Structure-property relationships in copolyester fibers and composite fibers

DMA;PET;Fiber spinning;Copolymer crystallization;Orientation;Morphology;Tensile tests

Ma, Hongming ; Chemistry and Biochemistry

University:Georgia Institute of Technology

Department:Chemistry and Biochemistry

关键词: DMA;    PET;    Fiber spinning;    Copolymer crystallization;    Orientation;    Morphology;    Tensile tests;   

Others  :  https://smartech.gatech.edu/bitstream/1853/5206/1/Ma_Hongming_200405_phd.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

Polyethylene terephthalate is one of the most important engineering thermal plastics used for fibers, films and bottles.Despite its wide applications and vast global market, PET has shortcomings, which limits it usage in many areas. PET has a glass transition temperature (Tg) of 80 DEGREE Celsius, this temperatureis too low for certain applications. Increase in glass transition temperature, high temperature mechanical properties, and dimensional stability is of great importance to further expand the applications of PET. Significant research efforts have been made toward this goal, using a variety of approaches.In this work, we attempt to improve the properties of PET melt spun filament. Three strategies has been investigated (i) copolymerization of more rigid comonomer, 4, 4' bibenzoate unit into the PET structure, (ii) UV crosslinking of functionalized PET fiber,and (iii) Reinforcing PET matrix with carbon nanofibers.