523925

Poly(acrylic acid) solution

average M_w ~100,000, 35 wt. % in H₂O

• Synonym(s): PAA
• Linear Formula: (C₃H₄O₂)_n
• CAS Number: 9003-01-4
• MDL number: MFCD00084394
• UNSPSC Code: 12162002
• PubChem Substance ID: 24874380
• NACRES: NA.23

Properties

• mol wt: average M_w ~100,000
• concentration: 35 wt. % in H₂O
• density: 1.14 g/mL at 25 °C
• SMILES string: OC(=O)C=C
• InChI: 1S/C3H4O2.Na/c1-2-3(4)5;/h2H,1H2,(H,4,5);/q;+1/p-1
• InChI key: NNMHYFLPFNGQFZ-UHFFFAOYSA-M

Description

General description

Poly (acrylic acid) (PAA) is hygroscopic, brittle and colorless in nature with Tg at nearly 106^oC. At temperatures above 200, up to 250^oC, it loses water and becomes an insoluble crosslinked polymer anhydride. Solubility of dried PAA in water increases with rise in temperature. Concentrated solutions of PAA in water are thixotropic in nature.

Application

PAA is used in the preparation of nano-hydroxyapatite polyacrylic acid (Hap/PAAc) biocomposites.†Other probable applications of PAA are: to study solute diffusion in Polyvinyl alcohol/PAA copolymer hydrogels†, synthesizing poly(N-isopropylacrylamide)-block-PAA copolymer which responds to both temperature and pH stimuli†, in preparing block copolymer of oligo (methyl methacrylate)/PAA for micellar delivery of hydrophobic drugs†, and as a thickening agent for adhesives.

Safety Information

• Pictograms: GHS05,GHS07,GHS09
• Signal Word: Danger
• Hazard Statements: H318,H335,H410
• Precautionary Statements: P261 - P271 - P273 - P280 - P304 + P340 + P312 - P305 + P351 + P338
• Hazard Classifications: Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 1
• Flash Point(F): 212.0 °F - closed cup
• Flash Point(C): 100 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves