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Polymer - Wikipedia

Polymer - Wikipedia

A polymer (/ ˈ p ɒ l ɪ m ər /; Greek poly-, many + -mer, part) is a substance or material consisting of very large molecules, or macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as …

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Electrocatalytic upcycling of polyethylene terephthalate ...

Electrocatalytic upcycling of polyethylene terephthalate ...

Aug 17, 2021 Particularly, the cost of formic acid production from electrocatalytic carbon dioxide reduction (CO 2 RR) is estimated to be ~180 $ ton −1, lower than the market price (400 $ …

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Properties and Applications of Polyvinyl Alcohol ...

Properties and Applications of Polyvinyl Alcohol ...

Dec 19, 2015 1. Introduction. Polyvinyl alcohol (PVA), which is essentially made from polyvinyl acetate through hydrolysis, is easily degradable by biological organisms and in water is a solubilized crystalline structure polymer [].PVA is an artificial polymer that has been used during the first half of the 20th century worldwide.

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An overview of photocatalytic degradation: photocatalysts ...

An overview of photocatalytic degradation: photocatalysts ...

Dec 21, 2019 Photocatalysis is an ecofriendly technique that emerged as a promising alternative for the degradation of many organic pollutants. The weaknesses of the present photocatalytic system which limit their industrial applications include low-usage of visible light, fast charge recombination, and low migration ability of the photo-generated electrons and holes. …

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Separation processes - processdesign

Separation processes - processdesign

Feb 23, 2016 Every crystallization process is a unique system, so plant evaluation is usually required before complete implementation. Crystallization can be performed in both batch and continuous processes, and design features can control crystal size to an extent (Peters Timmerhaus, 2003). Membrane Separation

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A cost-effective and humidity-tolerant chloride solid ...

A cost-effective and humidity-tolerant chloride solid ...

Jul 20, 2021 The raw-material cost of Li 2 ZrCl 6 at 50 μm thickness is found to be $1.38/m 2, which is much lower than that for Li 3 YCl 6 ($23.05/m 2), i.e., the cheapest chloride system in literature, and ...

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High thermoelectric performance in low-cost SnS0.91Se0.09 ...

High thermoelectric performance in low-cost SnS0.91Se0.09 ...

Sep 27, 2019 High-performance thermoelectrics are often the widely studied group IV–VI compounds, such as GeTe (), PbTe (7, 12, 24), PbSe (25, 26), PbS (), and SnTe (8, 28).The scarcity of Ge and Te, combined with the toxicity of Pb, makes compounds such as SnSe promising thermoelectric materials, as they do not contain these elements.Moreover, SnSe …

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Sodium-Cooled Fast Reactor - an overview ScienceDirect ...

Sodium-Cooled Fast Reactor - an overview ScienceDirect ...

Sodium-cooled fast reactor (SFR) hexagonal wrapper tubes are designed to operate in the temperature range of 400–600C under a high neutron flux of 10 15 n/cm 2 /s. Austenitic stainless steel presently used for the wrapper tubes undergoes significant dimensional changes in terms of bowing of the fuel subassemblies due to differential void swelling originating from the uneven …

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Saponification - an overview ScienceDirect Topics

Saponification - an overview ScienceDirect Topics

The proposed scheme included fractionation after LC and HPGC separation of stigmasta-3,5-diene, squalene isomers and wax esters. Tsimidou and coworkers (Nenadis and Tsimidou, 2002; Grigoriadou et al., 2007) introduced fractional crystallization as a rapid, low-cost alternative in sample preparation prior to RP-HPLC determination of squalene.

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