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535311

Sigma-Aldrich

Poly(N-isopropylacrylamide)

Mn ~40,000

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Synonym(s):
NIPAM polymer, PNIPAM, Polyacrylamide, polyNIPAM
Linear Formula:
CH3(C6H11NO)nCH3
CAS Number:
MDL number:
PubChem Substance ID:

mol wt

Mn 20,000-60,000
Mn ~40,000

Quality Level

mp

96 °C

SMILES string

CC(C)NC(=O)C=C

InChI

1S/C6H11NO/c1-3-5-7-6(8)4-2/h4H,2-3,5H2,1H3,(H,7,8)

InChI key

WDFKEEALECCKTJ-UHFFFAOYSA-N

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This Item
724823724831724858
mol wt

Mn 20,000-60,000

mol wt

Mn 2000-3000 (by HCL Titration)

mol wt

average Mn 5,500 (HCl titration)

mol wt

Mn 60,000

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

Application

Thermosensitive polymer, can be used to form a hydrogel. Aqueous polymer solution undergoes a phase transition from a soluble to an insoluble state when the temperature is raised to ca. 32 °C.

Physical form

Thermosensitive polymer, hydrogel

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Manuel Pernia Leal et al.
ACS nano, 6(12), 10535-10545 (2012-11-03)
We report a procedure to grow thermo-responsive polymer shells at the surface of magnetic nanocarriers made of multiple iron oxide superparamagnetic nanoparticles embedded in poly(maleic anhydride-alt-1-ocatadecene) polymer nanobeads. Depending on the comonomers and on their relative composition, tunable phase transition
Albert J de Graaf et al.
Journal of controlled release : official journal of the Controlled Release Society, 162(3), 582-590 (2012-09-14)
In this paper it is shown that when a thermosensitive hydrogel based on poly(N-isopropylacrylamide)-poly(ethylene glycol)-poly(N-isopropylacrylamide) (pNIPAm-PEG-pNIPAm) was transferred into water, flower-like micelles were continuously released as long as the medium was regularly refreshed. On the other hand, if the medium
Jinseok Byun et al.
Chemical communications (Cambridge, England), 48(74), 9278-9280 (2012-08-09)
We report a novel approach for the fabrication of a photo-responsive surface with fast and reversibly switchable wettability between hydrophobicity and hydrophilicity induced by a photothermal effect.
Kornelia Gawlitza et al.
Physical chemistry chemical physics : PCCP, 14(27), 9594-9600 (2012-06-12)
The aim of the present work is the use of a water soluble enzyme in an organic solvent, still with a pronounced catalytic activity. Therefore, lipase B from Candida antarctica (CalB) is immobilized within micron-sized thermosensitive p-NIPAM hydrogel particles using
Pengju Pan et al.
Langmuir : the ACS journal of surfaces and colloids, 28(40), 14347-14356 (2012-09-28)
Linear and miktoarm star-shaped diblock copolymers consisting of single-stranded DNA and poly(N-isopropylacrylamide) (PNIPAAm) with various compositions were synthesized via atom transfer radical polymerization and click chemistry. The temperature-responsive phase transition behavior, micellization, was systematically examined using UV-vis spectrometry, high-sensitivity differential

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