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首页> 外文期刊>Journal of Applied Polymer Science >Compatibilization method applied to the chitosan-acid poly(L-lactide) solution
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Compatibilization method applied to the chitosan-acid poly(L-lactide) solution

机译：用于壳聚糖-酸聚（L-丙交酯）溶液的相容化方法

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We are testing the compatibilization of the chitosan/PLA blends by addition of diisocyanate and at studying the effect of several MDI concentrations (0.5 and 2.5% of the global blend mass, w/w). To evaluate the MDI efficiency as a compatibilizer of chitosan/PLA blends, we worked with the following methods: IRTF spectra with higher peak at 1558 cm~(-1) is due to the ANH bonds that exist in urea and urethane, thermal properties shows that the temperature of the endothermic peaks of the chitosan/PLA blends with MDI is very close to the temperature of pure chitosane and SEM micrography shows that MDI addition decreases the PLA particles size in the chitosan mixture; they also comply with the compatibilization theory. After that the mechanical properties have been characterized: we can notice that the MDI compatibilized chitosan/PLA blends have a higher Young's modulus than the noncompatibilized blends. we are showed that the use of 0.5% MDI is not enough sufficient to obtain a compatibilization, because a part of the MDI can be consumed by water. The addition of MDI increases the performance of the mechanical properties of the blends. Therefore, with this compatibilization, we could obtain some chitosan/PLA blends that would be water-resistant and that would also keep their mechanical properties.
机译：我们正在通过添加二异氰酸酯测试壳聚糖/ PLA共混物的相容性，并研究几种MDI浓度（占全球共混物质量的0.5和2.5％，w / w）的影响。为了评估作为壳聚糖/ PLA共混物的增容剂的MDI效率，我们使用以下方法进行了研究：IRTF谱图在1558 cm〜（-1）处具有较高的峰是由于尿素和尿烷中存在ANH键，热性能表明壳聚糖/ PLA与MDI共混物的吸热峰温度非常接近纯壳聚糖的温度，并且SEM显微照片显示，添加MDI可以降低壳聚糖混合物中PLA的粒径;它们还符合相容性理论。之后，对机械性能进行了表征：我们可以注意到MDI相容的壳聚糖/ PLA共混物比不相容的共混物具有更高的杨氏模量。我们发现，使用0.5％的MDI不足以实现增容，因为一部分MDI可以被水消耗。 MDI的添加提高了共混物的机械性能。因此，通过这种相容性，我们可以获得一些壳聚糖/ PLA共混物，这些共混物既防水又能保持其机械性能。

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