松弛时间谱

聚苯乙烯松弛时间谱的计算研究

Study of discrete relaxation time spectrum of PS melts

基于聚合物熔体储能模量和耗能模量，给出了采用最小二乘线性回归得到熔体松弛时间谱的计算方法。

Based on the data of storage and loss moduli the calculation method of the relaxation time spectrum is attained by use of the least square linear regression .

分析了一种Boger流体的松弛时间谱和该流体的粘弹性表征问题。

The relaxation spectra and description of the viscoelastic Boger fluid were analyzed .

本文采用流变学方法从剪切流变和拉伸流变两方面，通过对剪切粘度、储能模量和损耗模量、松弛时间谱和拉伸粘度的表征，对四种具有不同分子结构PET的熔体强度进行分析。

In this work , the melt strength and viscoelasticity of four types of PET was analyzed through characterization of shear rheology and extensional rheology of PETs , including the dynamic complex viscosity , storage and loss modulus , relaxation spectrum , and extensional viscosity .

通过广义的Maxwell模型，研究其松弛时间谱与滚动摩阻的关系，得出了轮胎滚阻系数与松弛时间谱的计算关系并讨论了滚轮前进速度对滚动摩阻系数的影响。

Introducing the generalized Maxwell model and corresponding the relax time spectrum lead to the calculating relation of the tire rolling coefficient and relax time spectrum , and the influence of velocity on coefficient of rolling friction is discussed .

橡胶材料松弛时间谱与滚动摩阻的关系

Relation of Relax Time Spectrum and Rolling Friction About Rubber Material

橡胶材料的微观结构是其松弛时间谱的内在因素。

The microstructure of rubber material is an intrinsic factor of the relax time spectrum .

将动态频率扫描实验的储能模量和耗能模量数据，用线性、正则、非线性最小二乘法拟合材料的离散松弛时间谱。

The discrete relaxation time spectrum is calculated from the store modulus and the loss modulus which are got from the dynamic frequency test .

综合我们的研究结果，可从一个固定频率下的动态力学温度谱求得聚合物的松弛时间谱及其它粘弹函数。

The combination of previous and present papers has established the theory and method for working out relaxation and retardation spectra and other viscoelastic functions from dynamic mechanical temperature spectrum at a constant frequency .

这些新时间谱比前文报道的含3个松弛时间的谱能更好地描述该流体的储能模量G′。

These new spectra show better capabilities in describing the storage modulus G ' of the fluid than that of the spectrum with only three relaxation periods reported in the previous paper .

从静态应力松弛实验求材料准松弛时间谱的一种数值计算方法

A data-operation method of evaluating the relaxation time spectrum from the conventional stress-relaxation test