This study investigated the effect of polyethylene glycol (PEG) and nanosilica (NS) on the physical-mechanical properties and cure kinetics of diglycidyl ether of bisphenol-A-based epoxy (DGEBA-based EP) resin. For this purpose, tensile and viscometry tests, dynamic mechanical thermal analysis (DMTA), and differential scanning calorimetry (DSC) were carried out under dynamic conditions. The results showed that adding NS and PEG enhances the maximum cure temperature as well as the heat of cure reaction () in EP-NS, while it decreases in EP-PEG and EP-PEG-NS. The cure kinetic parameters of EP-PEG-NS were calculated by Kissinger, Ozawa, and KSA methods and compared with each other. The calculated from the Kissinger method (96.82 kJ/mol) was found to be lower than that of the Ozawa method (98.69 kJ/mol). Also, according to the KAS method, the apparent was approximately constant within the 10-90% conversion range. Tensile strength and modulus increased by adding NS, while tensile strength diminished slightly by adding PEG to EP-NS. The glass transition temperature () was calculated using DMTA which was increased and decreased by the addition of NS and PEG, respectively. The results of the viscometry test showed that the viscosity increased with the presence of both PEG and NS and it prevented the deposition of solid particles.

中文翻译：

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PEG /纳米二氧化硅/环氧树脂复合材料的动态固化动力学和物理机械性能

这项研究调查了聚乙二醇（PEG）和纳米二氧化硅（NS）对双酚A基环氧树脂（DGEBA基EP）树脂的二缩水甘油醚的物理力学性能和固化动力学的影响。为此，在动态条件下进行了拉伸和粘度测试，动态机械热分析（DMTA）和差示扫描量热法（DSC）。结果表明，添加NS和PEG可以提高EP-NS的最高固化温度以及固化反应的热量（），而在EP-PEG和EP-PEG-NS中则降低。EP-PEG-NS的固化动力学参数通过Kissinger，Ozawa和KSA方法计算并相互比较。的由基辛格法（96.82kJ / mol）计算的结果低于小泽法（98.69kJ / mol）。另外，根据KAS方法，表观在10-90％的转化率范围内近似恒定。加入NS可以提高拉伸强度和模量，而向EP-NS中添加PEG可以使拉伸强度稍微降低。使用DMTA计算玻璃化转变温度（），该温度分别通过添加NS和PEG升高和降低。粘度测试的结果表明，粘度随着PEG和NS的存在而增加，并且阻止了固体颗粒的沉积。