Pinto Rochele, Glaskova-Kuzmina Tatjana, Zukiene Kristina, Monastyreckis Gediminas, Novakova Marie, Spacek Vladimir, Kovalovs Andrejs, Aniskevich Andrey, Zeleniakiene Daiva
Department of Mechanical Engineering, Kaunas University of Technology, Studentu St. 56, 51424 Kaunas, Lithuania.
Department of Production Engineering, Kaunas University of Technology, Studentu St. 56, 51424 Kaunas, Lithuania.
Polymers (Basel). 2024 Oct 16;16(20):2909. doi: 10.3390/polym16202909.
This study is aimed at developing a fibre-reinforced polymer composite with a high bio-based content and to investigate its mechanical properties. A novel basalt fibre-reinforced polymer (BFRP) composite with bio-based matrix modified with different contents of star-like n-butyl methacrylate (-BMA) block glycidyl methacrylate (GMA) copolymer has been developed. -BMA blocks have flexible butyl units, while the epoxide group of GMA makes it miscible with the epoxy resin and is involved in the crosslinking network. The effect of the star-like polymer on the rheological behaviour of the epoxy was studied. The viscosity of the epoxy increased with increase in star-like polymer content. Tensile tests showed no noteworthy influence of star-like polymer on tensile properties. The addition of 0.5 wt.% star-like polymer increased the glass transition temperature by 8.2 °C. Mode-I interlaminar fracture toughness and low-velocity impact tests were performed on star-like polymer-modified BFRP laminates, where interfacial adhesion and impact energy capabilities were observed. Interlaminar fracture toughness improved by 45% and energy absorption capability increased threefold for BFRP laminates modified with 1 wt.% of star-like polymer when compared to unmodified BFRP laminates. This improvement could be attributed to the increase in ductility of the matrix on the addition of the star-like polymer, increasing resistance to impact and damage. Furthermore, scanning electron microscopy confirmed that with increase in star-like polymer content, the interfacial adhesion between the matrix and fibres improves.
本研究旨在开发一种具有高生物基含量的纤维增强聚合物复合材料，并研究其力学性能。已开发出一种新型玄武岩纤维增强聚合物（BFRP）复合材料，其生物基基体用不同含量的星状甲基丙烯酸正丁酯（-BMA）-甲基丙烯酸缩水甘油酯（GMA）共聚物进行了改性。-BMA链段具有柔性丁基单元，而GMA的环氧基团使其可与环氧树脂混溶并参与交联网络。研究了星状聚合物对环氧树脂流变行为的影响。环氧树脂的粘度随星状聚合物含量的增加而增大。拉伸试验表明星状聚合物对拉伸性能没有显著影响。添加0.5 wt.%的星状聚合物使玻璃化转变温度提高了8.2℃。对星状聚合物改性的BFRP层压板进行了I型层间断裂韧性和低速冲击试验，观察了其界面粘结和冲击能量性能。与未改性的BFRP层压板相比，用1 wt.%星状聚合物改性的BFRP层压板的层间断裂韧性提高了45%，能量吸收能力提高了三倍。这种改善可归因于添加星状聚合物后基体延展性的增加，从而提高了抗冲击和抗损伤能力。此外，扫描电子显微镜证实，随着星状聚合物含量的增加，基体与纤维之间的界面粘结得到改善。
