Quadrini Fabrizio, Patrizii Giorgio, Proietti Alice, Iorio Leandro, Bellisario Denise, Santo Loredana
Department of Industrial Engineering, University of Rome "Tor Vergata", Via del Politecnico 1, 00133 Rome, Italy.
Polymers (Basel). 2024 Sep 26;16(19):2722. doi: 10.3390/polym16192722.
Thermoplastic fiberglass was compression molded in the form of thick panels with a nominal thickness of 10 mm and a size of 300 × 300 mm. A simplified procedure was adopted to speed up the lamination procedure and adapt it to the aim of recycling waste, glass fibers, fabrics, and thermoplastic films. Low density polyethylene was used as a matrix to simplify the laboratory process, but the same procedure can be extended to other thermoplastic film, such as polyamide. The final thermoplastic composite shows unique properties in terms of its repairability, and its performance was improved by increasing the number of repairing repetitions. For this aim, a repairability test was designed in the bending configuration, and three consecutive cycles of bending/repairing/bending were carried out. The static mechanical properties of the final thermoplastic composite were, conversely, low in comparison with traditional fiberglass because of the choice of a polyethylene matrix. The bending tests showed that the maximum strength was lower than 10 MPa and the elastic modulus was less than 1 GPa. Nevertheless, the toughness of the thermoplastic composite was high, and the samples continued to deform under bending without splitting into two halves.
热塑性玻璃纤维被模压成厚板形式，标称厚度为10毫米，尺寸为300×300毫米。采用了一种简化程序来加快层压过程，并使其适应回收废料、玻璃纤维、织物和热塑性薄膜的目标。低密度聚乙烯被用作基体以简化实验室过程，但相同程序可扩展到其他热塑性薄膜，如聚酰胺。最终的热塑性复合材料在可修复性方面表现出独特性能，并且通过增加修复重复次数提高了其性能。为此，设计了一种弯曲构型的可修复性测试，并进行了三个连续的弯曲/修复/弯曲循环。相反，由于选择了聚乙烯基体，最终热塑性复合材料的静态力学性能与传统玻璃纤维相比很低。弯曲测试表明，最大强度低于10兆帕，弹性模量小于1吉帕。然而，热塑性复合材料的韧性很高，样品在弯曲下继续变形而不会分裂成两半。
