Zheng Ting, Wang Xiaodong, Lu Chunrui, Zhang Xiaohong, Ji Yi, Bai Chengying, Chen Yiwen, Qiao Yingjie
School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Polymers (Basel). 2019 Apr 15;11(4):680. doi: 10.3390/polym11040680.
In this study, the curing kinetics of the phenolic amine/epoxy resin system were investigated by nonisothermal differential scanning calorimetry (DSC). The model-free isoconversional method of Ozawa-Flynn-Wall reveals a dependence of (activation energy) on conversion (α), which interprets the autocatalytic curing reaction mechanism of the phenolic amine/epoxy resin system. Studies on the effects of nano-SiO₂ particles on the tensile properties and tensile fracture face morphology of nanocomposites show that the uniform dispersion of SiO₂ nanoparticles plays an important role in promoting the tensile performance of nanocomposites. Additionally, increases of 184.1% and 217.2% were achieved by adding 1.5% weight parts of nano-SiO₂ in composites for the tensile strength and tensile modulus, respectively.
在本研究中，采用非等温差示扫描量热法（DSC）研究了酚醛胺/环氧树脂体系的固化动力学。Ozawa-Flynn-Wall无模型等转化率方法揭示了活化能（E）对转化率（α）的依赖性，这解释了酚醛胺/环氧树脂体系的自催化固化反应机理。对纳米SiO₂颗粒对纳米复合材料拉伸性能和拉伸断裂面形态影响的研究表明，SiO₂纳米颗粒的均匀分散对提高纳米复合材料的拉伸性能起着重要作用。此外，在复合材料中添加1.5重量份的纳米SiO₂，拉伸强度和拉伸模量分别提高了184.1%和217.2%。
