} and Radka {Bálková} and Lukáš {Krmíček} and Jan {Merna} and Michael {Tupý} and Pavel {Kapler} and Petr {Poláček} and Klára {Čížková} and Zdeněk {Buráň}",
  title="Polymer weathering in Antarctica",
  journal="POLYMER TESTING",
  year="2019",
  volume="2019",
  number="77",
  pages="105898--105898",
  doi="10.1016/j.polymertesting.2019.105898",
  issn="0142-9418",
  url="https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0142941819303721"
}