作 者: ;
机构地区: 华南理工大学机械与汽车工程学院
出 处: 《弹性体》 1996年第1期39-42,共4页
摘 要: 应用Monsanto加工性能试验机,考察了天然胶/顺丁胶胶料在毛细管挤出过程中的壁滑移速度及其影响因素。发现,在较低的剪切速率下,试样的流动曲线出现不连续;壁滑移速度与壁面剪切应力之间大体上呈指数函数关系;发生壁滑移时的临界剪切应力随着温度的升高而下降。 The wall - slip velocity in capillary extrusion of natural rubber(NR)/cis - polybutadiene(CPB)compound was investigated by use of Monsanto processabili ty tester (MPT). It was foundthat the flow curves of the sample emerged discontinuty in a range of low shear rates; an indexfunction relationship between the wall-slip velocity and the wall shear stress was shown appro ximately;the critical shear stress of onset of the wall-slip was decreased with a rise of temperature.
领 域: [化学工程]