Healable Carbon Fiber-Reinforced Epoxy/Cyclic Olefin Copolymer Composites
Healable Carbon Fiber-Reinforced Epoxy/Cyclic Olefin Copolymer Composites
复制标题
DOI：
10.3390/ma13092165
复制
发表时间：
2020-05-01
期刊：
影响因子：
3.4
通讯作者：
Pegoretti, Alessandro
中科院分区：
文献类型：
--
作者：
Mahmood, Haroon;Dorigato, Andrea;Pegoretti, Alessandro
将环烯烃共聚物（COC）颗粒以不同的量分散在环氧树脂基体中，并将所得共混物用于通过手铺法涂覆单向碳纤维（CF）。COC颗粒的存在基本上没有改变热稳定性。两种聚合物的混合物导致相分离的共混物，并且弯曲模量和层间剪切强度随着COC颗粒在层压板中的添加而逐渐降低。对双悬臂梁试样进行了Ⅰ型断裂韧性试验。然后在190 ℃下热修补打开的裂纹1小时。所述层压材料含有30重量%的COC颗粒显示出类似于180%的愈合效率。
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 degrees C for 1 h. The laminates containing 30 wt.% of COC particles showed a healing efficiency of similar to 180%.