Hydrophilic Polyethers Derived from Functional Epoxides: Beyond Poly(ethylene glycol).

Area of Science:

• Polymer Science and Technology
• Materials Science

Background:

• Poly(ethylene glycol) (PEG) is a widely used hydrophilic polymer with diverse applications.
• Limitations of PEG include monomer hazards, poor crystallinity, limited modification sites, lack of stimuli-responsiveness, and immunogenicity.
• These limitations necessitate the exploration of alternative hydrophilic polymers.

Purpose of the Study:

• To review synthetic methods, properties, and applications of non-PEG hydrophilic polyethers.
• To highlight polymers derived from functional epoxide monomers with polar pendant groups.
• To discuss the advantages of these alternatives over traditional PEG.

Main Methods:

• Literature review of synthetic strategies for non-PEG hydrophilic polyethers.
• Analysis of properties including water solubility, biocompatibility, stimuli-responsiveness, and modifiability.
• Compilation of current and potential applications.

Main Results:

• Non-PEG hydrophilic polyethers maintain PEG's desirable characteristics like water solubility and biocompatibility.
• These alternative polymers exhibit tunable stimuli-responsiveness (temperature, pH, oxidation) and chemical modifiability.
• Some non-PEG polyethers also offer degradability, a feature lacking in PEG.

Conclusions:

• Non-PEG hydrophilic polyethers present a promising alternative to PEG, overcoming its limitations.
• These polymers offer enhanced functionalities such as stimuli-responsiveness and chemical modifiability.
• Future research should focus on addressing current challenges and exploring new opportunities for these advanced materials.