ASIA unversity:Item 310904400/8635
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    题名: Amorphous copolyesters based on 1,3/1,4-cyclohexanedimethanol: Synthesis, characterization and properties
    作者: Tsai, Yuhsin;Fan, Cheng-Hsing;Hung, Chi-Yuan;Tsai, Fuu-Jen
    贡献者: Department of Biotechnology
    关键词: ABS resins;Acids;Copolymerization;Differential scanning calorimetry;Digital cameras;Ethylene;Ethylene glycol;Glycols;Laser interferometry;Naphthalene;Nuclear magnetic resonance;Nuclear magnetic resonance spectroscopy;Polymers;Shrinkage;Simulated annealing;Amorphous;Amorphous copolyesters;Co polyesters;Copolymer compositions;Dsc and tga;Heating temperatures;Naphthalene dicarboxylic acids;Nmr spectroscopies;Optical characteristics;Optical-;Ray analyses;Shrinkage properties;Succinic acids;Terephthalic acids;Thermal behaviors
    日期: 2008
    上传时间: 2010-04-07 13:17:59 (UTC+0)
    出版者: Asia University
    摘要: Two series of amorphous copolyesters, PETGN and PETGS, were synthesized by the copolymerization of 2,6-naphthalene dicarboxylic acid (NDA) (0-40%), succinic acid (SA) (0-40%), 1,3/1,4-cydohexanedimethanol (1,3/1,4-CHDM) (10-50%), ethylene glycol (EG), and terephthalic acid (TPA). The compositions and molecular weights of the copolyesters were determined by <sup>1</sup>H NMR spectroscopy and viscometry, respectively. The thermal behaviors were studied over the entire range of copolymer compositions, using DSC and TGA. The optical characteristics, heat-shrinkable effects and tensile properties of these polymers were also determined. Experimental results indicated that the thermal, optical, tensile, and shrinkage properties of PETGN and PETGS were functions of NDA or SA content. DSC and X-ray analysis demonstrated that both PETGN and PETGS series were amorphous. Incorporating NDA and SA influenced the T<inf>g</inf> values of those polymers, from about 37°C for PETG<inf>30</inf>S <inf>40</inf> to 89°C for PETG<inf>30</inf>N<inf>40</inf>. Furthermore, the shrinkage of these amorphous copolyesters was more than 40% when the heating temperature was higher than the corresponding T<inf>g</inf>. © 2008 Wiley Periodicals, Inc.
    關聯: Journal of Applied Polymer Science 109:2598-2604
    显示于类别:[生物科技學系] 期刊論文

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