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首页> 外文期刊>Journal of thermal analysis and calorimetry >Characterization of processing, rheological and dynamic mechanical thermal properties of PVC stabilized with polyphenol-based thermal stabilizer
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Characterization of processing, rheological and dynamic mechanical thermal properties of PVC stabilized with polyphenol-based thermal stabilizer

机译：用聚酚基热稳定器稳定PVC的加工，流变和动态机械热性能的表征

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摘要

The effects of natural polyphenol-based thermal stabilizer synthesized from tannin, a flavonoid-type natural polyphenol, on the processing, rheological and viscoelastic behaviors of polyvinyl chloride (PVC) were investigated in this work. Rheological properties of PVC were studied via three different types of rheometry techniques: torque by an instrumented batch mixer, dynamic oscillating shear rheometry, and dynamic mechanical thermal analysis (DMTA). In the course of the investigation, rotational melt rheological properties in terms of shear complex viscosity, storage modulus, and loss modulus were studied in order to evaluate the performance of tannin-cadmium complex as bio-based PVC additive and as a thermal stabilizer. Experimental results of this study for all PVC formulations with this derivative at loading percentages of 1, 2, and 3 parts per hundred of PVC resin (phr) reveal that the processing and dynamic thermal stability of PVC monitored by torque curves and rheological tests can be enhanced with the addition of this derivative. Rheological behavior of PVC stabilized with tannin derivative is superior or very close to that of PVC stabilized with trade-grade thermal stabilizer. Additionally, DMTA was carried out to see the effect of tannin-cadmium at 2 phr on the thermo-mechanical properties of PVC. All DMTA-related terms such as storage modulus and damping factor and glass transition region point out that the PVC has good viscoelastic properties compared to that of PVC stabilized with commercial thermal stabilizer.
机译：在本工作中研究了从单宁（一种类黄酮类天然多酚）合成的天然多酚基热稳定剂的影响，对聚氯乙烯（PVC）的加工，流变学和粘弹性行为进行研究。通过三种不同类型的抽速技术研究了PVC的流变性能：通过仪表批量混合器，动态振荡剪切流变学和动态机械热分析（DMTA）进行扭矩。在调查过程中，研究了剪切复合粘度，储存模量和损失模量方面的旋转熔体流变性能，以评估单宁 - 镉络合物作为生物基PVC添加剂的性能和作为热稳定剂的性能。该研究的实验结果对于所有PVC制剂的衍生物加载百分比1,2和3份PVC树脂（PHR），揭示了通过扭矩曲线和流变测试监测的PVC的加工和动态热稳定性加入该衍生物增强。用单宁衍生物稳定PVC的流变行为优异或非常接近与贸易级热稳定剂稳定的PVC。另外，进行DMTA，以在PVC的热机械性能下观察Tannin-镉的效果。所有DMTA相关的术语，如储存模量和阻尼因子和玻璃化转变区域指出，与用商业热稳定剂稳定的PVC相比，PVC具有良好的粘弹性。

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