This study shows an approach of compatibilization between ethylene‐propylene diene monomer (EPDM) and Chloroprene Rubber (CR) by using nanosilica (SiO₂) as a compatibilizer and, at the same time, as a strong reinforcing nanofiller. The effect of nanosilica and rubber composition was studied on microstructure and mechanical properties of the cured EPDM/CR/SiO₂. The microstructure of compounds were characterized using scanning electron microscopy and transmission electron microscopy, which demonstrated that the observed nanoSiO₂ were in both EPDM and CR phases. It was found that the addition of nanosilica had massive improvement on modulus, tensile strength, and dynamic mechanical thermal analysis of the samples. With the incorporation of just 10 phr nano‐SiO₂, the storage modulus above the glass transition region of CR50 increased from about 3.9 to 7.16 MPa. Moreover, the investigation of glass transition temperature (T_g) values showed that the compatibility of EPDM and CR in the compound enhanced with the addition of nanosilica, which in turn contributes to improving the properties of compounds. In addition, the results of mechanical properties of the samples revealed that the tensile strength, elongation at break and modulus of CR50 after modifying with 10 phr of nanosilica increased by around 398%, 33%, and 135%, respectively.

中文翻译：

---

纳米二氧化硅对乙烯-丙烯二烯单体/氯丁橡胶共混物的增容效果和增强效率

这项研究表明，通过使用纳米二氧化硅（SiO ₂）作为增容剂，同时用作强增强纳米填料，可以使乙烯-丙烯二烯单体（EPDM）与氯丁橡胶（CR）增容。研究了纳米二氧化硅和橡胶组成对固化EPDM / CR / SiO ₂微观结构和力学性能的影响。用扫描电子显微镜和透射电子显微镜对化合物的微观结构进行了表征，结果表明所观察到的纳米SiO ₂处于EPDM和CR相。发现添加纳米二氧化硅在样品的模量，拉伸强度和动态机械热分析方面有很大的改进。仅掺入10 phr纳米SiO_{如图2所示}，CR50的玻璃化转变区域上方的储能模量从约3.9MPa增加到7.16MPa。此外，对玻璃化转变温度（T _g）值的研究表明，添加纳米二氧化硅后，化合物中的EPDM和CR的相容性增强，从而有助于改善化合物的性能。另外，样品的机械性能的结果表明，用10phr的纳米二氧化硅改性后的抗拉强度，断裂伸长率和CR50的模量分别增加了约398％，33％和135％。