Morphology and mechanical properties of blends of thermoplastic polyurethane and polyolefins

被引：0
|
作者：
Di, Yali [1 ]
Kang, Maoqing [1 ]
Zhao, Yuhua [1 ]
Yan, Shirun [2 ]
Wang, Xinkui [1 ]
机构：
[1] State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, China
[2] Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, China
来源：
Journal of Applied Polymer Science | 1600年 / 99卷 / 03期
关键词：
Polyolefins (PO) were melt mixed with thermoplastic polyurethane (TPU) in a 20 : 80 weight ratio with or without compatibilizer containing 0.5 wt % of maleic anhydride. Effects of component viscosities on morphology and on mechanical properties of the blend were studied by scanning electron microscope (SEM); tensile property analysis; and dynamic mechanical analysis (DMA). It was found that the disperse particle size of compatibilizer-free blends decreased with the decreasing viscosity ratio of the disperse phase to TPU. The efficiency of the compatibilizer in reducing the particle size varied with viscosity ratios of the disperse phase to compatibilizer. However; the particle size did not decrease with the decreasing viscosity ratio monotoni cally. With lower viscosity ratio; addition of 5 wt % compatibilizer resulted in a greater reduction of particle size and less loss in the tensile properties as compared to the TPU matrix. For the polyethene (PE) that has the lowest viscosity value among all the POs; its size in the blend was stabilized with the addition of compatibilizer and no compatibilization was detected by DMA and by tensile property analysis. The mobility of the disperse phase and compatibilizer and the dispersion competition between them seemed important. © 2005 Wiley Periodicals; Inc;
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摘要：
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页码：875 / 883
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