SYNTHESIS, CHARACTERIZATION AND PERFORMANCE EVALUATION OF HINDERED AMINE LIGHT STABILIZER END-FUNCTIONALIZED POLY(ETHYLENE-ALT-PROPENE) COPOLYMER

Authors
MANI R SINGH RP CHAKRAPANI S SIVARAM S
Citation
R. Mani et al., SYNTHESIS, CHARACTERIZATION AND PERFORMANCE EVALUATION OF HINDERED AMINE LIGHT STABILIZER END-FUNCTIONALIZED POLY(ETHYLENE-ALT-PROPENE) COPOLYMER, Polymer, 38(7), 1997, pp. 1739-1744
Citations number
25
Categorie Soggetti
Polymer Sciences
Journal title
Polymer → ACNP
ISSN journal
00323861
Volume
38
Issue
7
Year of publication
1997
Pages
1739 - 1744
Database
ISI
SICI code
0032-3861(1997)38:7<1739:SCAPEO>2.0.ZU;2-T
Abstract
A polymeric hindered amine light stabilizer (HALS), wherein the HALS f unctionality was attached to the terminal chain end of an alternating ethylene-propylene copolymer has been synthesized by terminating the l iving anionic polymerization of isoprene with 4(2,3-epoxy propoxy)-1,2 ,2,6,6-pentamethylpiperidine followed by hydrogenation of the resultin g polymer using Ziegler type catalyst. The solubility and diffusion co efficient of this polymeric HALS have been studied and compared with c onventional low and high molecular weight HALS (Tinuvin 770 and Chimas orb 944). The photo-stabilizing efficiency of this polymeric HALS was also studied and compared with conventional HALS at different concentr ations and it was observed that polymeric HALS showed a significantly improved photo-stabilizing efficiency. (C) 1997 Elsevier Science Ltd.