Abstract
Poly (butylene terephthalate) (PBT) is a popular thermoplastic polyester resin but has low strength and low melting point. To improve its properties, PBT is often mixed with other resins, such as high‐density polyethylene (HDPE). In this study, PBT/HDPE samples with 100% PBT, 5%, 10%, 15%, and 100% HDPE are generated and tested. The samples are analyzed by tensile strength, flexural strength, impact strength, and SEM tests. Adding HDPE will reduce tensile strength compared to pure PBT, in which 5%, 10%, and 15% PBT/HDPE samples obtain the values 40.23, 38.11, and 27.77 MPa, respectively. These values are lower than that of pure PBT but still higher than that of HDPE. Improving the HDPE portion mostly results in decreasing flexural strength. The flexural strengths of these samples are 87.79, 70.47, 55.3, 58.98, and 19.14 MPa corresponding to 100% PBT, 5%, 10%, 15%, and 100% HDPE samples, respectively. Moreover, the SEM microstructure of PBT and HDPE indicates a two‐phase heterogeneous mixture with little or no adhesion between these phases.
Highlights
(butylene terephthalate) (PBT) is an important thermoplastic with good properties of chemical resistance, insulation, lubrication, and processing and has been widely used in the automobile and construction industry
Semicrystalline polybutylene terephthalate (PBT) has some disadvantages such as low impact strength and low melting strength. Erefore, it can be mixed with a variety of polyethylene polymers, such as high-density polyethylene (HDPE), lowdensity polyethylene (LDPE), linear low-density polyethylene (LLDPE), and polypropylene (PP), to create thermoplastic materials that are commonly used in the packaging industry. e blended polymers provide an alternative means of using recycled plastic waste by mixing one to another type of polymer
In a study by Chalabi Tehran et al [6], thermoplastic polyurethane (TPU) and clay nanoparticles have been integrated into PBT to improve impact properties and tensile strength
Summary
(butylene terephthalate) (PBT) is an important thermoplastic with good properties of chemical resistance, insulation, lubrication, and processing and has been widely used in the automobile and construction industry. It exhibits high rates of crystallization, allowing short cycle times when pressing. PBT can be mixed with other polymers. Erefore, it can be mixed with a variety of polyethylene polymers, such as high-density polyethylene (HDPE), lowdensity polyethylene (LDPE), linear low-density polyethylene (LLDPE), and polypropylene (PP), to create thermoplastic materials that are commonly used in the packaging industry. Toothbrush bristles are often made from polyamide (PA) and PBT fiber mixture. Jubinville et al [3] showed that the mixture can be well dispersed by using a suitable compatibilizer
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