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首页> 外文期刊>Journal of Applied Polymer Science >Thermal behavior and tensile properties of poly(ethylene terephthalate-co-ethylene isophthalate)
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Thermal behavior and tensile properties of poly(ethylene terephthalate-co-ethylene isophthalate)

机译：聚对苯二甲酸乙二醇酯-间苯二甲酸乙二醇酯的热行为和拉伸性能

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摘要

Poly(ethylene terephthalate) (PET) and poly(ethylene isophthalate) (PEI) homopolymers were synthesized by the two-step melt polycondensation process of ethylene glycol (EG) with dimethyl terephthalate (DMT) and/or dimethyl isophthalate (DMI), respectively. Nine copolymers of the above three monomers were also synthesized by varying the mole percent of DMI with respect to DMT in the initial monomer feed. The thermal behavior was investigated over the entire range of copolymer composition by differential scanning calorimetry (DSC). The glass transition (T-g), cold crystallization (T-cc), melting (T-m), and crystallization (T-c) temperatures have been determined. Also, the gradually increasing proportion of ethyleno-isophthalate units in the virgin PET drastically differentiated the tensile mechanical properties, which were determined, and the results are discussed. (C) 2000 John Wiley & Sons, Inc. [References: 12]
机译：分别通过乙二醇（EG）与对苯二甲酸二甲酯（DMT）和/或间苯二甲酸二甲酯（DMI）的两步熔融缩聚工艺合成聚对苯二甲酸乙二醇酯（PET）和聚对苯二甲酸乙二醇酯（PEI）均聚物。 。通过改变初始单体进料中DMI相对于DMT的摩尔百分比，还合成了上述三种单体的九种共聚物。通过差示扫描量热法（DSC）研究了在共聚物组成的整个范围内的热行为。确定了玻璃化转变温度（T-g），冷结晶温度（T-cc），熔融温度（T-m）和结晶温度（T-c）。另外，在原始PET中，间苯二甲酸乙二酯单元的比例逐渐增加，这极大地确定了拉伸机械性能，并对此进行了讨论。 （C）2000 John Wiley＆Sons，Inc. [参考：12]

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