Rotaxane‐Based Difunctional Nitrile N‐Oxide Crosslinker: Synthesis and Direct Introduction of Movable Crosslinking Points into Ethylene‐Propylene‐Butadiene Monomer (EPDM) Rubber,Macromolecular Rapid Communications

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Rotaxane‐Based Difunctional Nitrile N‐Oxide Crosslinker: Synthesis and Direct Introduction of Movable Crosslinking Points into Ethylene‐Propylene‐Butadiene Monomer (EPDM) Rubber
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2020-12-16 , DOI: 10.1002/marc.202000639
Hiromitsu Sogawa _{1,

2} , Toyokazu Tsutsuba ₁ , Naoto Sakiyama ₁ , Tatsuhito Ikeda ₁ , Toshikazu Takata _{1,

3}

Affiliation

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 nitrile N‐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.

中文翻译：

基于轮烷的双官能丁腈氧化交联剂：可移动交联点的合成和直接引入乙烯-丙烯-丁二烯单体（EPDM）橡胶中

轮状烷支架掺入聚合物网络的交联点显着影响其流变和机械性能。本研究涉及合成一种新的含腈氮的轮烷型交联剂在轮轴和车轮组件上氧化官能团。所制备的交联剂具有高反应活性。但是，在没有添加剂和催化剂的情况下，它可以被分离并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。拉伸测试表明，与包含常规交联点的网络相比，由于并入了可移动的交联点，因此改善了本文制备的网络结构的断裂强度和应变。合成的网络结构还显示出五倍的断裂能。将可移动交联点直接引入到预成型聚合物中的发达的后交联方法学，对于用于各种用途的轮烷材料的生产将是有价值的。

更新日期：2020-12-16

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