Abstract The first example of the usefulness of titanium (IV) butoxide, as initiators for open air in-situ intercalative polymerization of ε-caprolactone (ε-CL) in the presence of organoclay is herein reported. The bionanocomposites based on poly(ε-caprolactone) (PCL) were prepared by in-situ Ring Opening Polymerization (ROP) of ε-caprolactone in the presence of different organomodified montmorillonite clay (ODA-MMT) loading (1, 3 and wt%). Structural, thermal and mechanical characterizations of the resulting bionanocomposites were investigated. The presence of the nanoclay increased PCL crystallinity, melting temperature and thermal stability, whereas some decrease in Tg was observed. TEM analyses confirmed the good dispersion of ODA-MMT with 1 and 3 wt% content into the PCL polymer as already asserted by XRD diffraction. Finally, the Young's modulus of the PCL nanocomposites was higher compared to the neat PCL, while a decrease of stress and strain at break for materials with different filler content was observed. Graphical Abstract

中文翻译：

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原位聚合在露天制备的聚（ε-己内酯）/有机改性粘土生物纳米复合材料的结构、热和机械性能

摘要本文报道了丁醇钛 (IV) 作为引发剂在有机粘土存在下进行 ε-己内酯 (ε-CL) 的露天原位插层聚合反应的有用性的第一个例子。基于聚（ε-己内酯）（PCL）的生物纳米复合材料是通过ε-己内酯在不同有机改性蒙脱土（ODA-MMT）负载（1、3和wt％）存在下的原位开环聚合（ROP）制备的）。研究了所得生物纳米复合材料的结构、热和机械特性。纳米粘土的存在增加了 PCL 的结晶度、熔化温度和热稳定性，而观察到的 Tg 有所降低。TEM 分析证实了 1 和 3 重量％的 ODA-MMT 在 PCL 聚合物中的良好分散，正如 XRD 衍射所断言的那样。最后，年轻的' 与纯 PCL 相比，PCL 纳米复合材料的 s 模量更高，同时观察到具有不同填料含量的材料的断裂应力和应变降低。图形概要