01984nas a2200253   4500008004100000022001400041245006900055210006800124260009900192300001400291490000700305520111100312653000901423653001801432653002401450653001801474100002901492700002201521700002301543700002001566700001801586700002401604856010201628       2006                        eng d  a0141-391000aPhotooxidation of vulcanized EPDM/montmorillonite nanocomposites0 aPhotooxidation of vulcanized EPDMmontmorillonite nanocomposites  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcDEC  a3033-30390 v913 a<p>The photooxidation of a vulcanized ethylene-propylene-diene monomer (EPDM)/montmorillonite nanocomposite as well as EPDM/nanocomposite with stabilizers was studied under accelerated UV-light irradiation (lambda &gt;= 300 nm, 60 degrees C) for different times. The development of functional groups during oxidation was monitored by infrared spectroscopy. Photodegradation of the neat polymer and composites took place and the increases of absorbance in hydroxyl and carbonyl groups with irradiation times and also the decreases of the EPDM unsaturations were measured. The data indicated that the photooxidation products were not changed in the presence of the nanofiller. However, the presence of MMt was observed to dramatically enhance the rate of photooxidation of EPDM with a shortening of the oxidation induction time, leading to a decrease of the durability of the nanocomposites. On the other hand, it was observed that addition of stabilizers, either Tinuvin P or 2-mercaptobenzimidazole, was efficient in inhibiting the degradative effect of MMt. (c) 2006 Elsevier Ltd. All rights reserved.</p>10aEPDM10aNanocomposite10aphotooxidation rate10astabilization1 aMorlat-Therias, Sandrine1 aFanton, Elisabeth1 aTomer, Namrata, S.1 aRana, Sravendra1 aSingh, R., P.1 aGardette, Jean, Luc  uhttps://library.ncl.res.in/content/photooxidation-vulcanized-epdmmontmorillonite-nanocomposites-001891nas a2200253   4500008004100000022001400041245009500055210006900150260008700219300001200306490000700318520100000325653001901325653001601344653000901360653002201369653001901391653001901410100002001429700002101449700002001470700001801490856012901508       2006                        eng d  a0892-705700aPreparation and performance evaluation of EPDM nanocomposites under accelerated weathering0 aPreparation and performance evaluation of EPDM nanocomposites un  a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcSEP  a461-4740 v193 a<p>The degradability of ethylene propylene diene monomer (EPDM) nanocomposites, prepared from organically modified montmorillonite (CMMT), is studied under accelerated UV irradiation (lambda &gt;= 290 nm) for different time intervals. The development of functional groups during degradation is monitored by FT-IR spectroscopy whereas, surface changes are studied by scanning electron microscopy (SEM). The effect of clay modifier and clay concentration on the degradability are studied. The degradation of neat polymer and composites taking place traditionally and an increase in carbonyl and hydroxyl groups are observed with irradiation time. Neat EPDM is found to be less degradable than nanocomposites. Degradation products, as seen by FT-IR in nanocomposites are found to be the same as in neat polymer but are generated at a faster rate. According to the experimental results, one can define that both ammonium ion and neat montmorillonite (MMT) accelerate the photo-oxidation of EPDM.</p>10acarbonyl index10aDegradation10aEPDM10alayered silicates10aNanocomposites10aphotooxidation1 aRana, Sravendra1 aTevtia, Amit, K.1 aKumar, Bijendra1 aSingh, R., P.  uhttps://library.ncl.res.in/content/preparation-and-performance-evaluation-epdm-nanocomposites-under-accelerated-weathering-001432nas a2200181   4500008004100000022001400041245012100055210006900176260008900245300002000334520068100354653000901035653002301044653001901067100002001086700002001106856012401126       2007                        eng d  a1618-722900aSynthesis, characterization, and performance evaluation of polymeric hindered amine light stabilizers (HALS) in EPDM0 aSynthesis characterization and performance evaluation of polymer  a1, QUAI LEZAY-MARNESIA, F067000 STRASBOURG, FRANCEbEUROPEAN POLYMER FEDERATIONcAPR  aArticle No. 0383 a<p>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.</p>10aEPDM10aPhotostabilization10apolymeric HALS1 aRana, Sravendra1 aSingh, Raj, Pal  uhttps://library.ncl.res.in/content/synthesis-characterization-and-performance-evaluation-polymeric-hindered-amine-light