This study provides a new approach to promote the mechanical properties of polyvinylchloride/dioctyl phthalate (PVC/DOP) via gelators. It presented the effect of newly synthesized urethane and urea‐based gelators on the plasticizer DOP, and then prepared for PVC. 4,4′‐Diphenylmethane diisocyanate (MDI) was reacted with lauryl alcohol (LA), stearyl alcohol (SA), and octadecylamine (OL) to prepare LML, SMS, and SMO, respectively. These gelators were self‐assembled in the common plasticizer DOP to form gels, and then PVC was blended with these gels. SMO exhibited the lowest critical gelator concentration (CGC) in DOP. FEEM observation of xerogels exhibited micro platelet morphology with various sizes. Rheological evaluation revealed that DOP_gel enhanced the gelating ability of PVC. Mechanical measurement showed that gelators improved the tensile properties of PVC in the sequence of LML > SMS > SMO. Tensile modulus and the tensile strength of PVC/DOP increased by 74.6% (from 14.6 to 25.5 MPa) and 19.8% (from 13.1 to 15.7 MPa) only by adding 3% LML. These new urethane and urea‐based gelators improved the mechanical strength of PVC without reducing its toughness.

中文翻译：

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使用氨基甲酸酯和脲基胶凝剂增强邻苯二甲酸二辛酯的胶凝性能，以改善聚氯乙烯的机械性能

这项研究提供了一种通过胶凝剂提高聚氯乙烯/邻苯二甲酸二辛酯（PVC / DOP）的机械性能的新方法。它介绍了新合成的氨基甲酸酯和脲基胶凝剂对增塑剂DOP的影响，然后将其用于PVC。使4,4'-二苯甲烷二异氰酸酯（MDI）与月桂醇（LA），硬脂醇（SA）和十八烷基胺（OL）反应，分别制备LML，SMS和SMO。这些胶凝剂在常见的增塑剂DOP中自组装形成凝胶，然后将PVC与这些胶凝混合。SMO在DOP中表现出最低的临界胶凝剂浓度（CGC）。FEEM观察到的干凝胶表现出不同大小的微血小板形态。流变学评估表明DOP_凝胶增强了PVC的胶凝能力。力学测量表明，胶凝剂按LML> SMS> SMO的顺序改善了PVC的拉伸性能。仅添加3％LML ，PVC / DOP的拉伸模量和抗张强度就分别提高了74.6％（从14.6到25.5 MPa）和19.8％（从13.1到15.7 MPa）。这些新型的氨基甲酸酯和脲基胶凝剂在不降低其韧性的情况下提高了PVC的机械强度。