The incompatibility between hydrophilic silica and hydrophobic rubber is an important problem on using silica in nonpolar rubber. In this study, hydroxyl telechelic natural rubber (HTNR) that contains hydroxyl‐terminated groups was introduced into silica‐reinforced natural rubber (NR) in order to improve the bonding strength between rubber and silica. The properties of silica‐reinforced NR compounds and vulcanizates as a function of varying silica contents were evaluated at a fixed HTNR concentration at 8% wt/wt of silica content. The results show that the improvement of silica dispersion and decreasing of filler–filler interactions (Payne effect) were obtained in the NR compounds and vulcanizates with HTNR addition. The enhancements in tensile properties, crosslink density, abrasion resistance, heat build‐up, and thermal properties of the silica‐reinforced NR vulcanizates with added HTNR confirmed that HTNR performed good as interfacial modifier of silica. In the study, the optimum properties of silica‐reinforced NR vulcanizate were achieved at 30 phr silica with 2.4 phr HTNR. However, HTNR still showed poorer efficiency than the synergy between commercial silane coupling agent, bis [3‐(triethoxysilyl) propyl] tetrasulphide (TESPT) and diphenylguanidine (DPG) when used in silica‐reinforced NR vulcanizate. J. VINYL ADDIT. TECHNOL., 26:291–303, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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羟基远螯天然橡胶作为界面改性剂增强了二氧化硅与天然橡胶的界面相互作用

亲水性二氧化硅和疏水性橡胶之间的不相容性是在非极性橡胶中使用二氧化硅的重要问题。在这项研究中，将含有羟基封端基团的羟基远螯天然橡胶（HTNR）引入到二氧化硅增强天然橡胶（NR）中，以提高橡胶与二氧化硅之间的粘合强度。在固定的HTNR浓度（二氧化硅含量8％wt / wt）下，评估了二氧化硅增强的NR化合物和硫化橡胶随二氧化硅含量变化的性能。结果表明，加入NRNR的NR化合物和硫化橡胶中，二氧化硅的分散性得到改善，填料与填料之间的相互作用降低（佩恩效应）。拉伸性能，交联密度，耐磨性，热量积累，添加了HTNR的二氧化硅增强的NR硫化橡胶的热性能和热性能证实了HTNR作为二氧化硅的界面改性剂表现良好。在这项研究中，二氧化硅增强的NR硫化橡胶的最佳性能是在30 phr二氧化硅和2.4 phr HTNR的条件下实现的。但是，当用于二氧化硅增强的NR硫化橡胶时，HTNR仍比市售的硅烷偶联剂，双[3-（三乙氧基甲硅烷基）丙基]四硫化物（TESPT）和二苯基胍（DPG）之间的协同作用更差。J.乙烯基添加物。TECHNOL。，26：291–303，2020.©2019塑料工程师协会 当用于二氧化硅增强的NR硫化橡胶时，HTNR仍显示出比市售硅烷偶联剂，双[3-（三乙氧基甲硅烷基）丙基]四硫化物（TESPT）和二苯基胍（DPG）之间的协同作用差的效率。J.乙烯基添加物。TECHNOL。，26：291–303，2020.©2019塑料工程师协会 当用于二氧化硅增强的NR硫化橡胶时，HTNR仍显示出比市售硅烷偶联剂，双[3-（三乙氧基甲硅烷基）丙基]四硫化物（TESPT）和二苯基胍（DPG）之间的协同作用差的效率。J.乙烯基添加物。TECHNOL。，26：291–303，2020.©2019塑料工程师协会