Determination of particle size in multiphase blends by different methods
作者:
Petra Pötschke,
Katrin Wallheinke,
Andreas Janke,
Cornelia Bellmann,
Herbert Stutz,
Walter Heckmann,
期刊:
Journal of Macromolecular Science, Part B
(Taylor Available online 1999)
卷期:
Volume 38,
issue 5-6
页码: 527-539
ISSN:0022-2348
年代: 1999
DOI:10.1080/00222349908248118
出版商: Taylor & Francis Group
关键词: AFM;Light microscopy;Light scattering;Morphology;Particle size;Polymer blends;SEM;TEM.
数据来源: Taylor
摘要:
Different methods for characterizing the morphology of multiphase blends were applied to a blend of thermoplastic polyurethane with 20 wt% polypropylene as the dispersed phase. Optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), and light scattering were compared. The microscopy methods were evaluated with respect to their suitability for quantitative image analysis for determination of the particle size distribution. Comparison of the particle size distributions revealed that the dependence of the measured particle size on the method of preparation and technique was not very pronounced. The main difference resulted from cutting the particles outside their maximum diameter. The measured particle sizes determined with methods that analyze the whole particles, such as SEM on separated particles and laser light scattering, are larger than those measured on cut specimens. The factor 4/π valid in monodisperse systems for the ratio between the real particle size and that measured on sections was found also to be applicable to this polydisperse blend system. Although light micros-copy requires the least preparation efforts, it is a reliable method for this blend system.
点击下载:
PDF (750KB)
返 回