Glycerol citrate polyesters produced through heating without catalysis

作者：Tisserat Brent^*; O' kuru Rogers Harry; Hwang HongSik; Mohamed Abdellatif A; Holser Ronald

来源：Journal of Applied Polymer Science, 2012, 125(5): 3429-3437.

DOI：10.1002/app.36669

• biopolymers
• blending
• differential scanning calorimetry
• esterification
• thermogravimetric analysis

The influence of various heating methods without catalysis to prepare polyesters from citric acid : glycerol blends were studied. In the presence of short-term microwave treatments, i.e., 60 s at 1200 W, blends of glycerol and citric acid invariably formed solid amorphous polyesters. Fourier transform infrared spectroscopy showed that citric acid and glycerol blends can form highly stable polymers composed of ester bonds. The glycerol citrate polyester polymers exhibited the least degradation in water, more in acid solutions (0.11.0M HCl), and the most deterioration in strong alkaline solutions (0.11.0M NaOH) after 72 h soakings. Polyesters of glycerol and citric acid were studied with differential scanning calorimetry and thermal gravimetric analysis. The polyesters were found to be thermally stable (up to 313 degrees C).

• 出版日期2012-9-5