Biodegradable microfibrillar composites PCL/PLA/C15, where PCL is poly(ε-caprolactone), PLA is poly(lactic acid), and C15 is organophilic montmorillonite, have been prepared. Microindentation hardness testing was employed in monitoring the gradual improvement of PCL stiffness due to PLA addition, C15 addition, flow-induced orientation, and changing crystallinity throughout the whole preparation process. Neat PCL after extrusion and injection molding was quite soft, but the stiffness of the material increased after melt-blending with 20 wt.% of PLA, after the addition of 2 wt.% of C15, and after the preparation of the final microfibrillar composite. The indentation modulus and indentation hardness of all intermediate products and the final PCL/PLA/C15 microfibrillar composite were associated not only with the composition and morphology but also with the crystallinity of both components. The modulus of the final PCL/PLA/C15 composite was almost two times higher in comparison with the original PCL matrix.

制备了可生物降解的微原纤复合材料PCL / PLA / C15，其中PCL为聚（ε-己内酯），PLA为聚乳酸，C15为亲有机蒙脱土。微压痕硬度测试被用于监测由于PLA的添加，C15的添加，流动诱导的取向以及整个制备过程中结晶度的变化而引起的PCL硬度的逐渐提高。挤出和注塑成型后的整洁PCL非常柔软，但是在与20 wt。％的PLA熔融共混后，添加2 wt。％的C15之后以及制备最终的微原纤复合材料后，材料的刚度提高了。所有中间产品和最终的PCL / PLA / C15微原纤复合材料的压痕模量和压痕硬度不仅与组成和形态有关，而且与两种组分的结晶度有关。与原始PCL基质相比，最终PCL / PLA / C15复合材料的模量几乎高出两倍。