Hydrophilic fillers contain functional groups capable of forming hydrogen and/or ionic bonds. Many recent developments with biobased fillers are masterbatch process with rubber latex. The effect of the different process influences the characteristics of filler network and therefore rubber properties. In this study, the rubbers reinforced with hydrophilic filler, soy protein particles, and carbon black processed in two different methods, casting and freeze-drying methods, are investigated using crosslink density, dynamic mechanical properties, stress softening effect, stress relaxation, tensile properties, and thermal degradation. Stress softening effect is analyzed with the Kraus model and shows that the characteristic strains shifted to smaller strains for the rubbers prepared by a casting process. Stress relaxation of the reinforced rubber prepared from the two different processes shows that the rubbers from the casting process have slower relaxation rates because of higher crosslink density and modulus. Overall, the rubber composites prepared by casting method have higher crosslink density, greater softening effect, slower rate of stress relaxation, and higher moduli attributed to greater interactions between hydrophilic components in the reinforced rubber.

亲水性填料包含能够形成氢和/或离子键的官能团。生物基填料的许多最新进展是橡胶胶乳的母料工艺。不同工艺的影响会影响填料网络的特性，进而影响橡胶性能。在这项研究中，使用交联密度，动态力学性能，应力软化效果，应力松弛，拉伸性能，研究了用亲水性填料，大豆蛋白颗粒和炭黑两种方法加工的橡胶，这两种方法分别是浇铸法和冷冻干燥法。以及热降解。用Kraus模型分析了应力软化效果，结果表明，通过铸造工艺制备的橡胶的特征应变向较小应变转移。由两种不同方法制备的增强橡胶的应力松弛表明，由于较高的交联密度和模量，来自浇铸过程的橡胶具有较慢的松弛速率。总体而言，通过流延法制备的橡胶复合材料具有较高的交联密度，较大的软化效果，较慢的应力松弛速率以及较高的模量，这归因于增强橡胶中亲水性组分之间的较大相互作用。