摘要
在90～140℃、表现切变速率为50～1000s^(-1)的条件下,用Monsanto加工性能试验机对混炼胶的挤出流变行为进行了测试。结果表明,试样的挤出膨胀比(B)和入口压力降(△P_(ENT))随着料筒与口型直径比的增加而增大,△P_(ENT)与B大致呈线性关系:B=B_0+K△P_(ENT),其中,待定系数B_0和K与实验条件有关。进一步分析表明,B与第一法向应力差(N_1)亦大致呈线性关系。
The extrusion rheological behavior of rubber compound was investigated in the range of apparent shear rate 50-1000s-1 at 90- 140°C, by Monsanto processability tester . It was found that the die swell ratio (B) and the entrance pressure drop (ΔPENT) increased with increasing the diameter ratio (DR/D) of the reservoir to the die , and the relationship between ΔPENT and B wasbasically linear : B=B0 +KΔPENT, where the coefficients B0 and K were related to the experimental conditions , which characterized the elastic behavior of rubber compound during extrusion .
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1993年第2期110-112,共3页
China Synthetic Rubber Industry
关键词
混炼胶
粘弹性流体
挤出膨胀
橡胶
rubber compound
viscoelastic fluid
die swell
entrance pressure drop
extrusion
