Kim Donghyuk, Yeom Gyeongdong, Joo Hongil, Ahn Byungkyu, Paik Hyun-Jong, Jeon Heungbae, Kim Wonho
School of Chemical Engineering, Pusan National University, Busan 46241, Korea.
Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Korea.
Polymers (Basel). 2021 Aug 12;13(16):2698. doi: 10.3390/polym13162698.
Recently, research conducted on tread compounds with liquid butadiene rubber (LqBR) have been conducted in the tire industry. In particular, the introduction of functional groups into LqBRs is expected to lower hysteresis loss caused by the free chain ends of LqBR. To study this, LqBRs with functional groups at different positions were synthesized. The occurrences of in-chain and chain-end functionalization of functionalized LqBRs (F-LqBRs) were confirmed, the microstructure and functionalization efficiency of F-LqBRs were calculated through the characterizations. This novel functionalization technology was beneficial not only to immobilizing the free chain ends of LqBRs to the surfaces of silica to decrease the number of free chain ends, but also chemically bonding the LqBR chains on the base polymer through a crosslinking reaction to enhance the filler-rubber interaction. The effects of the functional group position and number of the free chain ends on the physical properties and hysteresis of the compounds were investigated by partially replacing the treated distillate aromatic extract (TDAE) oil with LqBR in silica-filled rubber compounds. The results showed that compounds that had applied DF-LqBR with both end functionalization performed better, including improving the silica dispersion, higher extraction resistance, and lower rolling resistance, than other F-LqBRs compounds.
最近，轮胎行业对含有液态丁二烯橡胶（LqBR）的胎面胶进行了研究。特别是，预计在LqBR中引入官能团可降低由LqBR的自由链端引起的滞后损失。为了研究这一点，合成了在不同位置带有官能团的LqBR。确认了官能化LqBR（F-LqBR）的链内和链端官能化的发生情况，通过表征计算了F-LqBR的微观结构和官能化效率。这种新型官能化技术不仅有利于将LqBR的自由链端固定在二氧化硅表面以减少自由链端的数量，而且通过交联反应将LqBR链化学键合在基础聚合物上，以增强填料与橡胶的相互作用。通过在二氧化硅填充的橡胶胶料中用LqBR部分替代处理过的馏出芳烃抽出物（TDAE）油，研究了官能团位置和自由链端数量对胶料物理性能和滞后性能的影响。结果表明，应用两端官能化的DF-LqBR的胶料比其他F-LqBR胶料表现更好，包括改善二氧化硅分散性、更高的抗抽出性和更低的滚动阻力。
