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首页> 外文期刊>Journal of Applied Polymer Science >Investigation of the phase morphology of dynamically vulcanized PVC/NBR blends using atomic force microscopy
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Investigation of the phase morphology of dynamically vulcanized PVC/NBR blends using atomic force microscopy

机译：用原子力显微镜研究动态硫化的PVC / NBR共混物的相形态

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摘要

Dynamic vulcanization is a mixing process employed in the melt state of elastomers with thermoplastics. This process may result in the formation of thermoplastic vulcanized (TPV) materials with improved properties such as mechanical strength, Young's modulus, hardness, and abrasion fatigue. In this study, a vulcanized thermoplastic was obtained by the dynamic vulcanization of poly(vinyl chloride)/acrylonitrile butadiene rubber (PVC/NBR) blends using a curative system based on sulfur (S)/tetramethylthiuram disulfide (TMTD) and mercaptobenzothiazyl disulfide (MBTS). The formation of crosslinks was characterized by differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy. The mechanical properties were analyzed by tensile tests and the phase morphology was investigated using atomic force microscopy (AFM) operating in the tapping mode-AFM. The phase images of the dynamically vulcanized blends showed an elongated morphology, which can be associated to the formation of crosslinks that give the material its excellent mechanical properties.
机译：动态硫化是在弹性体与热塑性塑料熔融状态下采用的混合工艺。此过程可能导致形成热塑性硫化（TPV）材料，并具有改善的性能，例如机械强度，杨氏模量，硬度和耐磨性疲劳。在这项研究中，通过使用基于硫（S）/四甲基秋兰姆二硫化物（TMTD）和巯基苯并噻唑二硫化物（MBTS）的固化体系对聚（氯乙烯）/丙烯腈丁二烯橡胶（PVC / NBR）共混物进行动态硫化，获得了硫化热塑性塑料）。交联的形成通过差示扫描量热法（DSC）和傅立叶变换红外光谱（FTIR）进行表征。通过拉伸试验分析机械性能，并使用以攻丝模式-AFM操作的原子力显微镜（AFM）研究相态。动态硫化共混物的相图显示出伸长的形态，这可能与交联形成有关，交联使材料具有出色的机械性能。

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