The addition of ethyl ester l-lysine tri-isocyanate (LTI) to mixtures of poly(lactide)/poly(ε-caprolactone) has been reported to improve the compatibility of the resulting blends. In the present work, we have investigated the influence of adding increasing amounts of LTI to the mechanical and thermal properties of the blends. Torque trends, plate-plate rheology, differential scanning calorimetry, scanning electron microscopy, and uniaxial tensile characterization were conducted on samples with amounts of LTI comprised between 0.5 and 5 phr. Results suggest that by increasing the content of LTI over 0.5 phr the mechanical and thermal behaviour of the blends tend to change from that of a thermoplastic to that of a cross-linked, rubber-like material with outstanding mechanical properties. Morphological investigations show a very fine, well-dispersed morphology in all cases. Numerical models have been applied to rheological experiments to identify processes and phases in the studied blends, further supporting the hypothesis of a cross-linked phase formed for blends containing more than 0.5 phr of LTI.

乙酯l的加成据报道，将赖氨酸三异氰酸酯（LTI）与聚（丙交酯）/聚（ε-己内酯）的混合物改善了所得混合物的相容性。在目前的工作中，我们研究了添加越来越多的LTI对共混物的机械和热性能的影响。对LTI含量在0.5至5 phr之间的样品进行了扭矩趋势，板-板流变学，差示扫描量热法，扫描电子显微镜和单轴拉伸表征。结果表明，通过增加LTI的含量超过0.5 phr，共混物的机械和热性能趋于从热塑性塑料变为具有出色机械性能的交联橡胶状材料。形态学研究表明，在所有情况下形态都非常精细，分布良好。