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-001980nas a2200277   4500008004100000022001400041245010100055210006900156260000800225300001400233490000700247520102500254653002901279653002201308653002101330653002101351653002301372100002701395700002901422700001501451700002301466700003101489700002301520700003001543856012901573       2018                        eng d  a1433-785100aFlexible composite mechanical energy harvester from a ferroelectric organoamino phosphonium salt0 aFlexible composite mechanical energy harvester from a ferroelect  cJUL  a9054-90580 v573 a<p>A new binary organic salt diphenyl diisopropylamino phosphonium hexaflurophosphate (DPDPPF6) was shown to exhibit a good ferroelectric response and employed for mechanical energy harvesting application. The phosphonium salt crystallizes in the monoclinic noncentrosymmetric space group Cc and exhibits an H-bonded 1D chain structure due to N-HF interactions. Ferroelectric measurements on the single crystals of DPDPPF6 gave a well-saturated rectangular hysteresis loop with a remnant (P-r) polarization value of 6Ccm(-2). Further, composite devices based on polydimethylsiloxane (PDMS) films for various weight percentages (3, 5, 7, 10 and 20wt%) of DPDPPF6 were prepared and examined for power generation by using an impact test setup. A maximum output peak-to-peak voltage (V-PP) of 8.5V and an output peak-to-peak current (I-PP) of 0.5A was obtained for the non-poled composite film with 10wt% of DPDPPF6. These results show the efficacy of organic ferroelectric substances as potential micropower generators.</p>10abinary phosphonium salts10aenergy conversion10aferroelectricity10ahydrogen bonding10apolymer composites1 aVijayakanth, Thangavel1 aSrivastava, Anant, Kumar1 aRam, Farsa1 aKulkarni, Priyangi1 aShanmuganathan, Kadhiravan1 aPraveenkumar, Balu1 aBoomishankar, Ramamoorthy  uhttps://library.ncl.res.in/content/flexible-composite-mechanical-energy-harvester-ferroelectric-organoamino-phosphonium-salt