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Influence of atmospheric pollutants on the natural and artificial aging of rigid poly(vinyl chloride)
Author(s) -
BelhanecheBensemra Naïma
Publication year - 2002
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10344
Subject(s) - vinyl chloride , degradation (telecommunications) , materials science , pollutant , polyvinyl chloride , polymer , drop (telecommunication) , chloride , composite material , chemistry , polymer chemistry , chemical engineering , organic chemistry , metallurgy , copolymer , telecommunications , computer science , engineering
The natural aging of rigid poly(vinyl chloride) (PVC) used in building and construction areas has been studied. Bars of PVC exposed in Algiers, where the concentrations of atmospheric pollutants (NO x , O 3 , hydrocarbons) are known, show a small drop in strain at break and stress at break, whereas hardness remains practically constant. Analysis by IR and UV‐visible spectroscopy shows the appearance of chemical structures due to polymer degradation (carbonyl groups, hydroperoxide groups, and polyenes) after the first months of exposure at three sites. It seems that O 3 exerted the most deleterious effect, followed by hydrocarbons and then by NO x . An artificial aging test was carried out to investigate the effect of O 3 on the degradation of PVC, and the results were compared to those from outdoor aging.