Application of fracture mechanics for the characterization of PVC pipes. I. Evaluation of the applicability of the EWF technique in specimens produced directly from pipes,Journal of Vinyl and Additive Technology

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Application of fracture mechanics for the characterization of PVC pipes. I. Evaluation of the applicability of the EWF technique in specimens produced directly from pipes
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2020-08-21 , DOI: 10.1002/vnl.21798
Antonio Rodolfo ₁

Affiliation

Unplasticized (U‐PVC) and modified (M‐PVC) pipes used in irrigation and infrastructure applications in Brazil (nominal diameter DN 300, outside diameter 326 mm), were evaluated according to various fracture mechanics methodologies, including essential work of fracture (EWF), C‐ring toughness and fracture toughness parameters (stress intensity factor K_C and energy release rate G_C, both at plastic collapse). These pipes were also evaluated for the quality of processing (degree of gelation) via DSC and tensile strength. Results show that the differences in behavior against fracture propagation are sensitive, depending on the technique, when comparing the results between the different types of pipes, opening up new possibilities for testing this product. This possibility is particularly interesting in the case of the evaluation of the degree of gelation in industrial process controls, since the dichloromethane (DCMT) solvent immersion method still in use tends to be replaced in the future by alternative methodologies due to chemical exposure factors.

中文翻译：

断裂力学在表征PVC管中的应用。I. EWF技术在直接从管道中生产的标本中的适用性评估

根据各种断裂力学方法（包括断裂的基本功（EWF））评估了巴西用于灌溉和基础设施应用的非增塑（U-PVC）和改性（M-PVC）管道（标称直径DN 300，外径326 mm）），C环韧性和断裂韧性参数（应力强度因子K _C和能量释放率G _C，无论是在塑料塌陷处）。还通过DSC和拉伸强度评估了这些管的加工质量（胶凝度）。结果表明，根据技术的不同，在比较不同类型管道的结果时，针对裂缝扩展的行为差异是敏感的，这为测试该产品开辟了新的可能性。在工业过程控制中评估凝胶化程度的情况下，这种可能性特别有趣，因为由于化学暴露因素，将来仍会使用其他方法替代仍在使用的二氯甲烷（DCMT）溶剂浸渍方法。

更新日期：2020-08-21

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