Synthesis and Properties of Copolymer of Gallic Acid and Sulfamic Acid Catalyzing by HRP/H_2O_2

摘要

A phenolic copolymer (GASA) was synthesized from gallic acid (GA) and sulfamic acid (SAA) using horseradish peroxides (HRP)/H_2O_2 as catalyst. The effect of the main factors on yield of the copolymer was discussed. The results showed that the maximum yield of copolymer was obtained when molar ratios of GA and SAA was 1: 1 in the presence of 5 mg HRP at 35°C for 5.5 h. The structure of the copolymer was characterized by FTIR and NMR. The mechanism of polymerization of GASA was pointed out. The phenolic copolymer was used as tannage and retannage to making leather, the results showed that the copolymers has excellent tanning and retanning properties. The T_s of tanned leather reached 75°C and the retanning leather exhibited good service performance and mechanical strength.