01851nas a2200253 4500008004100000022001400041245009500055210006900150260007300219300001400292490000800306520089500314653003401209653003001243653003301273653002501306653001601331100002001347700002401367700002401391700002401415700003301439856012501472 2012 eng d a0169-433200aEnhancing the hydrogen storage capacity of Pd-functionalized multi-walled carbon nanotubes0 aEnhancing the hydrogen storage capacity of Pdfunctionalized mult aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB a3405-34090 v2583 a

We demonstrate that the hydrogen storage capacity of multi-walled carbon nanotubes can be enhanced by polyvinylpyrrolidone functionalization. The polyvinylpyrrolidone acts as a stabilizing agent for Pd-nanoparticles, reduces their size and facilitates their uniform and enhanced loading onto multi-walled carbon nanotubes. According to sorption studies, the polyvinylpyrrolidone capping and consequent nanostructural modification enables 2.3 times more hydrogen adsorption than mere Pd-functionalization of multi-walled carbon nanotubes. Corresponding morphological changes before and after polyvinylpyrrolidone capping, characterized using Raman Spectroscopy, X-ray diffraction, TEM and thermal analysis techniques, are also presented. The results contribute towards increasing the efficiency of hydrogen based sustainable energy sources. (C) 2011 Elsevier B.V. All rights reserved.

10aHydrogen based energy sources10aHydrogen storage capacity10aMultiwalled carbon nanotubes10aPd functionalization10aPVP capping1 aSingh, Priyanka1 aKulkarni, Mukta, V.1 aGokhale, Suresh, P.1 aChikkali, Samir, H.1 aKulkarni, Chandrashekhar, V. uhttps://library.ncl.res.in/content/enhancing-hydrogen-storage-capacity-pd-functionalized-multi-walled-carbon-nanotubes-002389nas a2200265 4500008004100000022001400041245006000055210005900115260000800174300001200182490000700194520158300201653001901784653002801803653003301831653002301864653001101887100002701898700002401925700001801949700002401967700001901991700002402010856008902034 2023 eng d a1060-132500aEmerging trends in olefin polymerization: a perspective0 aEmerging trends in olefin polymerization a perspective cNOV a731-7500 v603 a

The seemingly matured field of olefin polymerization still poses several challenges and holds enormous potential to meet contemporary material requirements. In this feature article, we examine the progress of olefin polymerization in the last two decades. Among the several emerging trends, we identify four most impactful discoveries, namely, (i) disentangled ultra-high molecular weight polyethylene (dUHMWPE), (ii) disubstituted functional olefin copolymerization, (iii) incorporation of bioderived comonomers in polyolefins, and (iv) application of above (ii, iii) functional polyolefins as compatibilizers. The dUHMWPE has attracted significant attention and heterogeneous Ziegler-type catalysts, homogenous metallocene, and post-metallocene catalysts have been reported to produce disentangled ultrahigh molecular weight polyethylene. Insertion copolymerization of difunctional disubstituted olefins has been reported only recently and ortho-phosphinobenzene sulfonate palladium catalyst outperforms the other catalysts. Interestingly, insertion copolymerization of bioderived olefins has witnessed a surge in the number of reports. Sugar and plant oil-derived olefins have been copolymerized with ethylene to obtain relatively hydrophilic polyethylene. The functional polyethylene is finding a new application as compatibilizer or displays better adhesion to surfaces. Thus, the feature article offers a succinct account of emerging trends in polyolefins, identifies the most impactful contributions, and debates the application potential of these new materials.

10acompatibilizer10aFunctional polyethylene10aInsertion (co)polymerization10arenewable monomers10auHMWPE1 aBirajdar, Rajkumar, S.1 aBodkhe, Dnyaneshwar1 aGupta, Poonam1 aShaikh, Maulali, H.1 aRamekar, Rohan1 aChikkali, Samir, H. uhttps://library.ncl.res.in/content/emerging-trends-olefin-polymerization-perspective02202nas a2200265 4500008004100000022001400041245011700055210006900172260000800241490000700249520127100256653001701527653003001544653002601574653002301600653002801623100002101651700001601672700003101688700002001719700001701739700002401756700002401780856013201804 2025 eng d a0947-653900aElectrochemical deconstruction of waste polyvinylidene chloride (PVDC) to value-added products in batch and flow0 aElectrochemical deconstruction of waste polyvinylidene chloride  cFEB0 v313 a

Chlorinated polymers have made enormous contributions to materials science and are commercially produced on a large scale. These chlorinated polymers could be recycled as chlorine sources to efficiently produce valuable chlorinated compounds owing to their facile release of HCl. Although the thermal stability of PVDC is low compared to PVC, this can be advantageous in terms of easy and fast dehydrochlorination. Herein, we report an efficient electrochemical chlorination using poly(vinylidene chloride) (PVDC) as a chlorine source that works in an undivided cell and applies to a good number of examples. This method works on commodity polymers such as waste PVDC-PVC pharma blister film, PVDC-PO multilayer food packaging, and compression molded sheets of Ixan PVDC (with heat stabilizer) with similar efficiency. Furthermore, this method also provides the dechlorination of PVDC up to 98 %, leading to unsaturated dechlorinated material. Converting PVDC into more stable unsaturated compounds, the release of harmful chlorine-containing gases during incineration can be minimized. Additionally, this method is not only restricted to batch processes but an electroflow process for PVDC dechlorination and electrosynthesis has also been demonstrated.

10achlorination10aElectrochemical recycling10aElectroflow-synthesis10aGraphitic material10aPolyvinylidene chloride1 aMishra, Subhadip1 aKar, Sourav1 aRangappa, Raghavendrakumar1 aPatil, Prashant1 aKadam, Vijay1 aChikkali, Samir, H.1 aSamanta, Ramesh, C. uhttps://library.ncl.res.in/content/electrochemical-deconstruction-waste-polyvinylidene-chloride-pvdc-value-added-products-batch