Effects of plasticizing time on flexural fatigue of soft Poly(vinyl chloride)

Journal of Elastomers & Plastics Pub Date : 2022-12-20 DOI:10.1177/00952443221147640

Yupeng Su, Chen Lian, Yanlu Chen, Kehui Han, Yao Ma, Xinyan Shi

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Abstract

In this study, seven gradient plasticizing time at 200°C were set to explore the effects on Bally Flex fatigue of soft poly(vinyl chloride) (PVC). The results showed that the rotational rheometer was well used to characterize the plasticizing process of PVC paste. The optimum plasticizing temperature of soft PVC was about 180°C. Within a certain range of plasticizing time, the glass transition temperature of soft PVC decreased with the extension of plasticizing time, and the Bally Flex fatigue life was prolonged as the plasticizing time extended. When the plasticizing time was 105 s, the plasticization was nearly completed, which can be used as an optimum plasticizing time in terms of manufacturing efficiency and quality. When the plasticization time was 135 s, the degree of plasticization was the highest. The fatigue cycles of Bally Flex and breaking energy (W) at −20°C were 136,000 and 4850 J·m−3, respectively. It was concluded that Bally Flex fatigue life and W had a good positive correlation. Thus, the tensile test can be used as a simple approach to predict the Bally Flex fatigue life trend of soft PVC specimens.

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塑化时间对软质聚氯乙烯弯曲疲劳的影响

本研究设置了7个梯度塑化时间，在200℃下探讨了对软质聚氯乙烯(PVC) Bally弯曲疲劳的影响。结果表明，旋转流变仪可以很好地表征PVC浆料的塑化过程。软聚氯乙烯的最佳塑化温度为180℃左右。在一定的塑化时间范围内，软质PVC的玻璃化转变温度随着塑化时间的延长而降低，Bally挠曲疲劳寿命随着塑化时间的延长而延长。当塑化时间为105s时，塑化基本完成，从制造效率和质量上考虑，可作为最佳塑化时间。当塑化时间为135 s时，塑化程度最高。在- 20℃时，Bally弯曲的疲劳循环次数和断裂能(W)分别为136,000和4850 J·m−3。结果表明，Bally弯曲疲劳寿命与W呈良好的正相关关系。因此，拉伸试验可作为预测软质PVC试件Bally弯曲疲劳寿命趋势的一种简便方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Journal of Elastomers & Plastics

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