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323667

Sigma-Aldrich

Ácido poli(acrílico)

Poly(acrylic acid)

Sinónimos:

PAA

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About This Item

Fórmula lineal:
(C3H4O2)n
Número de CAS:
9003-01-4
Número MDL:
MFCD00084394
Código UNSPSC:
12162002
ID de la sustancia en PubChem:
24859410
NACRES:
NA.23
En este momento no podemos mostrarle ni los precios ni la disponibilidad

mol peso

72.06 g/mol

viscosidad

≤2000 cP

temperatura de transición

Tg 106 °C

temp. de almacenamiento

2-8°C

cadena SMILES

[Na+].[O-]C(=O)C=C

InChI

1S/C3H4O2.Na/c1-2-3(4)5;/h2H,1H2,(H,4,5);/q;+1/p-1

Clave InChI

NNMHYFLPFNGQFZ-UHFFFAOYSA-M

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Descripción general

El ácido poli(acrílico) (PAA) es higroscópico, frágil e incoloro en la naturaleza con una Tg a casi 106oC. A temperaturas por encima de 200 a 250oC, pierde agua y se convierte en un anhídrido polimérico reticulado insoluble. La solubilidad del PAA seco en agua aumenta al aumentar las temperaturas. Las disoluciones concentradas de PAA en agua son de naturaleza tixotrópicas.

Aplicación

Entre las aplicaciones del PAA cabe incluir:
  • el estudio de la difusión de solutos en el hidrogel de copolímero de alcohol polivinílico/PAA[1]
  • la síntesis de un copolímero de poli(N-isopropilacrilamida)-bloque-PAA que responde a estímulos de temperatura y de pH[2]
  • en la preparación de un copolímero de bloque de oligo (metacrilato de metilo)/PAA para la administración micelar de medicamentos hidrófobos[3]
  • como espesante para adhesivos.

Código de clase de almacenamiento

11 - Combustible Solids

Clase de riesgo para el agua (WGK)

WGK 1

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable

Equipo de protección personal

Eyeshields, Gloves, type N95 (US)

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Certificados de análisis (COA)

Lot/Batch Number
0000427459
0000427459
0000427457
0000427457
0000409238

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Nan Liu et al.
Nanoscale, 11(14), 6794-6801 (2019-03-26)
Sodium gadolinium fluoride (NaGdF4) nanoparticles are promising candidates as T1 shortening magnetic resonance imaging (MRI) contrast agents due to the paramagnetic properties of the Gd3+ ion. Effects of size and surface modification of these nanoparticles on proton relaxation times have
T Inoue et al.
Journal of controlled release : official journal of the Controlled Release Society, 51(2-3), 221-229 (1998-08-01)
An AB block copolymer of oligo(methyl methacrylate) (oMMA) and poly(acrylic acid) (PAAc) has been synthesized. The block copolymer forms micelles in an aqueous medium, as confirmed by a fluorescence probe technique using pyrene. Doxorubicin hydrochloride was incorporated into the micelle
P L Zeeuwen et al.
The Journal of investigative dermatology, 116(5), 693-701 (2001-05-12)
Using serial analysis of gene expression on cultured human keratinocytes we found high expression levels of genes putatively involved in host protection and defense, such as proteinase inhibitors and antimicrobial proteins. One of these expressed genes was the recently discovered
A New Double-Responsive Block Copolymer Synthesized via RAFT Polymerization: Poly (N-isopropylacrylamide)-b lock-poly (acrylic acid)
Schili CM, et al.
Macromolecules, 37(21), 7861-7866 (2004)
Yanxia Wang et al.
International journal of pharmaceutics, 441(1-2), 170-180 (2012-12-15)
A novel galactose-decorated cross-linked micelles (cl-micelles) with ionic cores using cystamine (Cys) as a biodegradable cross-linker was prepared by using block ionomer complexes of poly(ethylene glycol)-b-poly(2-acryloxyethyl-galactose)-b-poly(acrylic acid) (PEG-b-PAEG-b-PAA) and Ca(2+) (PEG-b-PAEG-b-PAA cl-micelles/Cys). Doxorubicin (DOX) was successfully incorporated into the ionic
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Questions

1–10 of 11 Questions  

  1. What is the purity?

    1 answer

    1. Unfortunately, the purity of this product is not tested.

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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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  3. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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/449/386/product-dating-information-mk.pdf

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  4. What are the viscosity measurement conditions?

    1 answer

    1. As mentioned in the "Properties" section of the Product Detail Page, the viscosity specification is ≤2000 cP. The viscosity of this product is measured by Brookfield Viscosity method at 25 C. The exact value will be listed on the lot specific Certificate of Analysis.

      Please view the sample Certificate of Analysis: https://www.sigmaaldrich.com/certificates/sapfs/PROD/sap/certificate_pdfs/COFA/Q14/323667-250GSLCM5381.pdf

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  5. What is the Mw of Product 323667, is it also average Mw ~5,000?

    1 answer

    1. The average molecular weight of this product is ~2000.

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  6. What is the polydispersity of Product 323667, Poly(acrylic acid)?

    1 answer

    1. Unfortunately, polydispersity has not been determined for this product.

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  7. What is the Department of Transportation shipping information for this product?

    1 answer

    1. Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.

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  8. What solvents is Poly(acrylic acid), Product 323667, soluble in?

    1 answer

    1. This product is soluble in dioxane, ethanol, methanol, and water.

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  9. What is the appearance of Product 323667, Poly(acrylic acid)?

    1 answer

    1. This product is a powder or crystalline powder and/or chunks.

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  10. What are the end groups of the polymer Poly(acrylic acid), Product 323667?

    1 answer

    1. Unfortunately, the end groups are not tested for.

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1–10 of 11 Questions  

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