A Convenient Room Temperature Polycondensation Toward Hyperbranched AB(2)-Type All-Aromatic Polyesters with Phenol Terminal Groups

作者：Erber Michael; Boye Susanne; Hartmann Tobias; Voit Brigitte I; Lederer Albena^*

来源：Journal of Polymer Science Part A: Polymer Chemistry , 2009, 47(19): 5158-5168.

DOI：10.1002/pola.23567

• chromatography
• hyperbranched
• polycondensation
• polyesters

As a convenient alternative to the classical melt polycondensation the one-pot solution polycondensation of suitable AB(2) monomers under mild conditions has been successfully adapted to hyperbranched all-aromatic polyester with phenol terminal groups. The polymerization was performed in solution at room temperature directly using commercially available 3,5-dihydroxybenzoic acid as monomer and 4(dimethylamino) pyridinium 4-tosylate as catalyst to suppress the formation of N-acylurea. Different carbodiimides as coupling agents were investigated to find the optimal esterification conditions. The polymers have been characterized extensively and were compared with their well-known analogs synthesized in melt. The characterization was carried out by NMR spectroscopy, size exclusion chromatography, and asymmetric flow-field flow fractionation as an alternative separation technique for multifunctional polymers.

• 出版日期2009-10-1