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首页> 外文期刊>Journal of coatings technology and research >Steady rheological behaviors of UV-curable waterborne hyperbranched polyurethane acrylate dispersions
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Steady rheological behaviors of UV-curable waterborne hyperbranched polyurethane acrylate dispersions

机译：紫外光固化水性超支化聚氨酯丙烯酸酯分散体的稳态流变行为

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摘要

A rotational rheometer was used to investigate the steady rheological behaviors of UV-curable waterborne hyperbranched polyurethane acrylate dispersions (WHBPUADs). The flow curves of WHBPU-ADs were fitted mathematically using the Cross model. The effects of many factors including solid content, concentration of hydrophilic groups, and degree of neutralization on the rheological behaviors were studied and discussed. It was found that the viscosity of WHBPUAD decreased with increasing shear rate, indicating that WHBPUAD was pseudoplastic. On the other hand, at the same shear rate, the viscosity of WHBPUAD increased with increasing solid content and degree of neutralization but decreased with increasing concentration of hydrophilic groups. The Cross model could describe the flow curve of WHBPUAD accurately, with square of correlation coefficient (R~2) above 0.9. Moreover, most of the zero-shear viscosity values (η_0) obtained by the Cross model were located in the range of 0.2-10 Pa·s, which could fully meet the practical application requirement.
机译：旋转流变仪用于研究紫外线固化的水性超支化聚氨酯丙烯酸酯分散体（WHBPUADs）的稳定流变行为。使用Cross模型对WHBPU-AD的流量曲线进行数学拟合。研究并讨论了固含量，亲水基团浓度和中和度等多种因素对流变行为的影响。发现WHBPUAD的粘度随剪切速率的增加而降低，表明WHBPUAD是假塑性的。另一方面，在相同的剪切速率下，WHBPUAD的粘度随固含量和中和度的增加而增加，但随亲水基团浓度的增加而降低。 Cross模型可以准确地描述WHBPUAD的流量曲线，相关系数的平方（R〜2）大于0.9。而且，由Cross模型获得的零剪切粘度值（η_0）大多在0.2-10 Pa·s的范围内，完全可以满足实际应用的要求。

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    Wenhua Yin; Xingrong Zeng; Hongqiang Li; Xiaodan Lin; Biyc Ren; Zhen Tong;

  • 作者单位

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;

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  • 正文语种 eng
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  • 关键词

    hyperbranched; waterborne polyurethane acrylate; rheological behavior; cross model;

    机译：超支化水性聚氨酯丙烯酸酯;流变行为交叉模型;

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