Facile synthesis of thermo-, pH-, CO2- and oxidation-responsive poly(amido thioether)s with tunable LCST and UCST behaviors

作者：Zhang, Hongcan; Zhang, Jian; Dai, Wenxue; Zhao, Youliang^*

来源：Polymer Chemistry, 2017, 8(37): 5749-5760.

DOI：10.1039/c7py01351e

• CRITICAL SOLUTION TEMPERATURE
• ONE-POT SYNTHESIS
• BLOCK-COPOLYMER
• THERMORESPONSIVE BEHAVIORS
• THIOLACTONE CHEMISTRY
• POLYMERS
• HOMOPOLYMERS
• RAFT
• POLYMERIZATION
• NANOPARTICLES

The simple and straightforward construction of multi-responsive systems with tunable LCST and UCST dual phase transitions is a great challenge. This study affords an efficient route to tune cloud points via control over the chemical composition of hydroxyl and diethylamino bearing poly(amido thioether)s which were prepared by one-pot thiol-amine-acrylate polyaddition. Owing to the balance of inter/intra-chain interactions, various copolymers could exhibit LCST (f(OH) < 0.84), LCST-UCST (f(OH) = 0.84-0.89) and UCST (f(OH) > 0.89) behaviors relying on the hydroxyl fraction in comonomer units. Meanwhile, the thermoresponsive behaviors of copolymer solutions could be efficiently tuned via switching the solvent and solution pH, applying CO2/N-2 bubbling, and oxidation. The success of this study further paves the way for the robust synthesis and practical applications of smart polymers with double thermoresponsivity.

• 出版日期2017-10-7
• 单位苏州大学