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|Title:||Characterization of new hindered amine light stabilizers|
|Authors:||Lau, Wayne W.Y. |
|Source:||Lau, Wayne W.Y., Lee, C.S., Goh, S.H., Lee, A.Y., Pan, Jiangqing, Song, Yu (1993-10-05). Characterization of new hindered amine light stabilizers. Journal of Applied Polymer Science 50 (3) : 403-409. ScholarBank@NUS Repository. https://doi.org/10.1002/app.1993.070500304|
|Abstract:||New polymerizable urethane functional monomers containing hindered amine (III, III') and their copolymers with styrene (S) and methyl methacrylate (MMA) are characterized and tested as hindered amine light stabilizers (HALS). Experimental results indicated that the monomers possess high photostabilizing effectiveness comparable to that of Tinuvin 770 and Tinuvin 765. Their copolymers with S and MMA showed loser photostabilizing effectiveness mainly due to the low hindered amine content in the copolymers. The copolymers, however, showed vary high resistance to liquid extraction. UV and ESR analyses indicate that the photostabilizing mechanism of these HALS is through the scavenging action of nitroxyl radicals on alkyl radicals formed from degradation of the substrate polymer.|
|Source Title:||Journal of Applied Polymer Science|
|Appears in Collections:||Staff Publications|
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