Accelerated degradation of poly(vinyl chloride) (PVC) monitored by photoacoustic spectroscopy

Abu‐Zeid, M. E.; Nofal, E. E.; Marafi, M.; Tahseen, L. A.; Rasoul, Firas; Ledwith, A.

doi:10.1002/app.1984.070290801

Cited by 13 publications

(1 citation statement)

References 16 publications

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“…There are a number of literature references dealing with the dchydrochlorination of PVC, which develops rather rapidly upon exposure to sunlight [2,3]. As is well known, C-C1 bonds, which are highly resistant to chemical attack, can be cleaved fairly readily by the application of energy in a suitable form (heat, visible or UV light, and ionizing radiation).…”

Section: Introductionmentioning

confidence: 99%

Study of the interfacial chemistry of poly(vinyl chloride) paint on steel exposed to the ultraviolet- water condensation test

Feliú

Fierro

Maffiotte

et al. 1997

Journal of Adhesion Science and Technology

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Section: Introductionmentioning

confidence: 99%

Study of the interfacial chemistry of poly(vinyl chloride) paint on steel exposed to the ultraviolet- water condensation test

Feliú

Fierro

Maffiotte

et al. 1997

Journal of Adhesion Science and Technology

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Gelbfäurbung von weißpigmentiertem PVC bei Dunkellagerung nach Bewitterung

Hepp

1989

Angew. Makromol. Chem.

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ZUSAMMENFASSUNG:Bei der kunstlichen und natiirlichen Bewitterung von weiBen Fensterprofilmustern beobachtet man haufig eine Vergilbung, die mefltechnisch verfolgt werden kann durch Erfassung des b-Wertes. Diese Vergilbung entsteht wahrend der Dunkellagerungsphase und wird mit der Lange der Dunkellagerung verstarkt, bis sie eine gewisse Sattigung erreicht. Bei erneuter Exposition im Freien oder im Bewitterungsgerat ist diese Vergilbung reversibel. Es liegt die Vermutung nahe, dal3 es sich um ein Gleichgewicht zwischen Vergilbung im Dunkeln und Ausbleichen im Hellen handelt. Hierzu wurde ein Mechanismus vorgeschlagen, der den Zerfall von unter Sonneneinstrahlung gebildeten zyklischen Peroxiden im Dunkeln beinhaltet.Als Konsequenz dieser Arbeit sollte bei der Beurteilung von weil3em PVC-Material fur den AuBeneinsatz immer sofort nach Ende einer Expositionszeit die Farbveranderung gemessen werden, um Fehlmessungen, die durch langeres Lagern entstehen konnen, zu vermeiden und wirtschaftlichen Schaden von dem Produzenten abzuwenden. SUMMARY:When white window profile samples are artificially and naturally weathered, a yellowing is often observed that can be followed by measuring the b-value. This yellowing occurs during the dark storage phase and becomes increasingly pronounced the longer the duration of dark storage until it reaches a certain saturation point. With renewed exposure in the outdoor or in the weathering instrument this yellowing is reversible. This suggests that there is an equilibrium between yellowing in the dark and bleaching in the light. A mechanism was proposed for this that entails decomposition in the dark of cyclic peroxides formed by exposure to sunlight.As a result of this work, when assessing white PVC materials for outdoor use the color change should always be measured immediately at the end of the period of exposure. This will avoid measuring errors that can result from longer storage times and avert commercial losses from the manufacturer.

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Evidence of pyrene formation in butadiene–styrene‐based rubber subjected to UV irradiation

Abu‐Zeid

Amer

Ollis

1987

J of Applied Polymer Sci

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SynopsisA strong pyrene emission was observed when certain block, alternate, and random butadiene-styrene-based rubber films were subjected to intense W irradiation in vacuum. Weak or no pyrene emission was obtained from the same films when they are irradiated in the presence of 0,. A mechanistic scheme leading to pyrene formation in these samples is given together with qualitative explanation of the dependence of pyrene formation on sample composition.

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Accelerated degradation of poly(vinyl chloride) (PVC) monitored by photoacoustic spectroscopy

Cited by 13 publications

References 16 publications

Study of the interfacial chemistry of poly(vinyl chloride) paint on steel exposed to the ultraviolet- water condensation test

Study of the interfacial chemistry of poly(vinyl chloride) paint on steel exposed to the ultraviolet- water condensation test

Gelbfäurbung von weißpigmentiertem PVC bei Dunkellagerung nach Bewitterung

Evidence of pyrene formation in butadiene–styrene‐based rubber subjected to UV irradiation

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