The remarkable structural features of organic modified montmorillonite particles (OMMT) enable them to complete their important role in enhancing different properties of polyurethane copolymer with 75 wt.% hard segments (PUC/75). Based on the melt intercalation approach, various amounts of OMMT were incorporated into PUC/75 solution followed by the injection moulding process. It is essential to mention that the synthesized PUC/75 in this work relied on using 1,5-Pentanediol as a chain extender in order to produce a long-term and thermal-stable PUC successfully. The effect of incorporating various loading of OMMT on rheological properties of neat PUC/75 and its nanocomposites was investigated. The structure of PUC/OMMT was studied using X-ray diffraction (XRD) and scanning electron microscopy. Additionally, differential scanning calorimetry (DSC) thermograms were utilized to investigate OMMT effect on the thermal transitions and crystallinity of resultant PUC nanocomposites. Interestingly, the dynamic rheological analysis exhibited a remarkable increase in melt rheology behaviour with increasing OMMT loading compared to neat PUC/75. This could imply a good interaction between the functional group on the surface of OMMT and PUC/75 domains; particularly hard domains, herein the DSC results showed moderate improvement in melt temperature (T_m) of PUC/OMMT nanocomposite. However, a decline in crystalline temperature (T_c) was also seen due to aggregation of OMMT, especially at higher OMMT loading. While XRD results exhibited a slight shifting in crystalline peaks of PUC nanocomposites relative to neat PUC/75.

有机改性蒙脱土颗粒（OMMT）的显着结构特征使其能够完成其在增强具有75 wt。％硬链段（PUC / 75）的聚氨酯共聚物的不同性能方面的重要作用。基于熔融插层方法，将各种量的OMMT掺入PUC / 75溶液中，然后进行注塑工艺。必须提及的是，这项工作中合成的PUC / 75依赖于使用1,5-戊二醇作为扩链剂，以便成功生产出长期稳定且热稳定的PUC。研究了掺入各种负载量的OMMT对纯PUC / 75及其纳米复合材料流变性能的影响。使用X射线衍射（XRD）和扫描电子显微镜研究了PUC / OMMT的结构。此外，差示扫描量热法（DSC）热分析图用于研究OMMT对所得PUC纳米复合材料的热转变和结晶度的影响。有趣的是，与纯PUC / 75相比，动态流变分析显示随着OMMT载荷的增加，熔体流变行为显着增加。这可能意味着OMMT表面的官能团与PUC / 75结构域之间存在良好的相互作用。特别是硬质区域，此处的DSC结果显示熔体温度（T 这可能意味着OMMT表面的官能团与PUC / 75结构域之间存在良好的相互作用。特别是硬质区域，此处的DSC结果显示熔体温度（T 这可能意味着OMMT表面的官能团与PUC / 75结构域之间存在良好的相互作用。特别是硬质区域，此处的DSC结果显示熔体温度（T_m）PUC / OMMT纳米复合材料。但是，由于OMMT的聚集，尤其是在较高的OMMT负载下，也观察到了晶体温度（T _c）的下降。XRD结果显示，相对于纯净的PUC / 75，PUC纳米复合材料的结晶峰略有偏移。