01691nas a2200265   4500008004100000022001400041245012400055210006900179260008600248300001400334490000800348520073300356653000901089653002701098653002301125653001901148100002201167700001301189700001801202700002101220700002401241700001501265700001601280856012901296       2005                        eng d  a1060-132500aSynthesis, characterization, and performance evaluation of polymeric HALS in ethylene-propylene-diene terpolymer (EPDM)0 aSynthesis characterization and performance evaluation of polymer  a325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcAUG  a1037-10460 vA423 a<p>A polymeric hindered amine light stabilizer (HALS), wherein the hindered amine functionality was attached to the maleic anhydride graft ethylene-propylene-diene terpolymer (EPDM) was synthesized. This involves photoinduced grafting of maleic anhydride groups on unsaturated sites of EPDM, followed by incorporation of amino terminated HALS. The grafting and functionalization reactions were characterized by FTIR and C-13 NMR spectroscopy. The surface changes upon degradation are studied by SEM. The photostabilizing efficiency of this polymeric HALS was studied and compared with conventional HALS under accelerated weathering conditions. The HALS grafted EPDM showed significantly improved photostabilizing efficiency.</p>10aEPDM10alight induced grafting10aPhotostabilization10apolymeric HALS1 aLonkar, Sunil, P.1 aRana, S.1 aSingh, R., P.1 aLacoste, Jacques1 aGardette, Jean, Luc1 aJestin, F.1 aBrocord, E.  uhttps://library.ncl.res.in/content/synthesis-characterization-and-performance-evaluation-polymeric-hals-ethylene-propylene-001801nas a2200253   4500008004100000022001400041245011900055210006900174260006800243300001400311490000800325520084700333653002601180653003401206653001901240653001801259653003801277100002201315700002001337700002001357700002101377700001801398856013101416       2007                        eng d  a0021-899500aSynthesis and characterization of hindered amine light stabilizers based on end functionalization of polypropylene0 aSynthesis and characterization of hindered amine light stabilize  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAY  a1596-16020 v1043 a<p>A polymeric hindered amine light stabilizer (HALS), where HALS moiety was attached at the terminal end of the polypropylene chain via end-functionalized vinylidine PP through simple organic reactions, was synthesized. It comprises the synthesis of vinylidine-terminated polypropylene by using Cp2ZrCl2/MAO as catalyst system and epoxidation of vinylidene polypropylene. The final product was synthesized by carrying out the reaction between epoxy end functionalized polypropylene and 4-amino-2,2,6,6-tetrametyl piperidine. The final product was characterized by using H-1 NMR, C-13 NMR, and FT-IR spectra. Functionality was calculated by using vapor phase osmometry and H-1 NMR. The solubility and diffusion coefficient of the product were calculated and also its stabilization performance was checked. (c) 2007 Wiley Periodicals, Inc.</p>10aend functionalization10afunctionalization of polymers10apolymeric HALS10apolypropylene10avinylidine and photostabilization1 aReddy, Raghunatha1 aKumar, Bijendra1 aRana, Sravendra1 aTevtia, Amit, K.1 aSingh, R., P.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-hindered-amine-light-stabilizers-based-end-functionalization