Kim Do Young, Park Jae Woo, Lee Dong Yun, Seo Kwan Ho
Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Korea.
Polymers (Basel). 2020 Sep 4;12(9):2020. doi: 10.3390/polym12092020.
The extreme elasticity and reversible deformability of rubber, which is one of the most versatile polymers in modern society, is dependent on several factors, including the processing conditions, curing system, and types of additives used. Since the rubber's mechanical properties are influenced by the existing structural crosslinks, their correlation with the crosslink characteristics of rubber was investigated using the equilibrium swelling theory of the Flory-Rehner equation and the rubber-filler interaction theory of the Kraus equation. Herein, we examined whether the accelerator and reinforcement agent quantitatively contributed to chemical cross-linkages and rubber-filler interaction. In conclusion, the accelerator content supported the chemically crosslinked structures of the monosulfides and the disulfides in natural rubber (NR). Additionally, these results demonstrated that the mechanical properties and the thermal resistance of NR were dependent on the crosslink characteristics. The findings of this study provide an insight into the development and application of NR products for the mechanical optimization of rubber-based products.
橡胶是现代社会中用途最广泛的聚合物之一，其极高的弹性和可逆变形性取决于多个因素，包括加工条件、硫化体系以及所使用添加剂的类型。由于橡胶的机械性能受现有结构交联键的影响，因此利用弗洛里-雷纳方程的平衡溶胀理论和克劳斯方程的橡胶-填料相互作用理论，研究了它们与橡胶交联特性的相关性。在此，我们研究了促进剂和增强剂是否对化学交联以及橡胶-填料相互作用有定量贡献。总之，促进剂含量有助于天然橡胶（NR）中单硫化物和二硫化物的化学交联结构。此外，这些结果表明NR的机械性能和耐热性取决于交联特性。本研究结果为基于橡胶的产品进行机械优化的NR产品的开发和应用提供了见解。
