Characterization of nonideal networks by stress-strain measurements at large extensions
Characterization of nonideal networks by stress-strain measurements at large extensions
复制标题
通过大延伸处的应力应变测量表征非理想网络
DOI：
10.1002/app.1993.070480702
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发表时间：
1993
影响因子：
3
通讯作者：
M. Klüppel
中科院分区：
文献类型：
--
作者：
M. Klüppel
它示出了如何从单轴应力-应变测量数据的表征，无定形橡胶网络可以进行评估。除了交联密度，固化过程中的相对断裂概率进行评估，这决定了悬挂的自由链端的量和捕获的缠结的数量。这些值是通过使用管模型的预测从Mooney-Rivlin方程的C2项找到的。在大延伸时应用应力-应变测量的一个必要要求是考虑减小应力的有限延伸分量。它是考虑到通过使用数值计算的过程中，它来自一系列的逆朗之万近似展开。对用秋兰姆（TMTD）和过氧化物（DCP）交联的天然橡胶网络的实验结果表明，在DCP网络中，网络缺陷是不可忽略的。它们被认为是连接到更差的拉伸强度性能相比，TMTD网络。© 1993约翰威利父子公司。
It is shown how a characterization of unfilled, amorphous rubber networks can be evaluated from uniaxial stress-strain measurement data. Beside the cross-linking density, the relative scission probability during the curing procedure is evaluated, which determines the amount of dangling free chain ends and the number of trapped entanglements. These values are found from the C2 term of the Mooney-Rivlin equation by using the predictions of a tube model. A necessary requirement for applying stress-strain measurements at large extensions is the consideration of the finite extensibility component of the reduced stress. It is taken into account by using a numerical procedure, which derives from a series expansion of the inverse Langevin approximation. The experimental results found at natural rubber networks cross-linked with thiuram (TMTD) and peroxid (DCP) show that network defects cannot be neglected in the DCP networks. They are assumed to be connected to the worse tensil strength properties compared to the TMTD networks. © 1993 John Wiley & Sons, Inc.