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首页> 外文期刊>Journal of Applied Polymer Science >Chlorosulfonated polyethylene-polypropylene thermoplastic vulcanizate: Mechanical, morphological, thermal, and rheological properties
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Chlorosulfonated polyethylene-polypropylene thermoplastic vulcanizate: Mechanical, morphological, thermal, and rheological properties

机译：氯磺化聚乙烯-聚丙烯热塑性硫化橡胶：机械，形态，热和流变性能

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摘要

Different thermoplastic vulcanizate (TPV) blends were prepared from elastomeric chlorosulfonated polyethylene (CSM) and thermoplastic polypropylene (PP) by employing dynamic vulcanization technique. The mechanical properties of such blends were compared in respect of their stress at 25% modulus (25%M), ultimate tensile strength (UTS), percent elongation at break, and hardness to those of pure CSM. The mechanical analysis showed substantial improvement in stress at 25%M, UTS, and hardness values with the incorporation of 15-40 parts of thermoplastic contents (PP) (per hundred parts of blend). The two-phase morphologies were clearly observed by scanning electron microscopy studies. The thermal properties were studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). DSC studies showed a decreasing trend in glass transition temperature (T _g) and TGA studies indicated the increase in thermal stability of all TPV blends with respect to the elastomeric CSM. Rheological studies showed that there is an increasing trend in shear melt viscosity of TPV blends with the increase in PP amount as the higher content of isotactic PP used in the present case increases the melt viscosity. The TPVs obtained after the rheotron studies displayed identical shear stress/strain pattern when further subjected to the same study.
机译：通过采用动态硫化技术，由弹性氯磺化聚乙烯（CSM）和热塑性聚丙烯（PP）制备了不同的热塑性硫化橡胶（TPV）共混物。相对于纯CSM的共混物在25％模量（25％M）时的应力，极限拉伸强度（UTS），断裂伸长率和硬度，比较了它们的机械性能。力学分析表明，加入15-40份热塑性成分（PP）（每100份共混物），在25％M，UTS和硬度值下的应力有了显着改善。通过扫描电子显微镜研究清楚地观察到了两相形态。通过差示扫描量热法（DSC）和热重分析（TGA）研究了热性能。 DSC研究表明玻璃化转变温度（T_g）呈下降趋势，TGA研究表明，相对于弹性体CSM，所有TPV混合物的热稳定性均得到提高。流变学研究表明，随着PP用量的增加，TPV共混物的剪切熔体粘度呈增加趋势，这是因为在当前情况下使用的等规PP含量较高时，熔体粘度会增加。在进行了相同的研究后，在流变子研究之后获得的TPV表现出相同的剪切应力/应变模式。

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