摘要
根据环氧树脂流变性能实验结果,经过严格的数学推导,提出了一种新的未固化环氧树脂的本构模型。它与以前的经验模型不同,每一项、每一个参数都具有较明确的物理意义,简单、明了地说明了环氧树脂的粘弹性本质。此方程说明材料的屈服应力是剪切变稀行为的一个主要原因。它揭示了某些材料存在的双牛顿区现象,并证明第一牛顿区的剪切黏度大于第二牛顿区的。但此方程仅是一维模型,其精确度和适应范围有待进一步研究。
Based on rheologic test results, a new epoxy resin constitutive equation was proposed with mathematical justification. Every term and every coefficient in it have physical meaning, which clarifies the essence of viscoelasticity of resin materials. The proposed model indicates that the yield stress is one of the main causes for the shear-thinning effect and reveals why some materials possess double-Newtonian regions with the shear viscosity in the first region higher than that in the second region. The equation is of great value in research on the rheological properties of some polymers and the error analyses of some constitutive equations.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2006年第5期32-35,共4页
Polymer Materials Science & Engineering
关键词
环氧树脂
非线性
本构方程
流变
剪切黏度
epoxy resin
non-linear
constitutive
theologic
shear viscosity
