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.pdf
Fortfahren mit
190845
Poly(1-vinylpyrrolidon-co-vinylacetat)
average Mw ~50,000 (GPC vs. poly(ethylene oxide)), powder
Synonym(e):
PVP-VA copolymer
Größe auswählen
| Ihnen/SKU | Verfügbarkeit | Preis |
|---|---|---|
250 g | Warenkorb auf Verfügbarkeit prüfen | € 174,00 |
Über diesen Artikel
form
powder
Quality Segment
mol wt
average Mw ~50,000 (GPC vs. poly(ethylene oxide))
transition temp
Tg 64 °C
density
1.27 g/mL at 25 °C (lit.)
SMILES string
N1(CCCC1=O)C=C.O(C(=O)C)C=C
InChI
1S/C6H9NO.C4H6O2/c1-2-7-5-3-4-6(7)8;1-3-6-4(2)5/h2H,1,3-5H2;3H,1H2,2H3
InChI key
FYUWIEKAVLOHSE-UHFFFAOYSA-N
Application
It can be used to preparepolymer blend membranes for pervaporation separation of ethanol and2-ethylhexanol mixtures.
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Dieser Artikel | |||
|---|---|---|---|
| form powder | form powder | form powder | form powder |
| density 1.27 g/mL at 25 °C (lit.) | density - | density - | density - |
| mol wt average Mw ~50,000 (GPC vs. poly(ethylene oxide)) | mol wt average Mw 100,000-500,000 | mol wt average Mn ~311,000, average Mw ~1,080,000 | mol wt average Mn ~80,000, average Mw ~216,000 |
| Quality Level 200 | Quality Level 100 | Quality Level 200 | Quality Level 100 |
| transition temp Tg 64 °C | transition temp Tg 235 °C | transition temp - | transition temp - |
Lagerklasse
11 - Combustible Solids
wgk
WGK 1
ppe
Eyeshields, Gloves, type N95 (US)
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How can I determine the shelf life / expiration / retest date of this product?
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Helpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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
Helpful?
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Is product 190845 a block copolymer or a random copolymer? Additionally, what is the Vinyl Acetate content in the polymer?
1 answer-
This copolymer is a linear, random copolymer produced by the free-radical polymerization of vinyl acetate (VA) to vinylpyrrolidone (VP). The polymer has no free vinyl acetate present, but the ratio of polymer vinylpyrrolidone to polymer vinyl acetate is 6:4.
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