Modular and Processable Fluoropolymers Prepared via a Safe, Mild, Iodo-Ene Polymerization.

Area of Science:

• Polymer Chemistry
• Materials Science

Background:

• Traditional fluoropolymers face limitations in processability and functionalization.
• Explosive monomers hinder academic research on perfluorocarbons.

Purpose of the Study:

• To introduce semifluorinated iodo-ene polymers as a solution to fluoropolymer limitations.
• To enable advanced material science applications using perfluorocarbon properties.

Main Methods:

• Sodium dithionate initiated polymerization of perfluorodiiodides and dienes.
• Synthesis of high-molecular-weight polymers with high fluorine content (>59 wt %).
• Demonstration of mild polymerization conditions compatible with functional dienes.

Main Results:

• Achieved high-molecular-weight polymers (>100 kDa) with up to 59 wt % fluorine content.
• Developed biodegradable fluoropolymers through polymerization of functional dienes.
• Incorporated iodine atoms for improved processability, removable for enhanced stability.
• Facilitated surface modification and cross-linking via iodine displacement with thiols or azides.
• Enabled allyl group addition and photo-cross-linking due to the C-I bond's low dissociation energy.

Conclusions:

• Semifluorinated iodo-ene polymers provide a versatile scaffold overcoming traditional fluoropolymer limitations.
• Simple synthesis and modular nature allow for the convergence of perfluorocarbons with advanced materials.
• These polymers open new avenues for functional and biodegradable fluorinated materials.