Multifunctional Hybrid Composites with Enhanced Mechanical and Thermal Properties Based on Polybenzoxazine and Chopped Kevlar/Carbon Hybrid Fibers oleh Hamid Abdelhafid Ghouti, Abdeldjalil Zegaoui, Mehdi Derradji, Wan-an Cai, Jun Wang, Wen-bin Liu, Abdul Qadeer Dayo