01679nas 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-001934nas a2200265   4500008004100000022001400041245015900055210006900214260005700283300001200340490000700352520097600359653001301335653001701348653001801365653001501383653002501398100001701423700002401440700002001464700001401484700002201498700001801520856013001538       2010                        eng d  a1598-503200aEnhancement of thermal stability and phase relaxation behavior of chitosan dissolved in aqueous l-lactic acid: using `silver nanoparticles' as nano filler0 aEnhancement of thermal stability and phase relaxation behavior o  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcAUG  a713-7200 v183 a<p>Chitosan films with various compositions of silver nanoparticles were prepared by solution casting with an aqueous solution of chitosan and l-lactic acid. The chitosan/Ag nanocomposites were characterized by wide angle Xray diffraction (WAXD) and UV-vis spectroscopy. An analysis of the surface topography and size of the Ag nanoparticles (&lt;= 100 nm) were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. Thermogravimetric analysis (TGA/DTA) confirmed the increase in thermal stability with increasing Ag nanoparticle content in the nanocomposites. Dynamic thermal analysis (DMA) was used to examine the phase relaxation behavior of chitosan and its nanocomposites. The conductivity of chitosan/Ag nanocomposites was considered with respect to the frequency. Contact angle measurements were used to characterize the surface twistability, surface cleanliness, and hydrophilic/hydrophobic nature of the surface.</p>10aChitosan10aconductivity10acontact angle10arelaxation10asilver nanoparticles1 aRana, V., K.1 aPandey, Asutosh, K.1 aSingh, Raj, Pal1 aKumar, B.1 aMishra, Satyendra1 aHa, Chang-Sik  uhttps://library.ncl.res.in/content/enhancement-thermal-stability-and-phase-relaxation-behavior-chitosan-dissolved-aqueous-l-0