Detail publikace

Polymer life-time prediction: The role of temperature in UV accelerated ageing of polypropylene and its copolymers

TOCHÁČEK, J. VRÁTNÍČKOVÁ, Z.

Originální název

Polymer life-time prediction: The role of temperature in UV accelerated ageing of polypropylene and its copolymers

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Correlation of accelerated ageing data with that of outdoor exposure was carried out based on the comparison of total UV radiation energy (TUVR) needed for degradation of the PP - homopolymer, random copolymer (TOT C2 3.2 wt.%) and impact copolymer (TOT C2 5.4 wt.%) compression moulded 0.5 mm films. Films were stabilized with 1000 ppm butylated hydroxytoluene (BHT), no UV stabilizer was used. Accelerated ageing was realized in a Q-Sun Xe-1 exposure chamber using a filtered xenon light source and a dry cycle. Weathering was carried out at Brno exposure site, representing the typical mid-European climate. Accelerated ageing was carried out at temperatures of 40, 50, 60 and 70 C. In accelerated ageing, both the onset of carbonyl index (CI) increase and the point of reaching the same relative increase in CI as due to weathering were used as measures of polymer degradation. For induction periods attained at different temperatures, TUVR energies were calculated accordingly and compared to that of 6 months outdoor exposure. It was found that if TUVR of both types of ageing is to be directly compared, accelerated ageing should be carried out at temperatures of 32–36 C. Under such conditions, the same amount of TUVR energy induces the same extent of polymer deterioration in both types of ageing and may, therefore, be used for a reliable service life-time prediction.

Klíčová slova

UV, Accelerated ageing, Weathering, Outdoor exposure, Radiant energy, Degradation, Carbonyl index, Polypropylene, Temperature, Copolymer, Life-time prediction

Autoři

TOCHÁČEK, J.; VRÁTNÍČKOVÁ, Z.

Rok RIV

2014

Vydáno

21. 4. 2014

Nakladatel

Elsevier

Místo

London, GB

ISSN

0142-9418

Periodikum

POLYMER TESTING

Ročník

2014

Číslo

36

Stát

Spojené království Velké Británie a Severního Irska

Strany od

82

Strany do

87

Strany počet

6

BibTex

@article{BUT107270,
  author="Jiří {Tocháček} and Zlata {Vrátníčková}",
  title="Polymer life-time prediction: The role of temperature in UV accelerated ageing of polypropylene and its copolymers",
  journal="POLYMER TESTING",
  year="2014",
  volume="2014",
  number="36",
  pages="82--87",
  doi="10.1016/j.polymertesting.2014.03.019",
  issn="0142-9418"
}