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首页> 外文期刊>Journal of Applied Polymer Science >Characterizing gum natural rubber samples through advanced techniques
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Characterizing gum natural rubber samples through advanced techniques

机译：通过先进技术表征天然橡胶胶样品

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Owing to its origin, Natural Rubber exhibits more variation than synthetic polymers. If, over the years, NR specifications have evolved from mere visual inspections towards the more complex Technically Specified Rubber (TSR) schema, industrial practice shows that, even for typical TSR grades, significant variations still exist within each shipment, especially in regard to processability. It follows that mastication is quite systematically needed in industrial operations, without or with processing aids or so-called peptizers. Typical NR compounding operations consume therefore time and mixer capacity, a situation, which obviously calls both better characterization methods of (gum) natural rubber and eventually improved grades. There are nowadays promising new techniques to analyze and characterize polymer materials, some of which are a priori attractive for a better specification of NR grades. One such technique is the so-called Fourier Transform rheometry, a dynamic testing method to investigate both the linear and the non-linear viscoelastic domains of polymer materials. Other are spectroscopic methods like solid Nuclear Magnetic Resonance (NMR), either liquid or solid, whose results might be complemented by Size Exclusion Chromatography with special detection techniques, e.g. SEC-MALS, and Differential Scanning Calorimetry (DSC). The purpose of the work reported here was to investigate a series of gum NR grades using such techniques, with the objectives not only to demonstrate their interest but also to cross-validate their results.
机译：由于其起源，天然橡胶表现出比合成聚合物更多的变化。多年来，如果NR规范已从单纯的目视检查发展为更复杂的技术规范橡胶（TSR）方案，则工业实践表明，即使对于典型的TSR等级，每批货物中仍存在显着差异，尤其是在可加工性方面。因此，在没有或没有加工助剂或所谓的胶溶剂的情况下，在工业操作中非常系统地需要咀嚼。因此，典型的NR配混操作会消耗时间和混合机容量，这种情况显然需要更好的表征（口香糖）天然橡胶的方法以及最终提高其牌号。如今，有很多有希望的新技术可以用来分析和表征聚合物材料，其中一些对于提高NR级规格具有先验的吸引力。一种这样的技术是所谓的傅里叶变换流变法，这是一种动态测试方法，用于研究聚合物材料的线性和非线性粘弹性域。其他的是光谱方法，例如液体或固体的固体核磁共振（NMR），其结果可能会通过尺寸排阻色谱法和特殊的检测技术来补充，例如SEC-MALS和差示扫描量热法（DSC）。本文报道的工作目的是研究使用此类技术的一系列NR级口香糖，目的不仅在于展示其兴趣，而且还可以交叉验证其结果。

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