混沌螺杆混沌混合性能模拟与实验  

Simulation and Experiment of Chaotic Mixing Properties for Chaos Screw

作　　者：杜遥雪[1] 石绍伟[1] 杜思莹 徐百平[1] Du Yaoxue;Shi Shaowei;Du Siying;Xu Baiping(School of Mechanical and Electrical Engineering, Wuyi University, Jiangmen 529020, China)

机构地区：[1]五邑大学机电工程学院

出　　处：《塑料科技》2019年第6期86-89,共4页Plastics Science and Technology

基　　金：广东省自然科学基金项目(2016A030313004)

摘　　要：针对混沌螺杆的混沌单元,对其加工高分子材料的混合性能进行模拟并与螺杆单元比较,采用PP/ABS共混物进行力学性能与微观形态实验。结果表明:混沌单元的停留时间概率密度曲线峰宽,拉伸长度对数曲线斜率增大,对物料拉伸折叠作用强,有利于提高共混物的混合性能;随着混沌螺杆转速的增加,PP/ABS共混物的冲击强度和拉伸强度先下降后上升;混沌单元的周期性间断多副螺棱具有很好的混沌混合特征,物料开始进入混沌单元时分散相被迅速分离,分散相粒径减小有一个相对缓慢期,随后分散相又被迅速分离,使得分散相粒径不断减小,提高了PP/ABS共混物的混合效果。Aiming at the chaotic unit of chaotic screw, the mixing properties of polymer materials processed by chaotic screw unit were simulated and compared with screw unit. The mechanical properties and micro-morphology of PP/ABS blends were tested. The results show that the peak width of residence time probability density curve of chaotic unit and the slope of logarithmic curve of stretching length increase greatly. It has strong stretching and folding effect on materials and is beneficial to improve the mixing properties of blends. The impact toughness and tensile strength of PP/ABS blends decrease first and then increase with the increase of the rotational speed of chaotic screw. The periodic discontinuous multiple screw edges of the chaotic unit have good chaotic mixing characteristics. When the material enters the chaotic unit, the dispersed phase is separated rapidly. The particle size of the dispersed phase decreases at a relatively slow stage, and then the dispersed phase is separated rapidly, which makes the particle size of the dispersed phase decrease continuously and improves the mixing effect of PP/ABS blends.

关 键 词：混沌螺杆 混沌混合 混沌单元 螺杆单元 力学性能 微观形态 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]