Poly(ethynylene-2,5-thiophenediylethynylenes). Processable, reactive polymers that thermally cross-link

Construction of Donor–Acceptor Chromophores in Platinum Polyyne Polymer by [2 + 2] Cycloaddition of Organic Acceptors

“…The reagents were purchased from Kanto, Tokyo Kasei, and Wako and used as received. 2,5‐Diethynyl‐3‐hexylthiophene was synthesized according to the literature method 10…”

An improved synthesis of poly(p-phenylenebutadiynylene)s

“…This result likely reflects the poor stability of 8, which undergoes fairly rapid decomposition at room temperature. 23 …”

“…In contrast, structurally analogous poly(p-phenylenebutadiynylene)s have received relatively little attention, 14 -20 presumably because of the dearth of appropriate meth-ods for synthesizing these materials. Nonetheless, these polymers are interesting targets, both as conjugated materials and, via their butadiyne linkages, as precursors of thiophenes, 22 pyrroles, 23,24 and poly(diacetylene)s. 25,26 Butadiynes have been prepared both by copper-mediated homocoupling reactions of terminal acetylenes 27,28 and by cross-coupling methods 29,30 such as the Cadiot-Chodokiewicz reaction of a terminal acetylene with a haloacetylene. Only limited attempts to apply these reaction conditions to the synthesis of poly(p-phenylenebutatdiynylene)s have been reported, however, and the resulting materials had only low molecular weights [number-average molecular weight (M n ) Յ 11,500].…”

High‐performance aromatic thermosetting resins with hydroxyl and ethynyl groups

“…Addition curable resins with improved thermal and pyrolytic characteristics are the attractive matrices in high‐temperature composite materials. On thermal curing, they provide a three‐dimensional network exhibiting excellent comprehensive properties including high‐glass transition temperature, good thermal stability, moisture and solvent resistance, and promising mechanical properties 2. Polyarylacetylene (PAA Fig.…”