01687nas a2200265   4500008004100000022001400041245012000055210006900175260008600244300001400330490000800344520071500352653002701067653002101094653001901115100002601134700002001160700001901180700001801199700001301217700002201230700002301252700001801275856012801293       2005                        eng d  a1060-132500aPhotodegradation of ethylene/propylene/polar monomers co- and terpolymers. I - Prepared by group 4 catalyst systems0 aPhotodegradation of ethylenepropylenepolar monomers co and terpo  a325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcSEP  a1259-12700 vA423 a<p>The photooxidative degradation behavior of polyethylene, its copolymers (propylene/polar monomers) and terpolymers, synthesized by a group 4 catalyst system, has been studied by Fourier transform infrared spectroscopy and confirmed with scanning elecrton microscopy for morphological changes. The kinetics of photodegradation has also been studied. Surface damage caused by polychromatic (&gt;= 290 nm) at 55 degrees C in air is presented in different micrographs. The rate of photodegradation is very fast in terpolymers containing polar monomers as compared with copolymers and polyethylene. Morphological study of these photodegraded samples showed a very good relation with photodegradation results.</p>10afunctional polyolefins10aPhotodegradation10aUV irradiation1 aFernandes, Susete, N.1 aCorreia, Sandra1 aPrasad, A., V.1 aReddy, K., R.1 aRana, S.1 aLonkar, Sunil, P.1 aMarques, Maria, M.1 aSingh, R., P.  uhttps://library.ncl.res.in/content/photodegradation-ethylenepropylenepolar-monomers-co-and-terpolymers-i-prepared-group-4-001649nas a2200205   4500008004100000022001400041245014100055210006900196260006800265300001000333490000700343520086500350100001801215700001801233700001301251700002201264700001701286700001801303856012201321       2005                        eng d  a1083-560100aSynthesis, characterization, and performance evaluation of novel stabilized TDI-based polyurethane coatings under accelerated weathering0 aSynthesis characterization and performance evaluation of novel s  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAR  a13-200 v113 a<p>Some toluene dilsocyanate (TDI)-based polyurethane resins (PURs) for coating applications were synthesized with castor oil and their performance was estimated under accelerated UV weathering with and without a novel UV absorber. Changes in physical properties, chemical structure, and color of the samples were monitored by mechanical property testing, FTIR spectroscopy, and colorimetry, respectively. A stable polyurethane coating was achieved at 0.5% concentration of additive in the host matrix. Mechanical properties were also retained as in the pristine PUR after mixing. Commercial Tinuvin P and benzotriazole-based novel UV absorbers were found to improve the photoresistance of the PUR coating, and the highest efficiency of the novel UV absorber against weathering was estimated at 0.5 wt% concentration.(c) 2005 Society of Plastics Engineers.</p>1 aKumar, A., P.1 aReddy, K., R.1 aRana, S.1 aLonkar, Sunil, P.1 aRaut, K., G.1 aSingh, R., P.  uhttps://library.ncl.res.in/content/synthesis-characterization-and-performance-evaluation-novel-stabilized-tdi-based-001691nas 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-001679nas a2200217   4500008004100000022001400041245011400055210006900169260010000238300001200338490000600350520084700356653000901203653003001212653002001242653002301262100001401285700001301299700001801312856013101330       2007                        eng d  a1788-618X00aPhoto-oxidation of EPDM/layered double hydroxides composites: influence of layered hydroxides and stabilizers0 aPhotooxidation of EPDMlayered double hydroxides composites influ  aDEPT POLYMER ENG, MUEGYETEM RKP 3, BUDAPEST, H-1111, HUNGARYbBUDAPEST UNIV TECHNOL & ECONcNOV  a748-7540 v13 a<p>The photo-oxidation of ethylene propylene diene monomer (EPDM)/layered double hydroxide (LDH) composites as well as EPDM/LDH with stabilizers is studied under accelerated UV irradiation (lambda &gt;= 290 nm) at 60 degrees C for different time intervals. The development of functional groups during oxidation was monitored by FT-IR spectroscopy. The photo-degradation of the pristine polymer and composites take place and the increase in hydroxyl and carbonyl groups with irradiation times, was estimated. EPDM filled LDH showed higher degradation rate than pristine EPDM, while in acidic medium EPDM/LDH showed almost equal degradation as in isolated conditions. These results show the advantages of LDHs as a filler as well as an acid killer. The effect of stabilizers is very less because of their concentration in comparison of LDH.</p>10aEPDM10alayered double hydroxides10aPhoto-oxidation10apolymer composites1 aKumar, B.1 aRana, S.1 aSingh, R., P.  uhttps://library.ncl.res.in/content/photo-oxidation-epdmlayered-double-hydroxides-composites-influence-layered-hydroxides-and-0