Telechelic Poly(disulfide)s and Related Block Copolymer

Area of Science:

• Polymer Chemistry
• Materials Science

Background:

• Poly(disulfide)s are versatile polymers with potential applications in drug delivery and materials science.
• Developing efficient and controlled synthesis methods for functional poly(disulfide)s is crucial for their broader utilization.

Purpose of the Study:

• To establish a mild, efficient, and generalizable polycondensation route for synthesizing poly(disulfide)s.
• To create telechelic poly(disulfide)s with predictable molecular weights and reactive end groups.
• To demonstrate the functionalization of these polymers for advanced copolymer synthesis.

Main Methods:

• Polycondensation of 2,2'-dithiodipyridine and 1,6-hexanedithiol using stoichiometric imbalance.
• Thiol-disulfide exchange reactions for end-group functionalization.
• Ring-opening polymerization of lactide initiated by functional telechelic poly(disulfide)s.

Main Results:

• A novel polycondensation method yielded poly(disulfide)s with controlled molecular weights.
• Telechelic poly(disulfide)s with reactive pyridyl disulfide end groups were successfully synthesized.
• Functional telechelic poly(disulfide)s were prepared and used as macroinitiators for creating ABA-type triblock copolymers.

Conclusions:

• The developed polycondensation route offers a mild and efficient method for producing functional poly(disulfide)s.
• The ability to create functional telechelic poly(disulfide)s enables the synthesis of complex polymer architectures, such as degradable triblock copolymers.
• This work provides a versatile platform for designing advanced polymeric materials with tunable properties.