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Effect of block copolymer containing ionic liquid moiety on interfacial polarization in PLA/PCL blends

机译:嵌段共聚物含有离子液体部分对PLA / PCL共混物界面极化的影响

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摘要

Compared with poly(-caprolactone)-b-poly(ethylene glycol) block copolymer (BC), a systematic study of the effect of the concentration of the compatibilizer, poly(-caprolactone)-b-poly(ethylene glycol) BC containing ionic liquid moiety (BCIL), on the interfacial properties of a phase separating blend of poly(l-lactic acid)/poly(-caprolactone) (PLA/PCL) was performed. BCIL copolymer as a compatibilizer for immiscible PLA/PCL blend can reinforce the interactions between the two polymeric phases by the IL electrostatic interaction at interphase, and the particle size of PCL decreases because of interfacial reinforced-compatibilization of IL moiety. Ion mobility of IL moiety at interphase and PCL phase for PLA/PCL/BCIL blend can induce interfacial blocking of charge carriers, and IL moiety segregating mainly at the interface can decrease the relaxation rate and increase the dielectric strength of interfacial polarization. Our results provide a methodology to characterize and tune the morphology and blocking of charge carriers with the aim of tailoring the dielectric interfacial properties of blends. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46161.
机译:与聚( - 加甲酰胺)-B-聚(乙二醇)嵌段共聚物(BC)相比,对含有离子的浓度,聚( - 己内酯)-B-聚(乙二醇)BC的浓度的系统研究对聚(L-乳酸)/聚( - 己内酯)(PLA / PCL)的相分离混合物的界面性能进行液体部分(BCIL)。作为不混溶的PLA / PCL共混物的BcIl共聚物作为不混溶的PLA / PCL共混物可以通过Interphase的IL静电相互作用来增强两个聚合物相之间的相互作用,并且由于IL部分的界面增强 - 增强型,PCL的粒度降低。 IL部分以PLA / PCL / BCIL混合物的相互作用和PCL相的离子迁移率可以诱导电荷载体的界面阻断,并且IL部分主要在界面处偏析可以降低弛豫速率并增加界面极化的介电强度。我们的结果提供了一种方法来表征和调整电荷载体的形态和阻塞,其目的是剪裁混合物的介电界面性质。 (c)2018 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2018,135,46161。

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