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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical properties of native and crosslinked gelatins in a bending deformation
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Mechanical properties of native and crosslinked gelatins in a bending deformation

机译：天然和交联明胶在弯曲变形中的机械性能

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摘要

Gelatin samples, native and chemically crosslinked with three different diisocyanates, were studied by bending-creep measurements. These samples were characterized by the number-average molecular weight of a chain segment between two points of crosslinkage M-c. The chemical network was found to contribute to a marked extent to the mechanical behavior of the samples. The dependence of the creep compliance on the time for different loads was determined. The experimental results were compared with calculated ones according to a model, comprising four parameters, to obtain a better understanding of structure-property relationships for these materials. A very good agreement between the model and experimental data was found. Two of the fitting parameters, however-the relaxation time and eta (which is connected with the viscosity)-were found to strongly depend on the time of the experiment. (C) 2000 John Wiley & Sons, Inc. [References: 11]
机译：通过弯曲蠕变测量研究了用三种不同的二异氰酸酯进行天然交联和化学交联的明胶样品。这些样品的特征在于交联点M-c的两个点之间的链段的数均分子量。发现化学网络在很大程度上有助于样品的机械性能。确定了不同载荷下蠕变柔度对时间的依赖性。根据包含四个参数的模型，将实验结果与计算结果进行了比较，以更好地理解这些材料的结构-特性关系。在模型和实验数据之间找到了很好的一致性。但是，发现两个拟合参数-弛豫时间和eta（与粘度有关）在很大程度上取决于实验时间。 （C）2000 John Wiley＆Sons，Inc. [参考：11]

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