材料科学
聚氨酯
复合材料
热重分析
动态力学分析
环氧树脂
扫描电子显微镜
复合数
碳纳米管
纳米复合材料
极限抗拉强度
固化(化学)
响应面法
化学工程
聚合物
机器学习
工程类
计算机科学
作者
Marzieh Sarafrazi,Masood Hamadanian,Ahmad Reza Ghasemi
标识
DOI:10.1016/j.mechmat.2019.103154
摘要
In this research, the effect of three factors amounts of polyurethane, post-curing temperature and time on the mechanical properties of epoxy/polyurethane (EP/PU) composite have been studied. Response surface methodology (RSM) coupled with central composite design was used to optimize the mechanical properties of these composites. The optimization results also show that yield strength and Young's modulus at optimum value improved up to 23.3% and 10% compared to neat epoxy matrix. The chemical structure of the EP/PU composites were characterized by FT-Infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), UV–vis diffuse reflection (DRS) and Thermogravimetric analysis (TGA), also the mechanical properties were obtained by Dynamic Mechanical Thermal Analysis (DMTA) and tensile test measurements. The FT-IR spectra indicate a very weak interaction between EP and PU. Also, the influence of multi-wall carbon nanotube (MWCNT) with different concentrations (0–0.25 wt.%) on mechanical and physical properties of EP/PU matrix was investigated. The interaction behavior of the MWCNT with EP/PU as a matrix was investigated using XRD, FT-IR and molecular dynamic (MD) simulations. Dispersion of MWCNT in the EP/PU composite was also observed using SEM. The yield strength of EP/PU/MWCNT nanocomposites increased about 59.7% with the addition of 0.15 wt.% MWCNT nanofiller.
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