Superelectrophiles in Polymer Chemistry. A Novel, One-Pot Synthesis of High-T_g, High-Temperature Polymers

Efficient π-conjugated interrupted host polymer by metal-free polymerization for blue/green phosphorescent light-emitting diodes

“…The completely disappeared signal for H g in the 1 H NMR spectrum of PICzFB indicates the exceptional selectivity of copolymerization. The results agreed with the literatures in which cyclic α‐diketones of acenaphthenequinone would generate highly reactive electrophiles in TFSA, which reacted with aromatic hydrocarbons to yield high molecular weight polymers. In our example, N ‐methylisatin provided highly electrophiles reactive cyclic α‐diketones in TFSA, which made the reaction exclusively at the electron‐rich aromatic hydrocarbons of carbazole moiety leading to high regioselective linear polymer with relatively high molecular weight.…”

Non‐Stoichiometric Polycondensations and the Synthesis of High Molar Mass Polycondensates

“…Afterwards, numerous authors contributed papers and patents to this field of work and, in 1907, Baekeland patented a procedure suitable for the technical production of Bakelite based on the polycondensation of phenol and formaldehyde 63, 64. Over the last ten years, Zolotukhin et al have reported several times on trifluoromethane sulfonic acid (triflic acid) catalyzed polycondensations of fluorinated ketones with various aromatic monomers, such as biphenyl, diphenyl ether or 4,4‐diphenoxybenzophenone 65–72. This process may yield high molar mass polymers when catalyzed by triflic acid and when the ketone is used in excess.…”

New biobased non-ionic hyperbranched polymers as environmentally friendly antibacterial additives for biopolymers

“…Such a high T g was due to their highly rigid molecular structures, which was consistent with the previously reported polymers based on isatin or other 1,2-quinones. 73,74,76 It was also noted that HBP 5 showed higher T g compared with 6, which was ascribed to the strong polar interactions of the isatin units in 5, as well as the increased free volume of 6 caused by the flexible methoxy end-groups. 77 HBPs 5 and 6 are both amorphous without a melting endotherm, which is clearly different from the small molecules 4 and 7 (melting points of 105 and 144°C, respectively).…”