Abstract

The anelasticity regions in elastic latex polymers are established by using dynamic mechanical analysis for both filler-free samples and samples filled with iron and zinc powders. Internal friction spectra show that the α-relaxation process is less intensive in the filled polymers, and the peak corresponding to the glass transition temperature shifts into the region of positive temperatures. In the case of iron powder, we establish the presence of the β-relaxation process related to the segmental mobility of macrochains in elastic polymers. For the highly elastic polymer, the β-relaxation process is found even in the filler-free system, while in the filled system it is shifted into the range of positive temperatures. The internal friction spectra correlate with the variations of frequency with temperature that are used to establish anelasticity regions, suggesting that filling results in the narrowing of this region. This effect is due to the breaking of intermolecular bonds within the polymer and the formation of new relaxation structures in the presence of fillers. At negative temperatures, the spectra feature μ-relaxation processes, which are more pronounced in the filled systems and are consequent to the formation of different forms of ice upon freezing the latex polymer.

中文翻译：

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金属填料对弹性体弛豫过程的影响

摘要

弹性乳胶聚合物中的无弹性区域是通过对不含填料的样品以及填充有铁和锌粉的样品进行动态力学分析而建立的。内摩擦谱表明，在填充的聚合物中，α-松弛过程的强度较低，并且对应于玻璃化转变温度的峰移至正温度区域。在铁粉的情况下，我们建立了与弹性聚合物中大链的节段迁移率有关的β-松弛过程的存在。对于高弹性聚合物，甚至在无填料体系中也发现了β松弛过程，而在填充体系中，β松弛过程转移到正温度范围内。内部摩擦谱与用于建立非弹性区域的频率随温度的变化相关，这表明填充导致该区域变窄。该效果是由于在聚合物存在下，聚合物内分子间键的断裂和新松弛结构的形成。在负温度下，光谱具有μ松弛过程，该过程在填充的系统中更加明显，并因此导致在冻结胶乳聚合物时形成不同形式的冰。