人造金刚石填充聚酰亚胺树脂基复合材料防刺性能

为研究树脂材料的防刺性能及防刺机制,利用手糊成型与热压法成型制备了手糊分层结构和均布结构层2种结构的人造金刚石填充聚酰亚胺树脂基复合树脂片,并探讨了人造金刚石粒径、填充体积分数对树脂片防刺性能的影响。研究结果表明:经过人造金刚石填充的聚酰亚胺树脂片的防刺性能得到提高,并且均布结构层分层复合结构的树脂片的防刺性能更好;随着人造金刚石粒径的减小,树脂片防刺性能出现先减小后增加的趋势,故防刺机制基本在于碰撞概率与树脂基的防挡;比较防刺力和消耗功发现,不同填充体积分数的单层防刺树脂片的防刺性能随人造金刚石填充体积分数的增加而逐渐降低,该趋势的成因在于复合树脂片的脆化与破坏;在颗粒等效粒径为300 μm、体积分数为10%时,其防刺性能最好。

Stab resistance of composites with synthetic diamond filled polyimide resin matrix

In order to study the stab resistance and mechanism of resin materials, two types of synthetic diamond-filled polyimide resin-based composite resin sheets were prepared by hand-forming and hot-pressing, respectively, which were hand lay-up and uniform composites. The effects of particle size and filling volume fraction of synthetic diamond on puncture resistance of the resin sheet are discussed. The results showed that the anti-stab performance of the polyimide resin sheet are improved due to synthetic diamond fillings, and the composite structure make from such resin demonstrates the better stab resistance. It is found that as the number of synthetic diamonds meshes increased, leading to diameter decrease, the stab resistance of the composite decreases first followed by an increase. It is understood that the stab-proof mechanism is basically associated to the collision probability and the resin-based anti-blocking. From analyzing the stab resistance and the work done, the stab resistance of the resin sheet gradually decreases with the increase of the volume fraction of the artificial diamond filling, which is believed to be caused by embrittlement and destruction of the composite resin sheet. In particular, the resin has the optimal stab resistance when the particle diameter is 300 μm and the volume fraction is 10% in the sheet.