Synthesis and thermomechanical characteristics of zwitterionic poly(arylene ether sulfone) copolymers
Synthesis and thermomechanical characteristics of zwitterionic poly(arylene ether sulfone) copolymers
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DOI：
10.1016/j.polymer.2022.125522
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发表时间：
2022-11
期刊：
影响因子：
4.6
通讯作者：
Yi Yang;Hoda Shokrollahzadeh Behbahani;B. Morgan;F. Beyer;Alexis Hocken;M. Green
中科院分区：
文献类型：
--
作者：
Yi Yang;Hoda Shokrollahzadeh Behbahani;B. Morgan;F. Beyer;Alexis Hocken;M. Green
含电荷聚合物材料已被广泛研究用于一系列应用。含电荷聚合物的电荷种类、电荷密度和微观形态之间的基本关系对于定义它们的应用至关重要。在这项工作中，制备了一系列具有可控磺基甜菜碱电荷含量（0-100 mol%）和高分子量（Mw ~ 65 kDa）的热塑性聚（亚芳基醚砜）（PAES）共聚物。合成的所有两性离子 PAES 均表现出高达 250 °C 的热稳定性。 DSC 和拉伸测试显示，随着电荷密度的增加，Tg 和机械强度降低，这表明带电基团的塑化效应。电子显微镜和X射线散射数据证实了含离子无规共聚物体系中不存在微相分离，这证实了所研究的所有两性离子共聚物的单一Tg的观察结果。此外，通过吸水率测量评估了样品的相对亲水性，结果表明，对于 72 mol% 两性离子共聚物，两性离子 PAES 的吸水率最高可达 64%，而湿态下的自支撑膜仍保持 185 MPa 的杨氏模量。这项工作中的热塑性含电荷共聚物表现出在涂料或水净化膜等应用中的潜力，其中平衡亲水性、可加工性和热机械性能非常重要。
Charge-containing polymeric materials have been widely studied for a range of applications. The fundamental relationships between the charge species, charge density, and the microscale morphology of charge-containing polymers are critical for defining the application in which they may be used. In this work, a series of thermoplastic poly(arylene ether sulfone) (PAES) copolymers with controllable sulfobetaine charge contents (0–100 mol%) and high molecular weights (Mw ∼ 65 kDa) were prepared. All the zwitterionic PAESs synthesized showed thermal stability up to 250 °C. DSC and tensile tests showed a decreased Tgand mechanical strength with the incorporation of increasing charge density, which suggests a plasticization effect by the charged group. Electron microscopy and X-ray scattering data confirmed the absence of microphase separation in the ion-containing random copolymer system, which corroborated with the observation of a single Tgfor all zwitterionic copolymers studied. Furthermore, the relative hydrophilicity of the samples was evaluated by water uptake measurements, which revealed that the water uptake of the zwitterionic PAESs can reach up to 64% for the 72 mol% zwitterion copolymer while the free-standing film in the wet state still maintains a Young's modulus of 185 MPa. The thermoplastic charge-containing copolymers in this work demonstrated potential for applications such as coatings or water purification membranes, in which balancing hydrophilicity, processibility, and thermomechanical performance are important.