Abstract Sulfonic acidic ionic liquids (ILs) based on imidazolium or triphenylphosphonium cations were synthesized and used as new transesterification agents to compatibilize partially bio-based thermoplastic blends composed of polylactide (PLA) and ethylene-co-vinyl acetate (EVA) copolymer containing 18% of VA. The influence of these Bronsted acidic ionic liquids (BAIL) as catalysts was investigated and compared with conventional catalyst such as titanium tetrabutoxide (Ti(BuO) 4 ). In all cases, the presence of the sulfonic acidic ionic liquids resulted in an increase of the torque during the processing of the polymer blends, suggesting the transesterification reaction, which was confirmed by Fourier transform infrared spectroscopy (FTIR). Moreover, the degradation of PLA chain was minimized by the presence of ILs, whereas Ti(BuO) 4 promoted a decrease of molar mass of the PLA component and a decrease of the torque. Thus, the influence of the transesterification on the final properties such as the thermal degradation as well as the thermomechanical and mechanical properties has been studied. The highest efficiency of the blend compatibilization was achieved by using only 1 wt% of IL denoted triphenylphosphonium butyl sulfonic acid chloride [TPP-bSO 3 H.Cl]. Indeed, the SEM micrograph of this blend was more uniform with EVA particles well adhered to the PLA matrix.

中文翻译：

---

布朗斯台德酸性离子液体：用于聚丙交酯/乙烯-共-醋酸乙烯酯共混物增容的新型酯交换剂

摘要 合成了基于咪唑鎓或三苯基鏻阳离子的磺酸酸性离子液体 (ILs) 并将其用作新的酯交换剂，以增容由聚丙交酯 (PLA) 和乙烯-共-醋酸乙烯酯 (EVA) 共聚物组成的部分生物基热塑性共混物，其中含有 18%弗吉尼亚州。研究了这些布朗斯台德酸性离子液体 (BAIL) 作为催化剂的影响，并与常规催化剂如四丁氧基钛 (Ti(BuO) 4 ) 进行了比较。在所有情况下，磺酸离子液体的存在导致聚合物共混物加工过程中扭矩的增加，表明发生了酯交换反应，傅里叶变换红外光谱 (FTIR) 证实了这一点。此外，由于 ILs 的存在，PLA 链的降解被最小化，而Ti(BuO) 4 促进了PLA组分的摩尔质量的降低和扭矩的降低。因此，已经研究了酯交换对最终性能的影响，例如热降解以及热机械和机械性能。仅使用 1 wt% 的 IL 表示的三苯基鏻丁基磺酰氯 [TPP-bSO 3 H.Cl] 实现了共混增容的最高效率。事实上，这种混合物的 SEM 显微照片更均匀，EVA 颗粒很好地粘附在 PLA 基质上。通过仅使用 1 重量％的 IL 表示的三苯基鏻丁基磺酰氯 [TPP-bSO 3 H.Cl] 实现了共混增容的最高效率。事实上，这种混合物的 SEM 显微照片更均匀，EVA 颗粒很好地粘附在 PLA 基质上。仅使用 1 wt% 的 IL 表示的三苯基鏻丁基磺酰氯 [TPP-bSO 3 H.Cl] 实现了共混增容的最高效率。事实上，这种混合物的 SEM 显微照片更均匀，EVA 颗粒很好地粘附在 PLA 基质上。