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Engineering Advances

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ArticleOpen Access http://dx.doi.org/10.26855/ea.2025.10.013

Study on the Impact Strength of High-density Polyethylene/Polyethylene Terephthalate Blend

Vo Ngoc Hoang Thu, Diep Minh Hao, Nguyen Duy Nam, Pham Thi Hong Nga*, Nguyen Thanh Tan, Nguyen Vinh Tien, Duong Thi Van Anh

Ho Chi Minh City University of Technology and Education, Ho Chi Minh City 71307, Vietnam.

*Corresponding author: Pham Thi Hong Nga

This work belongs to project grant No: SV2025-383 funded by Ho Chi Minh City University of Technology and Education, Vietnam.
Published: December 17,2025

Abstract

This paper studies and evaluates the mechanical properties of a blend of Polyethylene terephthalate (PET) and high-density polyethylene (HDPE). The HDPE/PET blend is prepared by injection molding PET into HDPE at 0%, 10%, 20%, and 30% PET content, respectively. After injection molding, the samples were tested for impact toughness according to ASTM D256. The results showed that the impact toughness values of HDPE/PET gradually decreased by 5.14, 4.91, 3.44, and 2.95 kJ/m2. It was found that the impact toughness of the HDPE/PET composite decreased gradually as the PET content increased. The penetration of PET into the HDPE structure increased the PET ratio’s elastic modulus, leading to a significant decrease in impact strength. This study is intended as a reference for developing a material-mixing method to produce a desirable mechanical property, recycling in the automotive industry, and insulating capacitance in a mixed HDPE/PET blend.

Keywords

High-density Polyethylene; Polyethylene Terephthalate; HDPE/PET blend; impact toughness

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How to cite this paper

Study on the Impact Strength of High-density Polyethylene/Polyethylene Terephthalate Blend

How to cite this paper: Vo Ngoc Hoang Thu, Diep Minh Hao, Nguyen Duy Nam, Pham Thi Hong Nga, Nguyen Thanh Tan, Nguyen Vinh Tien, Duong Thi Van Anh. (2025). Study on the Impact Strength of High-density Polyethylene/Polyethylene Terephthalate Blend. Engineering Advances5(4), 205-211.

DOI: http://dx.doi.org/10.26855/ea.2025.10.013