Poly(acrylic acid) is a water-soluble synthetic polymer characterized by carboxylic acid functional groups along its backbone, making it highly responsive to pH changes and capable of forming ionic interactions. It is widely used in superabsorbent materials, adhesives, coatings, and pharmaceutical formulations, where its ability to absorb and retain liquids and its biocompatibility are valuable. Engineers select this polymer for applications requiring hydrogel properties, controlled drug delivery, or reversible cross-linking, though its performance is heavily dependent on degree of hydration and pH environment.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Strength(σc) | 4.339 | ksi | — | ||
Elongation at Break(εf) | 896.4 | - | — | ||
Ultimate Tensile Strength(σUTS) | 0.2679 | ksi | — | ||
Young's Modulus(E) | 14.82 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 219 | °F | — | ||
Melting Point / Solidus(Tm) | 459 | °F | — | ||
Maximum Service Temperature(Tmax) | 593.6 | °F | — | ||
Thermal Conductivity(k) | 0.2600 | BTU/(hr·ft·°F) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.509 | - | — |