Enhanced Mechanical and Thermal Properties of Modified Oil Palm Fiber-Reinforced Polypropylene Composite via Multi-Objective Optimization of In Situ Silica Sol-Gel Synthesis oleh Nasrullah Mat Rozi, Hamidah Abdul Hamid, Md. Sohrab Hossain, Nor Afifah Khalil, Ahmad Naim Ahmad Yahaya, Ahmad Noor Syimir Fizal, Mohd Yusoff Haris, Norkhairi Ahmad, Muzafar Zulkifli