THE ULTIMATE PROPERTIES OF SIMPLE ELASTOMERS
THE ULTIMATE PROPERTIES OF SIMPLE ELASTOMERS
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DOI：
10.1002/pol.1956.120199204
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发表时间：
1956-01-01
影响因子：
3.4
通讯作者：
BUECHE, AM
中科院分区：
文献类型：
--
作者：
BUECHE, AM
假定了简单弹性体破裂的判据，并对其后果进行了检验。该准则假定，当进一步伸长引起的张力增加速率等于粘结断裂引起的张力减少速率时，试样将断裂。前者是根据应变速率和应力-应变曲线的形式计算的。后者的表达式是用反应速率考虑得到的。所得表达式代表了在实验误差范围内聚二甲基硅氧烷断裂的实验数据。利用该理论，在一个温度下由拉伸数据得到的键断裂激活自由能与在几个温度下由应力松弛测量得到的激活能大致一致。
A criterion for the rupture of simple elastomers is postulated and its consequences examined. The criterion assumes that the sample will break when the rate of increase of tension due to further elongation is equal to the decrease due to bond rupture. The former is computed from the rate of strain and the form of the stress‐strain curve. An expression for the latter is found using reaction rate considerations. The resulting expression represent the experimental data on the rupture of polydimethylsiloxanes within the limits of experimental error. The free energy of activation for bond rupture obtained from the tensile data, by use of the theory, at one temperature is in approximate agreement with the activation energy obtained from stress relaxation measurements at several temperatures.