01711nas a2200217   4500008004100000022001400041245009400055210006900149260009800218300001400316490000700330520090200337653000901239653002001248653001901268653001801287100002101305700002201326700002101348856012401369       2006                        eng d  a0959-810300aNanocomposites of polypropylene impact copolymer and organoclays: role of compatibilizers0 aNanocomposites of polypropylene impact copolymer and organoclays  aTHE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLANDbJOHN WILEY & SONS LTDcNOV  a1270-12760 v553 a<p>Nanocomposites of polypropylene impact copolymer and organoclays were prepared using different compatibilizers (polypropylene-graft-(maleic anhydride) (PPMA), polyethylene-graft-(maleic anhydride) (PEMA) and their mixture) and varying percentages of clay (3 and 6%) in an attempt to obtain balanced mechanical properties. The nanocomposites were prepared by melt compounding and test specimens were prepared by injection molding. Mechanical properties such as tensile, flexural and Izod impact strength are reported. The clay dispersion was investigated using wide-angle X-ray diffraction while the phase morphology was characterized using scanning electron microscopy. It is shown that the mechanical properties of the system with mixed PPMA and PEMA compatibilizers showed the best balance of mechanical properties among the nanocomposites explored. (C) 2006 Society of Chemical Industry.</p>10aclay10acompatibilizers10aNanocomposites10apolypropylene1 aDeenadayalan, E.1 aVidhate, Shailesh1 aLele, Ashish, K.  uhttps://library.ncl.res.in/content/nanocomposites-polypropylene-impact-copolymer-and-organoclays-role-compatibilizers-001937nas a2200229   4500008004100000022001400041245006000055210005700115260006800172300001400240490000800254520118200262653001801444653002301462653001301485653003301498653002301531100002101554700002101575700002401596856008701620       2009                        eng d  a0021-899500aReactive extrusion of poly(L-Lactic Acid) with glycidol0 aReactive extrusion of polyLLactic Acid with glycidol  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAY  a1391-13980 v1123 a<p>Glycidol modified polylactic acid (PLLA) polymers have been prepared by reactive extrusion. Influences of residence time and the concentration of glycidol on the extent of reaction with different weight average molecular weight (45,000, 65,000, and 100,000) PLLA's were studied. Structure-property relationship has been established by measuring molecular, mesoscopic, and macroscopic properties. Under reactive extrusion conditions glycidol reacted with the end groups of PLLA to initiate chain extension. Low-molecular weight PLLA reacted with glycidol faster than the medium molecular weight PLLA, whereas high-molecular weight PLLA did not show significant reactions. The glass transition temperature, melting temperature, crystallization temperature, and heat of fusion were measured for unmodified and modified PLLA's. Chain extended PLLA had higher T(g) and T(m) than the unmodified samples. Time sweep rheological experiments were performed to test the melt stability of PLLA. Chain extended PLLA's were found to retain viscoelastic properties for much longer time than the unreacted samples. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 1391-1398, 2009</p>10abiodegradable10areactive extrusion10aRheology10astructure-property relations10aThermal properties1 aDeenadayalan, E.1 aLele, Ashish, K.1 aBalasubramanian, M.  uhttps://library.ncl.res.in/content/reactive-extrusion-polyl-lactic-acid-glycidol-001657nas a2200217   4500008004100000022001400041245008800055210006900143260007600212300001400288490000800302520087300310653002601183653001601209653001701225653001901242100002301261700001701284700002101301856011701322       2012                        eng d  a0021-899500aMechanical properties of polypropylene blended with esterified and alkylated lignin0 aMechanical properties of polypropylene blended with esterified a  aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAUG  a1701-17120 v1253 a<p>Lignin does not show miscibility with commercial polyolefins. Therefore, industrial waste lignin was modified in two different ways and subsequently blended with commercial polypropylene (PP) up to 25 wt %. A Brabender electronic plasticorder was used for melt mixing at 190 degrees C. The influence of different modifications on the mechanical properties and processing stability was studied for both polymer blends. The blends of PP and lignin modified (esterified) with maleic anhydride showed less deterioration in the mechanical properties compared to blends of PP and alkylated lignin with dichloroethane. Intermolecular interactions between the PP matrix and modified lignin were concluded on the basis of indicative values derived from various relevant theoretical models to the experimental data. (c) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012</p>10amechanical properties10amiscibility10amodification10apolymer blends1 aMaldhure, Atul, V.1 aEkhe, J., D.1 aDeenadayalan, E.  uhttps://library.ncl.res.in/content/mechanical-properties-polypropylene-blended-esterified-and-alkylated-lignin-001760nas a2200217   4500008004100000022001400041245006500055210006500120260007500185300001200260490000700272520100800279653001601287653001501303653002701318653003601345100001801381700002101399700002601420856009601446       2015                        eng d  a1566-254300aStudies on melt processable biocomposites of polylactic acid0 aStudies on melt processable biocomposites of polylactic acid  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGER/PLENUM PUBLISHERScSEP  a321-3330 v233 a<p>Melt processable microcrystalline cellulose (MCC)/poly(lactic acid) (PLA) composites were successfully prepared by twin-screw extrusion. Several characterization techniques were used to investigate the effect of MCC on rheological behavior, morphology, crystallization and melting behavior of the PLA and structure-property correlation of the MCC/PLA composites has been established. Rheological measurements showed that the addition of MCC has a dramatic influence on the low frequency relaxations of PLA chains and above 5 % of MCC, it forms percolated network structure. Differential scanning calorimeter analysis showed that MCC acted as nucleating agent enhancing crystallization below the percolation concentration. Properties of MCC/PLA composites have been compared with that of talc and CaCO3 filled composites. Talc is found to be more effective in crystallizing PLA than MCC and CaCO3. MCC/PLA composites are found be melt processable like that of talc and CaCO3 filled PLA composites.</p>10aBiopolymers10acomposites10aRheological properties10aStructure-property relationship1 aJoseph, Seena1 aDeenadayalan, E.1 aMahanwar, Prakash, A.  uhttps://library.ncl.res.in/content/studies-melt-processable-biocomposites-polylactic-acid-001786nas a2200193   4500008004100000245007700041210006900118260000800187300001400195490000700209520115700216100001901373700001801392700002101410700002201431700001801453700001801471856010301489       2017                        eng d00aPolylactic acid (PLA) biocomposites filled with waste leather buff (WLB)0 aPolylactic acid PLA biocomposites filled with waste leather buff  cDEC  a1099-11090 v253 aA large amount of leather waste is generated from tanning industries and most of which are disposed of landfill or discharged into the natural water bodies without any treatment, causing environmental problems. The aim of this study is to develop eco-biocomposites using waste leather buff (WLB) as filler in Polylactic acid (PLA) matrix to reduce the environmental issues and provide sustainable solution. WLB/PLA composites were prepared by twins-screw micro extruder varying the WLB content from 2% to 30 wt%. These composite were extensively characterise by several techniques. Tensile properties of the composites showed addition of WLB resulted in improvement of tensile property of composite and reduction in percentage crystallinity of PLA matrix observed with increase in WLB content. The effect of WLB on properties of interfacial adhesion and dispersion in WLB/PLA composites were studied by SEM. Wettability of composites was tested by contact angle and water absorption studies. WLB/PLA composite showed increase in water absorption with WLB loading. These WLB/PLA composite could be used to develop low cost eco-friendly product material.1 aAmbone, Tushar1 aJoseph, Seena1 aDeenadayalan, E.1 aMishra, Satyendra1 aJaisankar, S.1 aSaravanan, P.  uhttps://library.ncl.res.in/content/polylactic-acid-pla-biocomposites-filled-waste-leather-buff-wlb01653nas a2200193   4500008004100000245009100041210006900132260000800201300001400209490000700223520097900230100001801209700002301227700002601250700002201276700001801298700002101316856012201337       2017                        eng d00a Processing and characterization of waste leather based polycaprolactone biocomposites0 aProcessing and characterization of waste leather based polycapro  cDEC  a2889-28970 v383 aWaste leather buff (WLB) filled polycaprolactone (PCL) composites were prepared by twin-screw extrusion varying the WLB content from 2% to 40%. These composites were extensively characterized by several techniques in order to establish micro and macroscopic properties. Addition of WLB resulted in improvement of tensile modulus of neat PCL and reduction in percentage crystallinity of PCL matrix was observed with increase in WLB content. Interfacial adhesion and dispersion of WLB on PCL matrix was investigated using Scanning Electron Microscope. Percentage of water uptake increased with increase in concentration of WLB in the composite. These biodegradable composites could be used to develop low cost materials suitable for applications in footwear industry, for making bags, suitcases, etc., eliminating the environmental issues arising from WLB generated from tanneries in leather industry. POLYM. COMPOS., 38:2889-2897, 2017. (c) 2015 Society of Plastics Engineers1 aJoseph, Seena1 aAmbone, Tushar, S.1 aSalvekar, Abhijit, V.1 aJaisankar, S., N.1 aSaravanan, P.1 aDeenadayalan, E.  uhttps://library.ncl.res.in/content/processing-and-characterization-waste-leather-based-polycaprolactone-biocomposites