Synthesis and Characterization of Hyperbranched Poly(arylene ether)s from a New Activated Trifluoro B3 Monomer Adopting an A2 + B3 Approach

✍ Scribed by Susanta Banerjee; Hartmut Komber; Liane Häußler; Brigitte Voit

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 253 KB
• Volume: 210
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200900117

✦ Synopsis

Abstract

A new trifluoromethyl‐activated trifluoro monomer was successfully prepared by Pd‐initiated coupling of 1,3,5‐tribromobenzene with 4‐fluoro‐3‐trifluoromethylphenylboronic acid. 1,3,5‐Tris(4‐fluoro‐3‐trifluoromethylphenyl)benzene (B~3~) leads to several hyperbranched poly(arylene ether)s when reacted with three different bisphenols (A~2~) in different molar ratios. The 1.5:1 molar product of A~2~/B~3~ showed very high molecular weight without significant gelation. The products have been well characterized by GPC, DSC, TGA, FTIR, and NMR techniques. The ^19^F NMR signals were used to calculate the degree of branching. The 1.5:1 molar products have excellent thermal stability and higher glass transition temperatures than their linear analogs.

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