首页> 外文会议>Society of Plastics Engnieers annual technical conference >MORPHOLOGICAL CHARACTERIZATION OF MECHANICALLY ALLOYED PET/VECTRA BLENDS BY X-RAY MICROSCOPY
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MORPHOLOGICAL CHARACTERIZATION OF MECHANICALLY ALLOYED PET/VECTRA BLENDS BY X-RAY MICROSCOPY

机译:通过X射线显微镜机械合金化PET / Vectra共混物的形态学特征

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High-energy mechanical milling constitutes a novel means by which to produce intimate mixtures of immiscible polymers. In the present work, this technique has been employed to blend poly(ethylene terephthalate) (PET) and a thermotropic copolyester (Vectra). Morphological characterization by conventional transmission electron microscopy (TEM) is confounded due to the absence of a preferential stain to enhance phase contrast. Based on Near Edge X-ray Absorption Fine Structure spectroscopy, x-ray microscopy is sensitive to the chemistry and orientation of functional groups and can be used to discriminate between PET and Vectra. X-ray micrographs reveal that PET-rich blends exhibit Vectra-rich domains ranging from 0.10 to 20 μm in diameter. X-ray microscopy is also utilized here to determine the molecular orientation within the Vectra-rich domains.
机译:高能量机械研磨构成一种新颖的方法,由此产生一种不混溶的聚合物的紧密混合物。在本作工作中,该技术已经用于混合聚(乙二醇酯)(PET)和热致丙二醇共聚酯(Vectra)。由于不存在优先染色以增强相位对比度,通过常规透射电子显微镜(TEM)的形态学表征被混淆。基于近边缘X射线吸收细结构光谱,X射线显微镜对功能组的化学和取向敏感,可用于区分PET和Vectra。 X射线显微照片揭示了富宠物的共混物表现出直径0.10至20μm的Vectra的富座。此处还用于X射线显微镜检查以确定富焦域内的分子取向。

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