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应用差示扫描量热法(DSC),研究了含有间苯二甲酸乙二酯(EI)的共聚酯(PEIT)的非等温结晶动力学,得到了不同间苯含量(A_1相似文献
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Crystallization behavior of poly(ethylene terephthalate-co-ethylene isophthalate)(PEIT) with different isoph-thalate contents (4%, 8% and 12%, designated asPEIT4,PEIT8 and PEIT12 respectively) has been inves-tigated by DSC and density measurement methods. Theresults show that the crystailinity of PEIT decreases withincreasing isophthalate content. However the crystallinity of PEIT8 is much smaller than that of PEIT12 whencooling from melt at a constant rate.The crystailinity ofPEIT8 cold-drawn filament shows almost the same val- 相似文献
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The shrinkage behavior of copoiyester fibers (PEIT) and the ' latent - crimp behavior of side - by - side PET/ PEIT composite fibers have been studied. It is shown that the shrinkage rate, the crimp ratio and the crimp rigidity of these fibers increase with the increasing isoph-thalate content of PEIT and the treatment temperature. The shrinkage in boiling water of the cold - drawn PEIT - A2 fiber appears to be higher than that of PEIT - A3. The shrinkage in dry air of the cold - drawn PEIT - A2 fiber is also higher than that of PEIT at temperature of 393 K or 413K, but lower at 453K. The crimp rigidity of the PET/PEIT - A: conjugate fiber appears to be obviously higher than that of the PET/PEIT - A, conjugate fiber. The mechanism of the shrinkage behavior related these fibers are discussed in detail. 相似文献
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