A well-defined biodegradable 1,2,3-triazolium-functionalized PEG-b-PCL block copolymer: facile synthesis and its compatibilization for PLA/PCL blends

作者：Wang, Ping; Zhang, Di; Zhou, Yiyang; Li, Yu; Fang, Huagao; Wei, Haibing^*; Ding, Yunsheng^*

来源：Ionics, 2018, 24(3): 787-795.

DOI：10.1007/s11581-017-2234-3

• 1,2,3-Triazolium
• Ion-containing compatibilizer
• Click chemistry
• Crystallization
• PLA/PCL blends

A novel biodegradable 1,2,3-triazolium-functionalized PEG-b-PCL copolymer (TAPEC) was synthesized by the "click" coupling of methoxypolyethylene glycol azide and alpha-propargyl-omega-hydroxyl-poly(epsilon-caprolactone), followed by the quaternization of the 1,2,3-triazole moiety with iodomethane. All the intermediates and TAPEC were characterized by H-1 NMR, FT-IR, and gel permeation chromatography (GPC). Taking advantage of the characteristics of ionic liquid and block copolymer, this ion-containing diblock copolymer is expected to be used as a novel compatibilizer in mixed biopolyester for regulating the interface and crystallization behaviors. Hence, the TAPEC was evaluated as a compatibilizer and an interface emulsifier in the blends of polylactic acid (PLA) and poly(epsilon-caprolactone) (PCL). Non-isothermal crystallization experimental results showed that the TAPEC with the higher amount of epsilon-caprolactone units induces a plasticization and nucleate effect that increased the crystallization ability of the PLA phase; meanwhile, in the PCL phase, the agminated ionic cluster acting as a nucleating agent significantly increased the crystalline of PCL.

• 出版日期2018-3
• 单位合肥工业大学