Thach Thai Van, Nguyen Trung Kien, Nguyen Nhat Thinh, Tran Chi Thien, Nguyen Thanh Tan, Pham Thi Hong Nga*
Ho Chi Minh City University of Technology and Education, Ho Chi Minh 71300, Vietnam.
*Corresponding author: Pham Thi Hong Nga
This work belongs to project grant No: SV2025-335 funded by Ho Chi Minh City University of Technology and Education, Vietnam.
Abstract
In this study, test samples were created using the injection molding method. A blend of high-density polyethylene (HDPE) and polypropylene (PP) was mixed in different ratios: 0/100, 25/75, 50/50, 75/25, and 100/0. Based on experimental measurements and analysis, it can be concluded that increasing the HDPE content in the mixture to 25% improves the impact toughness of the mixture from 4.36 kJ/m² to 5.13 kJ/m². However, at a 50% HDPE ratio, the impact toughness decreases to 4.9 kJ/m², and when the HDPE content is raised to 75%, the impact toughness of the mixture further decreases to 4.66 kJ/m². Notably, the sample with the highest impact toughness is the 100% virgin HDPE sample, with an impact toughness of 6.46 kJ/m². The microstructure observed in SEM images of the fracture surfaces of various ratios shows that the uniform distribution of PP particle sizes within the PP/HDPE blend influences the impact toughness of the mixture. The images indicate that the impact strength of V-notch samples of the PP/HDPE blend gradually increases with HDPE content in the mixture.
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How to cite this paper
Research on the Impact Strength of Polypropylene/High Density Polyethylene Blend
How to cite this paper: Thach Thai Van, Nguyen Trung Kien, Nguyen Nhat Thinh, Tran Chi Thien, Nguyen Thanh Tan, Pham Thi Hong Nga. (2025). Research on the Impact Strength of Polypropylene/High Density Polyethylene Blend. Engineering Advances, 5(4), 177-184.
DOI: http://dx.doi.org/10.26855/ea.2025.10.009