Photochemical stability of UV-screening transparent acrylic copolymers of 2-(2-hydroxy-5-vinylphenyl)-2H-benzotriazoleThe mechanism of photodegradation of certain hydroxyphenyl benzotriazole based ultraviolet absorbers has been investigated and a new polymerizable ultraviolet absorber in this group has been synthesized. The photoreactivity is entirely confined at the surface of polymethylmethacrylate films containing the ultraviolet absorbers as pendant groups. A mechanism involving sensitized photooxidation has been proposed to interpret the data.
Document ID
19830066606
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gupta, A. (California Institute of Technology, Jet Propulsion Laboratory, Materials Research and Biotechnical Section, Pasadena CA, United States)
Scott, G. W. (California, University Riverside, CA, United States)
Kliger, D. (California, University Santa Cruz, CA, United States)
Vogl, O. (Massachusetts, University Amherst, MA, United States)