PSI - Issue 68

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Procedia Structural Integrity 68 (2025) 1252–1258 Structural Integrity Procedia 00 (2024) 000–000 Structural Integrity Procedia 00 (2024) 000–000

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European Conference on Fracture 2024 Double edge notched tensile testing of PET / PAblends Carlos Fernandes da Silva a,b , Nicolas Willy Ferreira b , Alessandra Fernandes Santos a , Cla´udio Geraldo Scho¨n b, ∗ a Faculdade de Tecnologia de Maua´, Plastic Materials Production Department, Sa˜o Paulo State Technological College, Av. Antoˆnia Rosa Fioravanti, 804, Maua´, 09390-120, SP, Brazil b Universidade de Sa˜o Paulo Escola Polite´cnica, Department of Metallurgical and Materials Engineering, Av. Prof. Mello Moraes, 2463, Sa˜o Paulo, 05508-030, SP, Brazil Abstract Present work reports results of prospecting films of PET and PA, using two PA resins, standard PA 6.6 and PA 6T6I (PA modified with a terephtalate group) in four di ff erent contents (2.5, 5, 10 and 20 weight %) in the form of Double Edge Notched Tensile (DENT) samples. Results show that resin PA 6T6I is more compatible with PET, as expected, but the strength is only slightly a ff ected in the added range of both resins. © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ECF24 organizers. Keywords: Thermoplastics; Blends; Double Edge Notched Tension (DENT); Strength; Ductility European Conference on Fracture 2024 Double edge notched tensile testing of PET / PAblends Carlos Fernandes da Silva a,b , Nicolas Willy Ferreira b , Alessandra Fernandes Santos a , Cla´udio Geraldo Scho¨n b, ∗ a Faculdade de Tecnologia de Maua´, Plastic Materials Production Department, Sa˜o Paulo State Technological College, Av. Antoˆnia Rosa Fioravanti, 804, Maua´, 09390-120, SP, Brazil b Universidade de Sa˜o Paulo Escola Polite´cnica, Department of Metallurgical and Materials Engineering, Av. Prof. Mello Moraes, 2463, Sa˜o Paulo, 05508-030, SP, Brazil Abstract Present work reports results of prospecting films of PET and PA, using two PA resins, standard PA 6.6 and PA 6T6I (PA modified with a terephtalate group) in four di ff erent contents (2.5, 5, 10 and 20 weight %) in the form of Double Edge Notched Tensile (DENT) samples. Results show that resin PA 6T6I is more compatible with PET, as expected, but the strength is only slightly a ff ected in the added range of both resins. © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ECF24 organizers. Keywords: Thermoplastics; Blends; Double Edge Notched Tension (DENT); Strength; Ductility © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ECF24 organizers Polymers occupy a central role in present day industry, and are involved in defining the XXI st century lifestyle, since they are present in every day’s products Namazi (2017). The selection of a given polymer for a determined product, as expected, is driven by its properties, which eventually can be altered by the combination of di ff erent polymers, forming what is known as a blend Utracki (2002); Xavier (2002). Examples of applications range from energy storage Al-Muntaser et al. (2023) to improving antimicrobial properties of packaging Mei et al. (2024). Among the multitude of existing polymers, some reach predominance due to large production volumes and avail ability. Two of these cases are poly(ethylene terephtalate) (PET) and polyamide (PA). PET is a thermoplastic polymer, characterized by low crystallinity (which implies in excellent transparency when cooled fast enough), good mechan ical properties, as a good barrier for CO 2 , and presenting good chemical resistance. This combination of properties leads PET to be the preferred commodity for the production of bottles in the carbonated drinks industry, but its us age in form of films is growing also in other branches of the food industry as well as package containers for the Polymers occupy a central role in present day industry, and are involved in defining the XXI st century lifestyle, since they are present in every day’s products Namazi (2017). The selection of a given polymer for a determined product, as expected, is driven by its properties, which eventually can be altered by the combination of di ff erent polymers, forming what is known as a blend Utracki (2002); Xavier (2002). Examples of applications range from energy storage Al-Muntaser et al. (2023) to improving antimicrobial properties of packaging Mei et al. (2024). Among the multitude of existing polymers, some reach predominance due to large production volumes and avail ability. Two of these cases are poly(ethylene terephtalate) (PET) and polyamide (PA). PET is a thermoplastic polymer, characterized by low crystallinity (which implies in excellent transparency when cooled fast enough), good mechan ical properties, as a good barrier for CO 2 , and presenting good chemical resistance. This combination of properties leads PET to be the preferred commodity for the production of bottles in the carbonated drinks industry, but its us age in form of films is growing also in other branches of the food industry as well as package containers for the 1. Introduction 1. Introduction

∗ Corresponding author. Tel.: + 55-11-3091-5726 ; fax: + 55-11-3091-5243. E-mail address: schoen@usp.br ∗ Corresponding author. Tel.: + 55-11-3091-5726 ; fax: + 55-11-3091-5243. E-mail address: schoen@usp.br

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ECF24 organizers 10.1016/j.prostr.2025.06.195 2210-7843 © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ECF24 organizers. 2210-7843 © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ECF24 organizers.