01891nas 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-0