Mohamadi Hediye, Motiee Fereshteh, Taghvaei-Ganjali Saeed, Saber-Tehrani Mandana
Acta Chim Slov. 2021 Mar;68(1):128-136.
In this research the influence of the silica supported calix[4]arene derivative (SS-Calix) on the reversion resistance, mechanical properties and thermal behavior of NR/BR tire tread formulation was investigated by the oscillating disc rheometer, FTIR, TGA and tensile testing. The results revealed that the reversion behavior of NR/BR vulcanizate is affected by SS-Calix. The data obtained from curing characteristics and thermal stability of test pieces indicate that, SS-Calix acts as an anti-reversion for rubbery materials that are exposed to thermal shock in the early stages of temperature rise. It's predicted that these results are due to the interaction between the OH groups present in the SS-Calix surface and the carbon of the polymer chains. The broad peak observed in the IR spectrum around 1824 cm-1 which is referred to C=O bond, confirms this prediction. In addition, the presence of SS-Calix in compound causes to increase modulus and hardness but reduce elongation and resilience.
在本研究中，通过振荡盘流变仪、傅里叶变换红外光谱仪（FTIR）、热重分析仪（TGA）和拉伸试验，研究了二氧化硅负载杯[4]芳烃衍生物（SS - Calix）对天然橡胶/丁二烯橡胶（NR/BR）轮胎胎面胶料抗硫化返原性、力学性能和热性能的影响。结果表明，SS - Calix会影响NR/BR硫化胶的硫化返原行为。从试片的硫化特性和热稳定性获得的数据表明，SS - Calix对在温度上升初期受到热冲击的橡胶材料起到抗硫化返原剂的作用。据预测，这些结果是由于SS - Calix表面存在的羟基与聚合物链的碳之间的相互作用所致。在红外光谱中1824 cm-1附近观察到的归属于C=O键的宽峰证实了这一预测。此外，胶料中SS - Calix的存在会导致模量和硬度增加，但伸长率和回弹性降低。
