Mechanochromic Break Points Control the Toughness of Entangled Polyphenylenes
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Toughness engineering of a kinked polyphenylene (PmmpP) is demonstrated by using mechanochromic molecular break points. Varying amounts of thermally stable yet mechanically labile difluorenylsuccinonitrile (DFSN) motifs incorporated into PmmpP allow to largely... ...