Unfortunately, the physical properties of this product, including thermal conductivity, specific heat capacity, and electrical dielectric strength, are not determined.
81367
Polyurethane
Selectophore™
Přihlásit pro zobrazení organizačních a smluvních cen.
Vybrat velikost
5 G
4 660,00 Kč
4 660,00 Kč
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Související kategorie
1 of 4
Tato položka | |||
|---|---|---|---|
| form beads | form foam | form foam | form foam |
| grade for ion-selective electrodes | grade - | grade - | grade - |
| product line Selectophore™ | product line - | product line - | product line - |
| Quality Level 200 | Quality Level - | Quality Level - | Quality Level - |
General description
Polyurethanes are a broad class of polymers which have urethane group (-NHCO-O-). Urethane group is formed by isocyanate reacting with hydroxyl groups.[1]
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Application
Polymeric membrane material for chemosensors and biosensors
Polyurethane was used as an outer coating membrane to increase stability and the linear range of the sensor during development of glutamate microbiosensor.[2] It may also be suitable in investigating the thermal degradation of α,γ-diphenyl alkyl allophanates and carbanilates for crosslinking sites using pyrolysis-high-resolution gas chromatography/FT-IR (Py-HRGC/FT-IR).[3]
Other Notes
Legal Information
Selectophore is a trademark of Merck KGaA, Darmstadt, Germany
Skladovací třída
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Již tento produkt vlastníte?
Dokumenty související s produkty, které jste v minulosti zakoupili, byly za účelem usnadnění shromážděny ve vaší Knihovně dokumentů.
Malika Ammam et al.
Biosensors & bioelectronics, 25(7), 1597-1602 (2009-12-26)
A highly sensitive and selective glutamate microbiosensor based on polypyrrole (PPy), multiwalled carbon nanotubes (MWCNT) and glutamate oxidase (GluOx) deposited on the transducer platinum electrode (Pt) is described. The sensor consists of a permselective membrane of polypyrrole for the rejection
Thermal degradation mechanism of a, ?-diphenyl alkyl allophanate as a model polyurethane by pyrolysis-high-resolution gas chromatography/FT-IR.
Yoshitake, Norimichi, and Mutsuhisa Furukawa.
Journal of Analytical and Applied Pyrolysis, 33, 269-281 (1995)
S Y Yun et al.
Analytical chemistry, 69(5), 868-873 (1997-03-01)
Potentiometric responses of polyurethane (PU)-based membranes containing valinomycin and varying amounts of plasticizer (DOA) and/or lipophilic additive (KTpClPB) were examined as a function of soft segment [poly(tetramethylene ether glycol)] contents in aromatic diisocyanate-based PU matrices. Upon increasing the weight percentages
M.E. Meyerhoff et al.
Polym. Mater. Sci. Eng., 64, 293-293 (1991)
Polyurethane elastomers.
Petrovic, Zoran S., and James Ferguson.
Progress in Polymer Science, 16, 695-836 (1991)
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Hello, can you tell me about itis physical properties? Thermal conductivity Specific heat capacity Electrical dielectric strength
1 answer-
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How can I determine the shelf life / expiration / retest date of this product?
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If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdfHelpful?
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Could you tell me the degree of polymerization of polyurethane?
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The degree of polymerization is not determined for this product.
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What size are the beads?
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The particle size has not been determined.
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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Could you provide the chemical structure of this PU?
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Unfortunately, the specific structure of this material is not available. This polymer is an aliphatic thermoplastic polyurethane.
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Hello, I brought PU materials from this site ,there is no information about electrical property.I want to the PU diellectric constant at 1 kHz.Please can you provde me?
1 answer-
Unfortunately, information regarding the electrical properties of our Polyurethane beads (Product 81367), such as the dielectric constant is not determined.
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Hello my dear. How much is the molecular weight of this polyurethane
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The molecular weight of this item is approximately 100,000 Daltons.
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