How does epoxidation of poly(1,3-pentadiene) expand its application range?

How does epoxidation of poly(1,3-pentadiene) expand its application range?
Recent research from Hunan Institute of Science and Technology demonstrates that poly(1,3-pentadiene) (PPD) can be precisely synthesized via living anionic polymerization using solvent control—cyclohexane and cyclopentyl methyl ether (CPME) enable microstructure tuning. Subsequent epoxidation in CPME is far more efficient than in THF, and adding ammonia water fully suppresses epoxy ring-opening side reactions. By controlling temperature, 1,4-structure double bonds can be selectively epoxidized. This allows glass transition temperature (Tg) to be tuned from -51.3°C to +67.4°C, a much wider range than epoxidized natural rubber (ENR), whose maximum Tg is only -10°C. This opens applications in adhesives and elastomers where tailored polarity and thermal properties are required, potentially displacing ENR in high-performance formulations.