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首页> 外文期刊>Journal of Applied Polymer Science >Comparison of the viscous and elastic components of two ABS materials with creep, stress relaxation and constant strain rate measurements using the universal viscoelastic model
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Comparison of the viscous and elastic components of two ABS materials with creep, stress relaxation and constant strain rate measurements using the universal viscoelastic model

机译：使用通用粘弹性模型比较两种ABS材料的黏性和弹性成分，并进行蠕变，应力松弛和恒定应变率测量

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In general, the universal viscoelastic model evaluated in this study was found to adequately predict constant strain rate, creep, and/or stress relaxation measurements from the constants determined from constant strain rate measurements. The elastic and viscous components for two acrylonitrile-butadiene-styrene (ABS) viscoelastic materials were also easily isolated using this new universal viscoelastic model. The creep measurements for ABS-A (25383-A) and ABS-N (LL-4102-N) at three different stresses allowed elucidation of the common creep intercept strain of the calculated creep slopes that was designated as the "projected elastic limit." Once the values for n and beta were evaluated from creep measurements, then the creep variation of the universal viscoelastic model yielded a reasonably good fit of the measured creep data for both ABS-A and ABS-N. The extensional viscosity constant lambda(E) was found to be 7.2% greater for ABS-A than for ABS-N. Consequently, ABS-N was found to have a lower extensional viscosity in secondary creep than that of ABS-A at any specific strain rate. The value of the efficiency of yield energy dissipation n for ABS-N as determined from creep measurements was also 37.6% larger than the value of n for ABS-A. In addition, the projected elastic limit epsilon(1) for ABS-A was 2% greater than the projected elastic limit for ABS-N. These observations indicated that ABS-A should be slightly more solidlike than ABS-N. However, both ABS-A and ABS-N were significantly more solidlike than liquidlike because both of their values for the efficiency of yield energy dissipation n were very close to zero. In general, values of n range from 0 < n < 1 with a material characterized as being essentially pure elastic having a value of n = 0. Using the yield strain as the failure condition for constant strain rate and stress relaxation measurements and the strain at critical creep, the failure condition for creep, it was found that the universal viscoelastic model allowed these failure criteria to yield remarkably good agreement on a projected time scale. This agreement resulted even though separate and independent data were used to evaluate these three different techniques for both ABS-A and ABS-N. (C) 2003 Wiley Periodicals, Inc. [References: 23]
机译：通常，在这项研究中评估的通用粘弹性模型可以根据恒定应变率测量值确定的常数来充分预测恒定应变率，蠕变和/或应力松弛测量值。使用这种新的通用粘弹性模型，还可以轻松地分离出两种丙烯腈-丁二烯-苯乙烯（ABS）粘弹性材料的弹性和粘稠成分。 ABS-A（25383-A）和ABS-N（LL-4102-N）在三个不同应力下的蠕变测量结果可以阐明计算出的蠕变斜率的共同蠕变截距应变，该应变被称为“投影弹性极限”。 ”一旦从蠕变测量值评估了n和beta值，那么通用粘弹性模型的蠕变变化就可以很好地拟合ABS-A和ABS-N的测量蠕变数据。发现ABS-A的拉伸粘度常数λ（E）比ABS-N大7.2％。因此，发现在任何特定应变速率下，ABS-N在二次蠕变中的拉伸粘度均低于ABS-A。由蠕变测量确定的ABS-N的屈服能量耗散效率n的值也比ABS-A的n值大37.6％。此外，ABS-A的预计弹性极限ε（1）比ABS-N的预计弹性极限大2％。这些观察结果表明，ABS-A应该比ABS-N更像固体。但是，ABS-A和ABS-N的固态性都比液态的强得多，因为它们的屈服能量耗散效率n值都非常接近零。通常，n值范围从0

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