02828nas a2200241   4500008004100000022001400041245019400055210006900249260006700318300001400385490000700399520183400406653002702240653002902267653002602296653002302322653002702345653002302372100002202395700002602417700001802443856012502461       2011                        eng d  a1042-714700aNovel synthesis of nano-calcium carbonate (CaCO3)/polystyrene (PS) core-shell nanoparticles by atomized microemulsion technique and its effect on properties of polypropylene (PP) composites0 aNovel synthesis of nanocalcium carbonate CaCO3polystyrene PS cor  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcDEC  a2571-25820 v223 a<p>Calcium carbonate (CaCO3)/polystyrene (PS) nanoparticles (&lt; 100 nm) with core-shell structure were synthesized by atomized microemulsion technique. The polymer chains were anchored onto the surface of nano-CaCO3 through triethoxyvinyl silane (TEVS) as a coupling agent. Ammonium persulfate (APS), sodium dodecyl sulfate (SDS) and n-pentanol were used as initiator, surfactant, and cosurfactant, respectively. Polymerization mechanism of core-shell latex particles was discussed. Encapsulation of nano-CaCO3 by PS was confirmed by using transmission electron microscope (TEM). Grafting percentage of core-shell particles was investigated by Thermogravimetric Analyzer (TGA). Nano-CaCO3/PS core-shell particles were characterized by Fourier transform infrared (FTIR) spectrophotometer and differential scanning calorimeter (DSC). The results of FTIR revealed existence of a strong interaction at the interface of nano-CaCO3 particle and PS, which implies that the polymer chains were successfully grafted onto the surface of nano-CaCO3 particle through the link of the coupling agent. In addition, TGA and DSC results indicated an enhancement of thermal stability of core-shell materials compared with the pure nano-PS. Nano-CaCO3/PS particles were blended with polypropylene (PP) matrix on Brabender Plastograph by melt process with different wt% of loading (i.e. 0.1-1 wt%). The interfacial adhesion between nano-CaCO3 particles and PP matrix was significantly improved when the nano-CaCO3 particles were grafted with PS, which led to increased thermal, rheological, and mechanical properties of (nano-CaCO3/PS)/PP composites. Scanning electron microscope (SEM) and atomic force microscope (AFM) images showed a perfect dispersion of the nano-CaCO3 particles in PP matrix. Copyright (C) 2011 John Wiley &amp; Sons, Ltd.</p>10aatomized microemulsion10acore-shell nanoparticles10amechanical properties10apolypropylene (PP)10aRheological properties10aThermal properties1 aMishra, Satyendra1 aChatterjee, Aniruddha1 aSingh, RajPal  uhttps://library.ncl.res.in/content/novel-synthesis-nano-calcium-carbonate-caco3polystyrene-ps-core-shell-nanoparticles-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-002195nas a2200301   4500008004100000022001400041245016600055210006900221260001000290300001200300490000800312520113100320653001501451653002401466653003101490653002701521653001901548100002001567700002501587700001601612700002201628700002101650700002701671700002401698700002501722700002101747856012501768       2018                        eng d  a0304-885300aSingle step, phase controlled, large scale synthesis of ferrimagnetic iron oxide polymorph nanoparticles by thermal plasma route and their rheological properties0 aSingle step phase controlled large scale synthesis of ferrimagne  cMAR 1  a232-2420 v4493 a<p>In this paper we report single step large scale synthesis of highly crystalline iron oxide nanoparticles viz. magnetite (Fe3O4) and maghemite (gamma-Fe2O3) via gas phase condensation process, where micron sized iron metal powder was used as a precursor. Selective phases of iron oxide were obtained by variation of gas flow rate of oxygen and hence partial pressure of oxygen inside the plasma reactor. Most of the particles were found to possesses average crystallite size of about 20-30 nm. The DC magnetization curves recorded indicate almost super-paramagnetic nature of the iron oxide magnetic nanoparticles. Further, iron oxide nanoparticles were analyzed using Raman spectroscopy, X-ray photoelectron spectroscopy and Mossbauer spectroscopy. In order to explore the feasibility of these nanoparticles for magnetic damper application, rheological studies have been carried out and compared with commercially available Carbonyl Iron (CI) particles. The nanoparticles obtained by thermal plasma route show improved dispersion which is useful for rheological applications. (C) 2017 Elsevier B.V. All rights reserved.</p>10aIron oxide10amagnetic properties10aNano-crystalline materials10aRheological properties10aThermal plasma1 aRaut, Suyog, A.1 aMutadak, Pallavi, R.1 aKumar, Shiv1 aKanhe, Nilesh, S.1 aHuprikar, Sameer1 aPol, Harshawardhan, V.1 aPhase, Deodatta, M.1 aBhoraskar, Sudha, V.1 aMathe, Vikas, L.  uhttps://library.ncl.res.in/content/single-step-phase-controlled-large-scale-synthesis-ferrimagnetic-iron-oxide-polymorph