SYNTHESIS AND CHARACTERIZATION OF A NOVEL, HIGHLY BROMINATED, FLAME RETARD ANT POLYMER

摘要

A novel, highly brominated polymer was synthesized from pentabromo-6-ethoxybenzene vinyl ether using cationic polymerization. The thermal and rheological properties of the poly(pentabromo-6-ethoxybenzene vinyl ether) (PBrVE) were compared to the commercially available brominated flame retardant, poly(pentabromobenzyl acrylate) (PBrBA). In addition, polymer blends based on polybutylene terephthalate were prepared with the two brominated polymers and the thermal stability and rheological properties compared. The glass transition temperature of PBrVE was determined to be 103 °C which was 57 °C lower than that of PBrBA. The higher molecular mobility of PBrVE resulted in lower melt viscosity in blends with PBT which would be expected to provide enhanced processability with regard to creating injection molded parts with relatively thin walls, such as those encountered in the electronics industry. Characterization of the PBT blends using transmission electron microscopy indicated higher compatibility between PBT and PBrVE as compared to PBT and PBrBA.