Alkyl-substituted poly(2,5-benzophenone)s synthesized via Ni(0)-catalyzed coupling of aromatic dichlorides and their miscible blends

Abstract

High molecular weight poly(2,5‐benzophenone) derivatives were prepared by Ni(0)‐catalyzed coupling of 4′‐substituted 2,5‐dichlorobenzophenones. Monomers were synthesized by the Friedel–Crafts reaction of 2,5‐dichlorobenzoyl chloride and alkyl‐substituted benzenes in the presence of aluminum chloride. The resulting polymers are soluble and show no evidence of crystallinity by DSC. Number average molecular weights are in the range of 9.2 × 103–11.7 × 103 g/mol by multiple angle laser light scattering (MALLS). Molecular weights obtained by MALLS are only slightly lower (∼90%) than those obtained by GPC (polystyrene standards). These polymers exhibit high thermal stability with glass transition temperatures ranging from 173 to 225°C and weight loss occurring above 450°C in nitrogen and 430°C in air. Additionally, the polymers were blended and the resulting polymer films appear to be miscible by DSC results. © 1998 John Wiley & Sons, Inc. J. Polym. Sci. A Polym. Chem. 36: 2611–2618, 1998

Multiblock copolymers based on poly(p-phenylene)-co-poly(arylene ether sulfone ketone) with sulfonated multiphenyl pendant groups for polymer electrolyte fuel cell (PEMFC) application

“…4-(2 0 ,3 0 ,4 0 ,5 0 ,6 0 -Pentakis-phenylbenzen)phenol (sexyphenylene-OH) was prepared as described in the literature [23]. 2,5-Dichloro-4 0 -fluorobenzophenone (2,5-DCFBP) and 2,5-dichlorobenzophenone (2,5-DCBP) were prepared as described in the literature [24,25].…”

Triplet energy harvesting by lanthanides in conjugated polymers

“…The acid chloride of the appropriate commercially available dichlorobenzoic acid was formed from thionyl chloride and coupled with toluene to give the benzophenone monomers 1 and 2. 8 Finally, the benzophenones were polymerized and purified according to published procedures, 9,10 as shown in Scheme 1.…”

Synthesis and Properties of Novel Fluorinated Poly(phenylene‐co‐imide)s

“…Broad and strong absorption band at about 3 300 cm À1 was assigned to the -OH absorption band in FT-IR spectra. [6,7] In Figure 1, the FT-IR spectra of copolymers displayed no broad and strong -OH absorption band at about 3 300 cm À1 which was relative to reduction of carbonyl functionalities, which gave good proofs that no reduction of carbonyl functionalities could be observed in copolymerization. The 19 F NMR spectrum of PI-50 ( Figure 2) exhibits four peaks of fluorine atoms integrated in the ratio of 2:1:1:1.…”

“…[10][11] Copolymerization is one of the most effective ways to produce the polymer with desirable properties. [6,[12][13][14] This method requires that the monomer is comparable with the catalyst system chosen for polymerization. Aromatic dichlorides containing phthalimide moieties can easily be prepared from 4-chlorophthalic anhydride and diamines.…”