Melt flow and fiber properties of copolyesters

✍ Scribed by Zhang Hong; Li Shengping; Luo Honglie

• Book ID: 101585107
• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 499 KB
• Volume: 34
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1987.070340403

✦ Synopsis

Department of Polymer Science and M a t e d , Chengch University of Science and Technology, People's Republic of China synopsis The effect of modifying monomer [sodium 3,5-di(carbonethoxy)benzene sulfonate] contents range from 1.5 to 4.5 mol '% on the melt flow and fiber properties of copolyesters (COPET) dyeable with basic dyes was investigated. An Instron capillary rheometer was used to obtain data over shear rates ranging f k m 10 to lo4 s-l at 265,275, and 285OC. The COPETs flow properties as a function of temperature, inherent viscosity, melting point, and modifying monomer content were determined. The drawn fibers axmenled in oil and air at 80, 110, 130, 150, 175, and 200T

were studied by means of measurements of shrinkage ratio, crystallinity, birefringence, long period, sonic rate, and static state flexibility of molecular chain. All these showed that the large side group, -SO,Na, in COPE2 molecular chains cause an increase in chain rigidity and melt viscosity, and a decrease in crystallinity and orientation.