Calculation of the efficiency of ultraviolet screeners in plastics | Zendy

Pickett James E. | Zendy

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Calculation of the efficiency of ultraviolet screeners in plastics

Author(s) -

Pickett James E.

Publication year - 1987

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1987.070330220

Subject(s) - photodegradation , polymer , degradation (telecommunications) , molar absorptivity , materials science , absorption (acoustics) , ultraviolet , photochemistry , layer (electronics) , composite material , optics , chemical engineering , chemistry , optoelectronics , organic chemistry , catalysis , photocatalysis , telecommunications , physics , computer science , engineering

Calculation of the effect of light absorbers (UV screeners) on the photochemistry of polymers shows that a critical factor in reducing the rate of photodegradation is the thickness of the actual degraded layer. When the degradation is confined to a zone within a few microns of the exposed surface, the efficiency of light absorption as a stabilization mechanism is greatly reduced. The relative absorptivity of the base resin and pigment loadings are calculated to have a minor effect on stabilization efficiency for polymers having thin layers of degradation.

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