also known as PEOX or PETOX, is a synthetic polymer that belongs to the class of poly(N-acyl ethylenimine)s or pseudo-polypeptides. It is a water-soluble and biocompatible polymer with potential applications in various fields, including biomedicine, pharmaceuticals, and materials science.

Poly(2-ethyl-2-oxazoline), also known as PEOX or PETOX, is a synthetic polymer that belongs to the class of poly(N-acyl ethylenimine)s or pseudo-polypeptides. It is a water-soluble and biocompatible polymer with potential applications in various fields, including biomedicine, pharmaceuticals, and materials science.

Key properties and applications of poly(2-ethyl-2-oxazoline):

1. Water solubility: PEOX is a hydrophilic polymer that is soluble in water and other polar solvents, making it suitable for biomedical applications such as drug delivery, tissue engineering, and bioconjugation.

2. Biocompatibility: PEOX exhibits low toxicity and good biocompatibility, which makes it attractive for biomedical applications, including drug carriers, biomaterials, and therapeutic agents.

3. Thermal and chemical stability: PEOX is relatively stable under various thermal and chemical conditions, allowing for its use in various processing techniques and formulations.

4. Protein resistance: PEOX has been reported to possess protein-resistant properties, which can be beneficial in preventing non-specific protein adsorption on surfaces, such as in biosensors and medical devices.

5. Drug delivery: PEOX has been explored as a polymer carrier for drug delivery systems, including micelles, nanoparticles, and hydrogels, due to its biocompatibility and ability to solubilize hydrophobic drugs.

6. Surface modification: PEOX can be grafted or coated onto various surfaces to impart desired properties, such as biocompatibility, lubricity, or protein resistance.

The properties of PEOX can be further tailored by varying its molecular weight, end-group functionalization, or copolymerization with other monomers. This versatility makes poly(2-ethyl-2-oxazoline) a valuable polymer for a range of applications in the biomedical, pharmaceutical, and materials science fields.