End-Linked Poly(dimethylsiloxane) Elastomer Structure: 2H-NMR Transverse Dephasing Data Compared to Predictions of Statistical and Thermodynamic Models
End-Linked Poly(dimethylsiloxane) Elastomer Structure: 2H-NMR Transverse Dephasing Data Compared to Predictions of Statistical and Thermodynamic Models
复制标题
末端连接的聚（二甲基硅氧烷）弹性体结构：2H-NMR 横向失相数据与统计和热力学模型预测的比较
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
C. Cohen
中科院分区：
文献类型：
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作者：
K. McLoughlin;C. Szeto;T. Duncan;C. Cohen
介绍了具有系统变化的弹性和膨胀性能的氘化聚二甲基硅氧烷[PDMS(d)]弹性体的2H-NMR测量。将2H-NMR横向脱相数据与描述弹性体氘横向脱相数据为弹性链和垂链贡献的线性叠加的模型的预测进行了比较。从2H-NMR横向脱相模型中获得的结构参数与使用统计和热力学模型从膨胀测量中推断的结构参数进行了比较。根据横向减相数据模型的预测，弹性链的减相时间常数与膨胀测量得到的弹性链的数平均分子量成正比。
2H-NMR measurements of deuterated poly(dimethylsiloxane) [PDMS(d)] elastomers with systematically varied elastic and swelling properties are presented. 2H-NMR transverse dephasing data are compared to the predictions of a model describing elastomer deuterium transverse dephasing data as a linear superposition of contributions from elastic and pendant chains. Structural parameters obtained from the model for 2H-NMR transverse dephasing are compared to structural parameters inferred from swelling measurements using statistical and thermodynamic models. As predicted by the model for transverse dephasing data, dephasing time constants for elastic chains are directly proportional to number-average molecular weights of elastic chains obtained from swelling measurements.