摘要
结合串联式磨盘螺杆挤出机的开发研究实践,对其核心部件——非阿基米德螺旋线磨盘流道中非牛顿流体的三维流动进行了模拟计算,分析了磨盘结构参数、工艺条件对流场的速度、压力和粘度分布的影响。研究结果可为该类机型的推广应用和系列开发提供理论依据。
In this paper, based on the development practicing of series disc-screw extruder and investigating the melting, mixing and flow mechanisms of the equipment, the three-dimensional models of divergent and convergent flow of non-Newtonian fluid in non-Archimedes spiral discs(the core components in the equipment) were built. The distributions of the velocity, pressure and viscosity in the gap between revolving and stationary disc have been acquired by applying commercial finite element analysis software-ANSYS. Meantime, the effects of disc configuration parameters and operational conditions on the flow field have been analyzed. The results can provide theoretical basis for application and serial development of this type of equipment.Keywords:series disc-screw extruder; disc; flow field simulation; kneadingPPAGESSADVANCES IN THE BIODEGRADABLE POLYMER- LAYERED SILICATE NANOCOMPOSITESRen Jie, Liao Wen-jun (Institute of Nano and Bio-Polymeric Materials, Tongji University, Shanghai 200092, China)ABSTRACT:The research on the preparation, characterization, materials properties, biodegradability, and application of biodegradable polymer/organically modified layered silicate (OMLS) nanocomposites was reviewed. The mechanical properties, thermal stability, heat distortion temperature, gas barrier property and biodegradability of neat biodegradable polymer is significantly enhanced after nanocomposites preparation with layered silicate. The melt rheology of biodegradable nanocomposites was also studied. These nanocomposites display the rheology of shear-thinning, increased moduli, and solidlike etc. In the preparation of nanocomposites, organoclay plays an important role in dispersing the clay into less polar polymer matrixes. The compatibilizer in nanocomposites was also investigated in the aspect of morphological analysis. A new idea for obtaining porous ceramic material from these biodegradable nanocomposites by burning is unveiled using various clays. In this paper, the advances of biodegradable polymer-layered sil
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第3期35-39,共5页
Polymer Materials Science & Engineering
基金
高等学校博士学科点专项科研基金项目(20010010002)
教育部科技重点项目(02016)
关键词
串联式磨盘螺杆挤出机
磨盘
流场模拟
混炼
nanocomposites
layered silicate
biodegradability
mechanical properties
gas barrier property
