Effect of Glass Fiber on the Tensile Strength of Poly(butylene terephthalate)/Polyamide 6 Blends

• Published in: Polymer Science. Series A Vol. 65; no. 5; pp. 543 - 549
• Main Authors: Pham Thi Hong Nga, Phuc, Ly Huynh Thien, Ngan, Lu Dinh Hoang, Triem, Tran Dinh, Uyen, Tran Minh The, Van Thuc, Nguyen, Tan, Nguyen Thanh, Van Huong, Hoang, Thanh, Nguyen Chi, Trung, Huynh Hoang, Nhan, Nguyen Khac, Tien, Nguyen Vinh
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2023; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Deviation; Elongation; Fiberglass; Fire resistant materials; Glass fiber reinforced plastics; Injection molding; Mechanical properties; Mixtures; Polyamide resins; Polybutylene terephthalates; Polymer Blends; Polymer Sciences; Tensile strength; Terephthalate
• ISSN: 0965-545X; 1555-6107
• DOI: 10.1134/S0965545X23701158

This study analyzed and evaluated the mechanical properties of the Poly(butylene terephthalate) (PBT)/Polyamide 6 (PA6) mixture and the effect of glass fiber (GF) when mixed with PBT/PA6 mixture. Some potential applications are recycling PBT and PA6 into insulation or fire-retardant materials by mixing with an appropriate amount of fiberglass (GF). PBT/PA6/GF mixtures are prepared by injection molding method with 0, 3, and 6% GF in each PBT/PA6 mixture in 25/75, 50/50, and 75/25 respectively. After the injection molding, the samples are tested for tensile strength according to ASTM D638. The average tensile strength of PBT/PA6 at 25/75, 50/50, 75/25, and 100% PBT is 48.58, 42.52, 34.91, and 52.21 MPa. It shows that the tensile strength of the PBT/PA6 mixture decreases as the PBT content increases. The average elongation of the samples had a considerable deviation, with 25%PBT/75%PA6 reaching the maximum value of 37.92% and the 75%PBT/25%PA6 sample getting a nominal value of 0.94%. Besides, when mixing GF fiberglass into a PBT/PA6 blend with a 0 and 3% GF ratio, the tensile strength changes and decreases instability. But at 6% GF, there is a clear improvement as tensile strength gradually increases at all PBT/PA6 ratios. Therefore, to obtain an excellent tensile strength value, the GF content in the mixture should be more significant than 6% by weight of the blend. The elongation of PBT/PA6/GF samples is stable when the highest deviation is slight between the ratios. This research aims to serve as a reference for developing a method of mixing materials to produce the desired mechanical properties.