Multi-responsive polymers have attracted great attention in materials science. Herein, we report a tough self-reporting polyurethane elastomer with near infrared light induced shape memory. A radically exchangeable covalent 2,2′-bis(2-phenylindan-l,3-dione) bond is used as a dynamic covalent crosslink together with permanent crosslink and an organometallic complex carbolong 556 as a photothermal agent in the polyurethane network. The dynamic covalent 2,2′-bis (2-phenylindan-l,3-dione) bond, which is reversibly responsive to both thermal and mechanical stimuli, endows the elastomer with high toughness, mechanochromism, thermochromism, photothermochromism and shape memory behavior which can be triggered by direct heating or near infrared light irradiation mediated by the carbolong 556. Mechanochromism and thermochromism/photothermochromism are practically useful to self-reporting of mechanical failure and thermal condition, respectively. The near infrared light responsiveness facilitates a precisely spatial and temporal control of the shape memory behavior. This strategy opens up new opportunities to smart polymers.

多响应聚合物在材料科学中引起了极大的关注。在此，我们报告了一种具有近红外光诱导形状记忆的坚韧自报告聚氨酯弹性体。可自由基交换的共价 2,2'-双（2-苯基茚满-1,3-二酮）键用作动态共价交联以及永久交联和有机金属配合物碳氢化合物 556 作为聚氨酯网络中的光热剂。动态共价 2,2'-双 (2-苯基茚满-l,3-二酮) 键对热和机械刺激具有可逆响应，赋予弹性体高韧性、机械致变色、热致变色、光热致变色和形状记忆行为。可以通过直接加热或由 carbolong 556 介导的近红外光照射触发。机械致变色和热致变色/光热致变色分别对机械故障和热条件的自我报告非常有用。近红外光响应有助于对形状记忆行为进行精确的空间和时间控制。这一战略为智能聚合物开辟了新的机遇。