@article { ISI:000231359100007, title = {Synthesis, characterization, and performance evaluation of polymeric HALS in ethylene-propylene-diene terpolymer (EPDM)}, journal = {Journal of Macromolecular Science, Part A: Pure and Applied Chemistry }, volume = {A42}, number = {8}, year = {2005}, month = {AUG}, pages = {1037-1046}, publisher = {TAYLOR \& FRANCIS INC}, type = {Article}, address = {325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA}, abstract = {

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.

}, keywords = {EPDM, light induced grafting, Photostabilization, polymeric HALS}, issn = {1060-1325}, doi = {10.1081/MA-200065905}, author = {Lonkar, Sunil P. and Rana, S. and Singh, R. P. and Lacoste, Jacques and Gardette, Jean Luc and Jestin, F. and Brocord, E.} } @article {36}, title = {Selective oxidation of anthracene using inorganic-organic hybrid materials based on molybdovanadophosphoric acids}, journal = {Journal of Catalysis}, volume = {247}, number = {2}, year = {2007}, month = {APR}, pages = {166-175}, publisher = {EUROPEAN POLYMER FEDERATION}, type = {Article}, address = {1, QUAI LEZAY-MARNESIA, F067000 STRASBOURG, FRANCE}, abstract = {

{Inorganic-organic hybrid materials were synthesized by immobilization of molybdovanadophosphoric acids onto mesoporous silicas, such as MCM-41, MCM-48, and SBA-15, through an organic linker. 12-Molybdovanadophosphoric acids of the general formula H3+xPMO12-xVxO40 (x = 0-3).nH(2)O, such as H-4[

}, keywords = {EPDM, Photostabilization, polymeric HALS}, issn = {1618-7229}, doi = {10.1016/j.jcat.2007.01.020}, author = {Bordoloi, Ankur and Lefebvre, F. and Halligudi, Shivaraj B.} } @article { ISI:000245141300028, title = {Synthesis and characterization of hindered amine light stabilizers based on end functionalization of polypropylene}, journal = {Journal of Applied Polymer Science}, volume = {104}, number = {3}, year = {2007}, month = {MAY}, pages = {1596-1602}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

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.

}, keywords = {end functionalization, functionalization of polymers, polymeric HALS, polypropylene, vinylidine and photostabilization}, issn = {0021-8995}, doi = {10.1002/app.25745}, author = {Reddy, K. Raghunatha and Kumar, Bijendra and Rana, Sravendra and Tevtia, Amit K. and Singh, R. P.} } @article { ISI:000246023000002, title = {Synthesis, characterization, and performance evaluation of polymeric hindered amine light stabilizers (HALS) in EPDM}, journal = {E-Polymers}, year = {2007}, month = {APR}, pages = {Article No. 038}, publisher = {EUROPEAN POLYMER FEDERATION}, type = {Article}, address = {1, QUAI LEZAY-MARNESIA, F067000 STRASBOURG, FRANCE}, abstract = {

Polymeric hindered amine light stabilizer (HALS), wherein the hindered amine functionality was attached to the brominated ethylene-propylene-diene terpolymer (EPDM) was synthesized. The brominated EPDM was synthesized as an intermediate for the synthesis of a new polymeric hindered amine light stabilizer. The grafting and functionalization reactions were characterized by FTIR and (HNMR)-H-1 spectroscopy. The photostabilizing efficiency of this polymeric HALS was studied and compared with conventional HALS under accelerated weathering conditions. The results of the study give evidence for superiority of polymeric HALS over that of melt blended conventional HALS.

}, keywords = {EPDM, Photostabilization, polymeric HALS}, issn = {1618-7229}, author = {Rana, Sravendra and Singh, Raj Pal} }