作　　者： ;

机构地区： 华南理工大学

出　　处： 《合成橡胶工业》 1995年第3期171-173,共3页

摘　　要： 研究了聚合物熔体经短口型挤出时的胀大行为及机理,并应用形变流体微元分析方法,导出了短口型挤出胀大方程,即B=[1+1.5(L_e/D_c)(△P_0/τ_w)(n+1)tan^2α_0]^(0.5).同时,引用文献发表的混炼胶毛细管挤出实测值对该方程的简化式B=[1+1.5(△P_0/τ_w)(n+1)tanα_0]^(0.5)进行了初步验证.结果表明,理论预测值与实测值有较好的一致性. The extrusion swell behavior and mechanism for polymer melts from short dies were studied. An extrudate swell equation of short dies was derived by the analysis method of deformational fluid element :B = [ 1 + 1.5(Le/Dc)(ΔP0/τW(n+ 1 ) × tan2α0] 0.5. The equation was preliminarily verified by the experimental data for rubber compounds in capillary extrusion puhilished in literature. Good agreement was shown between the theoretical prediction values of die swell ratio B and the measured values from the samples.

关 键 词： 天然橡胶 挤出 膨胀 方程 橡胶 成型

领　　域： [化学工程]