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首页> 外文期刊>Polymers for advanced technologies >Thermoplastic elastomer based on epoxidized natural rubber/thermoplastic polyurethane blends: influence of blending technique
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Thermoplastic elastomer based on epoxidized natural rubber/thermoplastic polyurethane blends: influence of blending technique

机译：基于环氧化天然橡胶/热塑性聚氨酯共混物的热塑性弹性体：共混技术的影响

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摘要

Epoxidized natural rubber (ENR) and thermoplastic polyurethane (TPU) blends were prepared by simple blend and dynamic vulcanization. The main objective was to prepare a low-hardness TPU material with good damping and elastic and mechanical properties. It was found that the incorporation of ENR into the blend shows a reduction in Young's modulus, hardness (i.e. <70 Shore A), damping properties (i.e. tanδ< 0.3), and tension set (i.e. <20%) compared with the pure TPU. This indicates the formation of softer TPU materials with superior damping and elastomeric properties. However, incorporation of ENR sacrificed mechanical properties in terms of tensile strength and elongation at break, but these still remain in the range of applicability for industrial uses. It was also found that dynamic vulcanization caused enhancement of mechanical properties, relaxation, damping, rheological properties, and elasticity of the blends. Temperature scanning stress relaxation measurements revealed an improvement in stress relaxation properties and thermal resistance of the dynamically cured ENR/TPU blend.
机译：环氧天然橡胶（ENR）和热塑性聚氨酯（TPU）的混合物是通过简单的混合物和动态硫化制备的。主要目的是制备具有良好阻尼和弹性及机械性能的低硬度TPU材料。发现与纯TPU相比，将ENR掺入共混物中显示出杨氏模量，硬度（即<70 Shore A），阻尼特性（即tanδ<0.3）和拉伸永久变形（即<20％）降低。 。这表明形成了具有优异阻尼和弹性的柔软TPU材料。然而，ENR的加入就拉伸强度和断裂伸长率而言牺牲了机械性能，但是这些仍保持在工业用途的范围内。还发现动态硫化引起掺混物机械性能，松弛，阻尼，流变性能和弹性的增强。温度扫描应力松弛测量结果表明，动态固化的ENR / TPU共混物的应力松弛性能和耐热性有所改善。

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