Diacid architecture effect on the synthesis and microstructure of rigid‐rod poly(benzobisthiazole)s

Abstract

Six poly(benzobisthiazole)s (PBTs) have been synthesized by the solution polycondensation of 2,5‐diamino‐1,4‐benzenedithiol in poly(phosphoric acid) (PPA) with systematically varied diacids to demonstrate the diacid architecture effect of the aromatic heterocyclic rigid‐rod polymers. The role of PPA is identified and the effects of phosphorus pentoxide and water on PBT during polycondensation are discussed. Polymer properties such as the inherent viscosity and decomposition temperature are correlated to the diacid chemistry. The effect of diacid architecture on the synthesis and microstructure of PBT is studied. The results are discussed in terms of resonance, symmetry, and solubilization of the diacids. Copyright © 2006 Society of Chemical Industry

Hyperbranched Polybenzobisthiazole with High Thermal Stability, Good Organosolubility, and Interesting Optical Performance

“…Typical absorption of the DABDT (A 2 monomer) at 2460 cm −1 (SH) and 2580 cm −1 (NH 3 Cl) becomes less noticeable in the FTIR spectra of HBPBZTs. Instead, there are out‐of‐plane heteroring deformation at ≈680 cm −1 , 1,3,5‐trisubstituted benzene at 1047 cm −1 , heteroring stretching at ≈1394 cm −1 , CS vibration at 1504 cm −1 , and hetero‐ring stretching associated with the thiazole ring by the strong CN band at 1640 cm −1 31. This confirms that the synthesized polymers are the desired polymers.…”

Alumina additives for fast iron‐mediated AGET ATRP of MMA using onium salt as ligand

“…42,43 Among these ATRP metal catalysts, iron salt as AGET ATRP metal catalyst was widely used owing to its low toxicity, readily abundance, and biocompatibility in spite of iron complexes seem generally inferior to the copper or ruthenium for the control of polymerization. Like other metal complexes, the catalytic performance for iron complexes such as activity and controllability over polymerization clearly depends on ligands such as triphenylphosphine, 30 half-metallocene, 44,45 organic acid, [46][47][48] and onium salts, [49][50][51] which provides appropriate solubility and an adjustable redox potential to the metal complexes.…”

Structural architectures of polymer proton exchange membranes suitable for high-temperature fuel cell applications

“…PBIs are a kind of high-performance amorphous polymers containing N-heterocycles with outstanding mechanical, thermal, and nonflammability properties at temperatures of up to 300°C [97][98][99]. The T g of aromatic PBIs is about 425-436°C, which is promising for HT-PEMs [29].…”