Rotaxane-Based Difunctional Nitrile N-Oxide Crosslinker : Synthesis and Direct Introduction of Movable Crosslinking Points into Ethylene-Propylene-Butadiene Monomer(EPDM) Rubber
Rotaxane-Based Difunctional Nitrile N-Oxide Crosslinker : Synthesis and Direct Introduction of Movable Crosslinking Points into Ethylene-Propylene-Butadiene Monomer(EPDM) Rubber
复制标题
轮烷基双官能腈氮氧化物交联剂：合成以及将可移动交联点直接引入三元乙丙橡胶 (EPDM) 中
DOI：
10.1002/marc.202000639
复制
发表时间：
2021
影响因子：
4.6
通讯作者：
Takata Toshikazu
中科院分区：
文献类型：
--
作者：
Sogawa Hiromitsu;Tsutsuba Toyokazu;Sakiyama Naoto;Ikeda Tatsuhito;Takata Toshikazu
将轮烷支架并入聚合物网络的交联点显著影响其流变学和机械性能。本研究涉及一种新型轮烷型交联剂的合成，该交联剂在车轴和车轮组件上均含有腈N ‐氧化物官能团。所制备的交联剂具有高度反应性;然而，它可以在不存在添加剂和催化剂的情况下被分离并应用于商业上重要的聚合物，即乙烯-丙烯-丁二烯单体橡胶（EPDM）的交联反应中。拉伸试验表明，与含有常规交联点的网络相比，由于引入了可移动的交联点，本文制备的网络结构的断裂强度和应变都得到了改善。合成的网络结构也表现出五倍高的断裂能。将可移动交联点直接引入预成型聚合物中的后交联方法在生产用于各种应用的轮烷材料中将是有价值的。
Incorporation of rotaxane scaffolds into the crosslinking points of polymer networks significantly affects their rheological and mechanical properties. The present study involves the synthesis of a new rotaxane‐type crosslinker containing nitrileN‐oxide functional groups on both the axle and wheel components. The prepared crosslinker is highly reactive; however, it can be isolated and applied in the crosslinking reaction of a commercially important polymer, namely ethylene‐propylene‐butadiene monomer rubber (EPDM), in the absence of additives and catalysts. Tensile tests reveal that compared to a network containing conventional crosslinking points, both breaking strength and strain of the network structure prepared herein are improved due to the incorporation of movable crosslinking points. The synthesized network structure also exhibits five times higher fracture energy. The developed post‐crosslinking methodology for the direct introduction of movable crosslinking points into pre‐formed polymers will be valuable in the production of rotaxane materials for various applications.