Studies on modified benzotriazoles as photostabilizers for poly(vinyl chloride)

Add time:07/24/2019    Source:sciencedirect.com

It has been found that modified benzotriazoles: (2-(2-hydroxy-3-chlormethylacetamid-5-methylphenyl)2H-benzotriazole, 2-(2-hydroxy-3[(N,N-di-n-butyl)acetamidmethyl]-5-methyl-phenyl)2H-benzotriazole and 2-(2-hydroxy-3[(N,N-di-n-octyl)acetamidmethyl]-5-methyl-phenyl)2H-benzotriazole) have photostabilizing properties similar to those of Tinuvin P (2-(2-hydroxy-5-methylphenyl)2H-benzotriazole) for the photo-oxidative degradation of PVC under 3665 and 2537 A. The migration rate of stabilizers in a polymer matrix is decreased by introducing long chain groups. The possible mechanism of photosensitization is discussed.

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