MATERIAL DEVELOPMENT ON FLAME RETARDANT POLYESTER COMPOSITIONS WITH IMPROVED FLOWABILITY

摘要

Polyesters are widely used in automotive and electrical industry parts due to their excellent electrical, mechanical and molding properties. However, as the industry is driving/evolving towards miniaturization of parts it is a challenge to develop polyester compositions with high flow properties in order to fill the thin wall molds/parts. Furthermore, flow improvement is more challenging in filled polyester compositions as these have substantially higher viscosity than corresponding neat polyesters. We reported last year a novel additive approach to improve flow properties of polyesters via reactive extrusion. In the present study, we discuss the development of new high flow polyester flame retardant compositions using extrusion process and flow additives. The correlation between standard viscosity measurements and spiral flow measurements in thin wall molds is also discussed. In addition spiral flow data at wide range of temperatures and thickness are also reported.