聚（丙烯酸）（PAA）在自然状态下具有吸湿性、脆性和且无色，Tg接近106oC。在高于200至250oC的温度下，它会失水并变成不溶的交联聚合物酸酐。干燥的PAA在水中的溶解度会随着温度的升高而提高。PAA在水中的浓缩液在自然状态下是具有触变性的。 Poly (acrylic acid) (PAA) is hygroscopic, brittle and colorless in nature with Tg at nearly 106oC. At temperatures above 200 to 250oC, it loses water and becomes an insoluble crosslinked polymer anhydride. Solubility of dried PAA in water increases with rise in temperatures. Concentrated solutions of PAA in water is thixotropic in nature. Application Applications of PAA may include: to study solute diffusion in Polyvinyl alcohol/PAA copolymer hydrogel. 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. as thickening agent for adhesives.