NAVRACHANA UNIVERSITY

Synthesis of new polymeric hindered amine light stabilizers: performance evaluation in styrenic polymers

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dc.contributor.author Singh, R. P.
dc.contributor.author Patwa, A. N.
dc.contributor.author Desai, S. M.
dc.contributor.author Pandey, J. K.
dc.contributor.author Solanky, S. S.
dc.contributor.author Vishwa Prasad, A.
dc.date.accessioned 2019-06-14T07:29:51Z
dc.date.available 2019-06-14T07:29:51Z
dc.date.issued 2003
dc.identifier.issn 0021-8995 (P-ISSN)
dc.identifier.issn 1097-4628 (E-ISSN)
dc.identifier.uri http://27.109.7.66:8080/xmlui/handle/123456789/589
dc.description Journal of Applied Polymer Science, Vol-90, Issue-4, 2003, p. 1126-1138 en_US
dc.description.abstract Polymeric hindered amine light stabilizers (HALSs), in which the HALS functionality was attached to the terminal isocyanate chain end of poly(styryl-co-styryl isocyanate), were synthesized by a two-step process. First, cinnamoyl azide was prepared and copolymerized with styrene by a free-radical copolymerization method. Polymeric low-molecular-weight and high-molecular-weight 2,2,6,6- tetramethyl-4-pipridinol-graft-poly(styryl-co-styryl isocyanate) and 4-amino-2,2,6,6-tetramethyl piperidine-graft-poly- (styryl-co-styryl isocyanate) were synthesized by a grafting method. The photodegradation and stabilization of different grades of high-impact polystyrene (HIPS) were studied at 55°C in air at different time intervals, and the photostabilizing efficiency of polymeric HALSs was compared with conventional light stabilizers, such as 2,2,6,6-tetramethyl-4- pipridinol and bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate. Polymeric HALSs showed significant improvements in the photostabilization of HIPS. The solubility and diffusion coefficient of polymeric HALSs were studied. The morphological changes in HIPS caused by photooxidation were also studied. en_US
dc.language.iso en_US en_US
dc.publisher Wiley Periodicals en_US
dc.subject Additives en_US
dc.subject Degradation en_US
dc.subject Polystyrene en_US
dc.subject Radiation en_US
dc.title Synthesis of new polymeric hindered amine light stabilizers: performance evaluation in styrenic polymers en_US
dc.type Article en_US


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