采用旋转流变仪研究了三种不同粒径的聚丙烯酸酯微球在增塑剂邻苯二甲酸二异壬酯（DINP）中的流变性能和凝胶固化行为,并用原子力显微镜和透射电子显微镜表征了聚合物粒子的表面形貌和大小。流变测试结果表明,聚合物微球粒子尺寸越大,与DINP混合后体系黏度越小;并且混合体系随剪切速率增大黏度减小,呈假塑性流体行为;混合流体测定温度越高,体系黏度越小;增加聚合物所占的比例,体系黏度上升。振荡温度扫描显示,聚合物含量增加会使混合体系凝胶固化温度降低。
The rotational rheometer was used to investigate the rheological properties and gel curing behaviors of polyacrylate microsphares with different size in plasticizer 1,2-benzenedicarboxylic acid,diisononyl ester（DINP）.Atomic force microscopy（AFM） and TEM were used to observe the morphology and sizes of these polymeric microspheres.Results of the rheological test suggest that with the size increasing,polymeric microspheres present a smaller viscosity in the mixture system.Additionally,the mixture fluid shows a pseudoplastic behavior in the process of shear rate accelerating.At the same time,when the temperature rises up or the proportion of polymer is dropping down,the viscosity of the mixture system decreases.Furthermore,the dynamic test indicates that higher proportion of the polymer could lower the gel curing temperature.
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