Open-Structured Silica Network Based on Silane-Terminated Telechelic Polybutadiene for Electric Vehicle Tires

作     者：Lim, Kiwon Hong, Seung Jae Lee, Hyungjae Jung, Jaehyun Kim, Kihyun Park, Jong Hyuk Bang, Joona 

作者机构：Department of Chemical and Biological Engineering Korea University 145 Anam-ro Seongbuk-gu Seoul02841 Korea Republic of R&D Center Hankook Tire and Technology Co. Ltd. 50 Yuseong-daero 935beon-gil Yuseong-gu Daejeon34127 Korea Republic of  5 Hwarang-ro 14-gil Seongbuk-gu Seoul02792 Korea Republic of 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Silica 

摘      要：The transition from combustion engine vehicles to electric vehicles (EVs) is a critical step towards a sustainable future. EVs increasing popularity poses challenges for tire makers, such as accommodating extra weight, managing instant torque, reducing noise, and improving driving range. Meeting these demands involves substantially reducing the rolling resistance of tire tread composites while simultaneously enhancing their mechanical stiffness and wear resistance. To overcome these issues, we introduce an open-structured silica network based on silane-terminated liquid-like telechelic polybutadienes in rubber composites. Our approach can improve the tan δ values at 60°C, indicating reduced rolling resistance, enhanced mechanical strength, and decreased abrasion losses compared to conventional composites. The internal structure of the proposed composites is characterized by X-ray computed tomography and transmission electron microscopy. A significant improvement in the micro-dispersion of silica clusters, without altering the macro-dispersion, is observed in the composites employing silane-terminated butadiene. This suggests the formation of an open-structured silica network with interstitial spaces between the aggregates. In this case, polymer chains permeate the interstices in the network, leading to a considerable reduction in the friction between particles. These findings offer highly suitable insights for developing tires tailored to the unique demands of EVs. © 2024, The Authors. All rights reserved.