Mahmood Haroon, Dorigato Andrea, Pegoretti Alessandro
Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.
National Interuniversity Consortium of Materials Science and Technology (INSTM), via Giuseppe Giusti 9, 50121 Florence, Italy.
Materials (Basel). 2020 May 7;13(9):2165. doi: 10.3390/ma13092165.
Cyclic olefin copolymer (COC) particles were dispersed in various amounts in an epoxy matrix, and the resulting blends were used to impregnate unidirectional carbon fibers (CF) by hand lay-up. The thermal stability was not substantially modified by the presence of COC particles. The mixture of the two polymers resulted in a phase separated blend and the flexural modulus and interlaminar shear strength progressively decreased with the addition of COC particles in the laminates. Mode I fracture toughness tests were executed on double cantilever beam specimens. The opened crack was then thermally mended at 190 °C for 1 h. The laminates containing 30 wt.% of COC particles showed a healing efficiency of ~180%.
将不同量的环烯烃共聚物（COC）颗粒分散在环氧基质中，然后通过手工铺层将所得共混物用于浸渍单向碳纤维（CF）。COC颗粒的存在并未对热稳定性产生实质性影响。两种聚合物的混合导致了相分离共混物，并且随着层压板中COC颗粒的添加，弯曲模量和层间剪切强度逐渐降低。对双悬臂梁试样进行了I型断裂韧性测试。然后将打开的裂纹在190°C下热修复1小时。含有30 wt.% COC颗粒的层压板显示出约180%的愈合效率。
