The effects of polycarbonate (PC) crystals and physical and chemical interactions at the interface on the interfacial adhesion between PC and reinforcing fibers were explored. Carbon fibers (CFs) and glass fibers (GFs) with different surface functional groups were prepared as reinforcing fibers. The specimens were prepared by compositing each reinforcing fiber type with PC dissolved in tetrahydrofuran, and the interfacial adhesion was evaluated using a microdroplet test after annealing the samples at various temperatures. The Raman spectra of PC near the reinforcing fibers, molecular weight, and electron spin resonance (ESR) of PC were investigated. The results demonstrate that the π−π interactions between PC and CFs and the chemical interaction between the radicals generated in PC and the functional groups on the CF surface play key roles in the improvement of interfacial adhesion. Specifically, the detection of PC radicals by ESR, shown herein, is essential for understanding the chemical interactions.

探讨了聚碳酸酯 (PC) 晶体和界面处的物理化学相互作用对 PC 与增强纤维之间的界面粘合力的影响。制备具有不同表面官能团的碳纤维（CFs）和玻璃纤维（GFs）作为增强纤维。通过将每种增强纤维类型与溶解在四氢呋喃中的 PC 复合来制备样品，并在将样品在不同温度下退火后使用微滴测试评估界面粘附性。这研究了增强纤维附近 PC 的拉曼光谱、PC 的分子量和电子自旋共振 (ESR)。结果表明，PC和CFs之间的π-π相互作用以及PC中产生的自由基与CF表面官能团之间的化学相互作用在提高界面粘附性中起关键作用。具体来说，通过 ESR 检测 PC 自由基，如本文所示，对于理解化学相互作用至关重要。