Effect of network structure on the stress–strain behaviour of endlinked PDMS elastomers
Effect of network structure on the stress–strain behaviour of endlinked PDMS elastomers
复制标题
网络结构对端联PDMS弹性体应力应变行为的影响
DOI：
10.1016/j.polymer.2010.01.067
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发表时间：
2010
期刊：
影响因子：
4.6
通讯作者：
C. Cohen
中科院分区：
文献类型：
--
作者：
S. H. Yoo;Leslie Yee;C. Cohen
以不同体积分数的非反应链为溶剂，合成了具有不同摩尔质量的端联聚二甲基硅氧烷(PDMS)网络。对这些网络进行了单轴拉伸和压缩测量，以研究它们的应力-应变行为。通过控制网络合成过程中的交联度和缠结程度，考察了网络结构和溶剂对应力-应变行为的影响。Rubinstein和Panyukov非仿射滑移管(NAST)模型的主曲线提供了对大多数拉伸和压缩数据的适当拟合。此外，Nast模型(Gcand Ge)的交联键和纠缠参数与Mooney-Rivlin连续介质模型的2C1值和2C2值基本一致。对于高摩尔质量的前驱体链，纠缠对模数的贡献超过了交联链的贡献。
Endlinked poly(dimethylsiloxane) (PDMS) networks synthesized from telechelic precursor chains of different molar mass were prepared with varying volume fractions of non-reactive chains acting as solvent. Uniaxial extension and compression measurements were performed on these networks to investigate their stress–strain behaviour. The effect of the network structure and of solvent on the stress–strain behaviour is examined by controlling the extent of crosslinks and entanglements during the network synthesis. The master curve of the Rubinstein and Panyukov non-affine slip-tube (NAST) model provide an adequate fit to most of the extension and compression data. Furthermore, the crosslink and entanglement parameters of the NAST model (Gcand Ge) are found to be in general in reasonable agreement with the 2C1and 2C2parameters of the Mooney–Rivlin continuum model applied to the extension data. For high molar mass precursor chains, the entanglement contribution to the modulus surpasses the crosslink contribution.