Functionality Determination of Binder Prepolymers

Muenker, A. H.; Hudson, Boyd E.

doi:10.21236/ad0847505

Cited by 4 publications

(9 citation statements)

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“…The coating can be directly deposited by arc plasma or flame spraying on a suitable high-temperature alloy or be dispersed into an organic silicate, painted onto the substrate, and cured in air at 200°C to 300°C. The absorptance remained greater than 0.90 even after exposure for 24 h to 700°C in air for solar-absorber coatings prepared using commercially available silicate binders, however the emittance stability was not reported [201]. The absorptance remained at 0.95 below 4 microns, after repeated high-temperature cycling (heated to 980°-1060°C and cooled to ambient for 1 h) for a high nickel-molybdenum alloy coated with a lithium-zinc ferrite [having the composition (Li 0.5 Fe 0.5 ) 0.9 Zn 0.1 Fe 2 O 4 ] by an arc plasma spray system [201].…”

Section: 2c41mentioning

confidence: 92%

“…The absorptance remained greater than 0.90 even after exposure for 24 h to 700°C in air for solar-absorber coatings prepared using commercially available silicate binders, however the emittance stability was not reported [201]. The absorptance remained at 0.95 below 4 microns, after repeated high-temperature cycling (heated to 980°-1060°C and cooled to ambient for 1 h) for a high nickel-molybdenum alloy coated with a lithium-zinc ferrite [having the composition (Li 0.5 Fe 0.5 ) 0.9 Zn 0.1 Fe 2 O 4 ] by an arc plasma spray system [201]. It has been calculated that at a solar concentration of 1000, these metal oxide ferrite coatings are more efficient than a selective coating with an absorptance of 0.85 and an emittance of 0.1 up to 870°C [201].…”

Section: 2c41mentioning

confidence: 92%

“…High-temperature solar-selective coatings comprising thermally stable metal oxides and ferrites mixtures have solar absorptance greater than 0.9 at wavelengths from 0.35 to 3.0 microns and solar emittance greater than 0.45 at wavelengths greater than 3 microns [201]. The metal oxides are generally represented as M b O c , where M is selected from nickel, cobalt, strontium, and molybdenum and where b is a number from 1 to 3 and c is a number from 1 to 4 (e.g., Co 3 O 4 .…”

Section: 2c41mentioning

confidence: 99%

“…The absorptance remained at 0.95 below 4 microns, after repeated high-temperature cycling (heated to 980°-1060°C and cooled to ambient for 1 h) for a high nickel-molybdenum alloy coated with a lithium-zinc ferrite [having the composition (Li 0.5 Fe 0.5 ) 0.9 Zn 0.1 Fe 2 O 4 ] by an arc plasma spray system [201]. It has been calculated that at a solar concentration of 1000, these metal oxide ferrite coatings are more efficient than a selective coating with an absorptance of 0.85 and an emittance of 0.1 up to 870°C [201]. At 680°C, the metal oxide ferrite coating has net equivalent energy gains to a selective coating with α/ε(100°C)=0.9/0.1.…”

Section: 2c41mentioning

confidence: 99%

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Review of Mid- to High-Temperature Solar Selective Absorber Materials

Kennedy¹

2002

449

311

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Section: 2c41mentioning

confidence: 92%

Section: 2c41mentioning

confidence: 92%

Section: 2c41mentioning

confidence: 99%

Section: 2c41mentioning

confidence: 99%

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Review of Mid- to High-Temperature Solar Selective Absorber Materials

Kennedy¹

2002

449

311

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“…The intensity of a band a t 3570 cm-' was used for that analysis [87]. The intensity of a band a t 3570 cm-' was used for that analysis [87].…”

Section: ! -------------mentioning

confidence: 99%

Determination of hydroxyl groups in polymers. Review

Boiko¹,

Grischenko²

1985

Acta Polymerica

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The analysis of hydroxyl groups in polymers is reviewed. Recent achievements of chemical, physico-chemical and physical methods for the determination of hydroxyl groups and their differentiation by reactivity have been examined. Particularly, infrared spectroscopy and nuclear magnetic resonance used for this determination are considered. Die Bestimmung yon Hydroxylgruppen in Polymeren. FortschrittsberichtIn dem Bericht werden neuere Entwicklungen chemischer, physikalisch-chemischer und physikalischer Methoden zur Bestimmung von Hydroxylgruppen und ihrer Differenzierung hinsichtlich der Reaktivitat dargestellt. Insbesondere wird die Anwendung der Infrarotspektroskopie und der magnetischen Kernresonanz behandelt. Onpeaenenue zur3powuJabnwx zpynn 8 nom.wepax. O630p 0 6 3 0~ IIOCBfiQeH aHaJIH8y rHAPOKCHnbHhIX rpynn B IIOJIEiMepaX. PaCCMOTpeHbI IlOCJIeAHlle AOCTEiXeHllfi XHMH9eCKHX, @H3HHO-XHMH9eCHHX Ei @H3H4eCKHX MeTOAOB KOJIEi9eCTBeHHOrO OIIpeAeneHElH I' HApOKCHJIbHbIX I'pyIIII H HX AH@-@epeHqEi~EiEinOpeaKqHOHHOltCnOCO6HOCTH. ~C O 6 O~B H l l M~H H~~~~j I~H O H H @~~K~~C H O~C I I~K T~O C MarHHTHOMY pe30HaHCy. Chemical methods of analysisChemical methods a r e simple a n d accessible, t h e y do not require special equipment a n d expensive instruments. At t h e same t i m e t h e y a r e rather time-consuming a n d require considerable amounts of t h e substance t o be analyzed. These methods can mainly give quantitative information. If t h e differentiation of HG is necessary, they become much more time-consuming. Recently t h e effective methods of chemical analysis have appeared which enable HG t o b e determined rapidly a n d exactly enough. Acylation of HG is most widely used, its application for polymers is detailed in t h e handbooks o n polymer analysis. The classical acylation procedure [27, 281 uses acetic (AA) or phthalic anhydride (PA) in pyridine solution, t h e latter being t h e solvent and catalyst of t h e reaction. T h e use of propionic [29], succinic [30--321, nitrobenzoic [33], osulfobenzoic [34], nitrophthalic [35]anhydrides for t h e same purpose is described. As a rule, primary a n d secondary HG a r e fully acylated within 1 t o 2 h a t 100 t o 115°C. Pyromellitic dianhydride (PMDA) [36-381 is more effective. It has as high activity as AA a n d does not interact with aldehyde groups a n d phenolic HG which is characteristic of PA. Dimethylsulfoxide (DMSO) is especially recommended as a solvent [37].T o acylate HG, more active acyl chlorides can b e used. BOIKO and GRISHCHENKO:Deterinination of liydroryl groups in polymers. Review Acta Polymcrica 36 (1985) Nr. 9

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Preparative scale isocratic chromatographic purification of a polyethylene mono‐alcohol accompanied by high resolution evaluation of molecular weight distribution

MacDonald

Sherrington

2012

J of Applied Polymer Sci

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A simple preparative-scale adsorption chromatographic method for separating a commercially available polyethylene mono-alcohol from its non-functional polyethylene impurities has been established using silica as the stationary phase and toluene at 75°C as the isocratic eluant. Characterization of the chromatographic fractions by 1H-NMR spectroscopy also provided unexpected comprehensive information on the molecular structure and molar mass distribution of the polyethylene mono-alcohol

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Functionality Determination of Binder Prepolymers

Cited by 4 publications

References 0 publications

Review of Mid- to High-Temperature Solar Selective Absorber Materials

Review of Mid- to High-Temperature Solar Selective Absorber Materials

Determination of hydroxyl groups in polymers. Review

Preparative scale isocratic chromatographic purification of a polyethylene mono‐alcohol accompanied by high resolution evaluation of molecular weight distribution

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