Polymeric multimaterials by photochemical patterning of crystallinity
Polymeric multimaterials by photochemical patterning of crystallinity
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DOI：
10.1126/science.add6975
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发表时间：
2022-10-14
期刊：
影响因子：
56.9
通讯作者：
Page, Zachariah A.
中科院分区：
文献类型：
--
作者：
Rylski, Adrian K.;Cater, Henry L.;Page, Zachariah A.
单一材料中刚性和弹性区域的有组织的组合可以协同地定制整体机械性能。然而，实现这种复杂建筑的合成方法仍然难以捉摸。我们报道了一种快速、简便和环境友好的方法，利用工业单体顺式环辛烯的立体可控开环歧化聚合，在软性和弹性基质中形成坚硬的半晶相。双重聚合催化决定了聚烯烃骨架化学，这使得成分均匀的材料具有无缝的刚性和弹性界面的图案化成为可能。可见光诱导复分解催化剂的活化可形成半晶反辛烯橡胶，优于室温下形成的顺式多辛烯橡胶。这种自下而上的方法提供了一种制造聚合物材料的方法，在软光电子学和机器人领域具有广阔的应用前景。
An organized combination of stiff and elastic domains within a single material can synergistically tailor bulk mechanical properties. However, synthetic methods to achieve such sophisticated architectures remain elusive. We report a rapid, facile, and environmentally benign method to pattern strong and stiff semicrystalline phases within soft and elastic matrices using stereocontrolled ring-opening metathesis polymerization of an industrial monomer, cis-cyclooctene. Dual polymerization catalysis dictates polyolefin backbone chemistry, which enables patterning of compositionally uniform materials with seamless stiff and elastic interfaces. Visible light-induced activation of a metathesis catalyst results in the formation of semicrystalline trans polyoctenamer rubber, outcompeting the formation of cis polyoctenamer rubber, which occurs at room temperature. This bottom-up approach provides a method for manufacturing polymeric materials with promising applications in soft optoelectronics and robotics.