中國醫藥大學機構典藏 China Medical University Repository, Taiwan:Item 310903500/1185
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    题名: Synthesis and characterization of amorphous poly(ethylene terephthalate)copolymers containing bis[4-(2-hydroxyethoxy)phenyl]sulfone
    作者: 蔡育勳(Yuhsin Tsai);(Cheng-Hsing Fan);(Chi-Yuan Hung);蔡輔仁(Fuu-Jen Tsai)
    贡献者: 中醫學院中國醫學研究所
    关键词: Amorphous Copolymerization;Polyester;Microstructure;NMR
    日期: 2009-01
    上传时间: 2009-08-19 16:36:02 (UTC+8)
    摘要: Poly(ethylene terephthalate) copolymers (abbreviated as PETS) that contain bis[4-(2-
    hydroxyethoxy)phenyl]sulfone (BHEPS) were prepared from dimethyl terephthalate
    (DMT), ethylene glycol (EG) (5–95%) and BHEPS (5–95%). The compositions and microstructures
    of the copolyesters were determined by 1H and 13C nuclear magnetic resonance
    (NMR) spectroscopy, respectively. The thermal behaviors were studied over the entire
    range of copolymer compositions, using X-ray analysis, differential scanning calorimeter
    (DSC) and thermogravimetric analysis (TGA). The molecular weights, optical characteristics
    and tensile properties of these polymers were also determined. Experimental results indicated
    that the copolymers had a random microstructure. The intrinsic viscosities of the
    copolymers ranged from 0.65 to 0.69 dL/g. The copolyesters with BHEPS of <10 mol% were
    crystallizable, whereas the copolyesters with BHEPS of P10 mol% were amorphous. Incorporating
    BHEPS affected the glass-transition temperature (Tg) values of those polymers,
    from about 81 C for PETS5 to 126 C for PETS95. The optical transmissions exceeded 86%
    for k = 400 nm for all of the amorphous polyesters. The tensile modulus and strength of
    the copolyesters increased with BHEPS. However, they also became brittle and their elongation
    at break decreased.
    關聯: EUROPEAN POLYMER JOURNAL45(1):115~122
    显示于类别:[中國醫學研究所] 期刊論文

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