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首页> 外文期刊>Journal of Applied Polymer Science >Solid-state C-13-NMR investigations of crosslinked structure modifications in elastomers during heating treatment
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Solid-state C-13-NMR investigations of crosslinked structure modifications in elastomers during heating treatment

机译:加热处理过程中弹性体中交联结构改性的固态C-13-NMR研究

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The chemical modifications occurring during the thermal degradation of sulfur-cured natural rubber were investigated with C-13-NMR. Samples of vulcanized rubbers were heat-aged at 70degreesC under an air (oxidative) environment for 3, 7, and 21 days. Changes were analyzed by the measurement of the variations of the concentrations of different C-S-x-C crosslinked structures during the thermooxidative process through the intensity of the related NMR lines in the 10-70-ppm range. (C) 2002 Wiley Periodicals, Inc. [References: 5]
机译:用C-13-NMR研究了在硫固化天然橡胶的热降解过程中发生的化学修饰。 硫化橡胶样品在7,7和21天的空气(氧化)环境下在70degreesc中加热。 通过在10-70-ppm范围内的相关NMR线的强度测量热氧化过程中不同的C-S-C-C交联结构的浓度的变化来分析变化。 (c)2002 Wiley期刊,Inc。[参考文献:5]

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