Synergizing strength and flexibility: investigating mechanical properties of photopolymer resin blends in DLP 3D printing
Penulis/Author
Dinny Harnany, S.T., M. Sc. (1); MAHESAFIN ALNA RAMADHAN (2); Haris Ardianto (3); Prof. Ir. Jamasri, Ph.D., IPU., ASEAN Eng. (4); Ir. Muhammad Akhsin Muflikhun, S.T., MSME., Ph.D (5)
Tanggal/Date
2024
Kata Kunci/Keyword
Abstrak/Abstract
The implementation of digital light processing (DLP) 3D printing technology has significantly advanced additive manufactur
ing (AM), allowing for the production of highly accurate three-dimensional parts with customizable mechanical properties.
This study evaluated the mechanical properties of photopolymer resins, specifically in blends of standard and flexible resins,
to determine their effect on tensile strength, elongation, hardness, fracture surface and chemical functional group analysis.
The test results showed that the standard resin (R) had the highest tensile strength of 15.660 MPa. However, the inclusion
of the flexible resin (F) resulted in a gradual decrease in tensile strength, reaching its lowest value of 0.417 MPa when the
f
lexible resin composition reached 100%. Furthermore, the hardness tests showed a correlation between the amount of flex
ible resin and a decrease in hardness. Sample R had the maximum Shore D hardness of 62.9, while sample F had a Shore A
hardness of 48.8. Examination of the fracture surface revealed that the addition of more flexible resin to the blend resulted
in a rougher fracture surface. Sample F had the highest Ra value of 5.59 μm. The study found that the mechanical strength
of the material was dramatically reduced when flexible resin was added to increase the material’s flexibility. However, the
material’s ability to tolerate plastic deformation without premature failure was increased. The results play a critical role
in identifying the ideal resin composition for specific applications of DLP 3D printing technology, particularly those that
require a harmonious combination of strength and flexibility
