In the context of pneumatic tires, high durability and fuel efficiency reside in a trade-off relationship. This problem may be solved by the introduction of hydrogen bonds into cured rubber, as elastic materials with hydrogen bonds exhibit a different strain dependence of their energy dissipation compared to elastic materials with conventional chemical bonds. Herein, we have applied cross-metathesis reactions between polybutadienes and olefin-containing polyurethanes to the synthesis of novel polybutadienes with urethane linkages as a source of hydrogen bonds in the polymer main chain (PBUs). A series of PBUs with different contents of urethane linkages was synthesized by changing the feed ratios of the polybutadiene and olefin-containing polyurethanes in cross-metathesis reactions, and the resulting PBUs were characterized in order to examine the effect of the hydrogen bonds on the macroscopic mechanical properties. Cured rubber materials prepared from PBUs exhibit higher tearing energy and energy dissipation at high strains compared to conventional control rubber samples, and the tearing energy related to energy dissipation at high strains improves with increasing urethane content. Therefore, the present approach represents a powerful strategy for conciliating durability and fuel efficiency in cured rubbers.

在充气轮胎的情况下，高耐久性和燃料效率处于折衷关系。该问题可通过将氢键引入到硫化橡胶中来解决，因为具有氢键的弹性材料与具有常规化学键的弹性材料相比，其能量耗散表现出不同的应变依赖性。在本文中，我们将聚丁二烯和含烯烃的聚氨酯之间的交叉复分解反应应用于合成具有氨基甲酸酯键作为聚合物主链（PBU）中氢键来源的新型聚丁二烯。一系列PBU通过在交叉复分解反应中改变聚丁二烯和含烯烃的聚氨酯的进料比，合成了具有不同氨基甲酸酯键含量的化合物，并对所得的PBU进行了表征，以检验氢键对宏观机械性能的影响。与传统的对照橡胶样品相比，由PBU制备的固化橡胶材料在高应变下表现出更高的撕裂能量和能量耗散，并且与高应变下的能量耗散有关的撕裂能随着聚氨酯含量的增加而提高。因此，本方法代表了一种用于调和固化橡胶的耐久性和燃料效率的有效策略。