Natural-rubber-based chiral polyesters as acoustic damping materials: synthesis and characterization

摘要

Abstract: Development of new viscoelastic materials were attempted. New damping materials were developed starting from hydroxyl terminated liquid natural rubber prepared by photodepolymerization of coagulated natural rubber latex by reacting with 1,4:3,6-dianhydro D-Sorbitol (isosorbide) and terephthaloyl chloride/(bis-2-Chloroformyl, 4-nitrophenyl) terephthalamide. The copolyesters were characterized by spectral and thermal techniques. Inherent viscosity and optical activities were measured. The damping performance as studied using DMA technique, was found to be superior compared to starting natural rubber.!10