Spychała Maciej Jan, Latko-Durałek Paulina, Miedzińska Danuta, Sałasińska Kamila, Cetnar Iga, Popławski Arkadiusz, Boczkowska Anna
Faculty of Mechanical Engineering, Military University of Technology, Kaliskiego 2 St., 00-908 Warsaw, Poland.
Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141 St., 02-507 Warsaw, Poland.
Materials (Basel). 2024 Nov 29;17(23):5875. doi: 10.3390/ma17235875.
The increasing complexity and production volume of glass-fiber-reinforced polymers (GFRP) present significant recycling challenges. This paper explores a potential use for mechanically recycled GFRP by blending it with high-density polyethylene (HDPE). This composite could be applied in products such as terrace boards, pipes, or fence posts, or as a substitute filler for wood flour and chalk. Recycled GFRP from post-consumer bus bumpers were ground and then combined with recycled HDPE in a twin-screw extruder at concentrations of 10, 20, 30, and 40 wt%. The study examined the mechanical and structural properties of the resulting composites, including the effects of aging and re-extrusion. The modulus of elasticity increased from 0.878 GPa for pure rHDPE to 1.806 GPa for composites with 40 wt% recycled GFRP, while the tensile strength ranged from 36.5 MPa to 28.7 MPa. Additionally, the porosity increased linearly from 2.65% to 7.44% for composites with 10 wt% and 40 wt% recycled GFRP, respectively. Aging and re-extrusion improved the mechanical properties, with the tensile strength of the 40 wt% GFRP composite reaching 34.1 MPa, attributed to a reduction in porosity by nearly half, reaching 3.43%.
玻璃纤维增强聚合物（GFRP）日益复杂的结构和产量给回收利用带来了重大挑战。本文探讨了将机械回收的GFRP与高密度聚乙烯（HDPE）共混的潜在用途。这种复合材料可应用于露台板、管道或围栏柱等产品，或作为木粉和白垩的替代填料。将消费后公交车保险杠回收的GFRP磨碎，然后在双螺杆挤出机中与回收的HDPE以10%、20%、30%和40%（重量）的浓度混合。该研究考察了所得复合材料的力学和结构性能，包括老化和再挤出的影响。弹性模量从纯再生HDPE的0.878吉帕增加到含40%（重量）回收GFRP的复合材料的1.806吉帕，而拉伸强度在36.5兆帕至28.7兆帕之间。此外，含10%和40%（重量）回收GFRP的复合材料的孔隙率分别从2.65%线性增加到7.44%。老化和再挤出改善了力学性能，含40%（重量）GFRP的复合材料的拉伸强度达到34.1兆帕，这归因于孔隙率降低了近一半，降至3.43%。
