epoxy resinkineticsFTIRactivation energy用傅立叶变换红外光谱(FTIR)法研究了双酚A二缩水甘油醚环氧树脂(DGEBA)用低代端氨基聚(酯-胺)树枝状大分子G1.0(NH2)3,G1.5(NH2)8和聚(胺-酰胺)树枝状大分子PAMAM1.0(NH2)4作为固化剂的等温固化动力学,得到了不同温度下转化率与固化时间及反应速率与固化时间的关系.与...
We followed each by temperature and the variation of the area of the epoxy infrared band (912-916 cm-1) versus time. The results showed that the mechanism was complex and depended on the acid composition in the copolymer. Three types of reaction were involved: addition esterification, ...
Being too fragile for cutting and polishing without treatment, the samples were initially consolidated with epoxy resin. All the samples were then mounted as blocks, ground, polished with 0.25 micron diamond paste, and carbon coated prior to SEM analysis. The acceleration voltage was set at 20 ...
Generally, epoxy resin is the most common industrial thermosetting resin product, while poly(methyl methacrylate)-PMMA is a common thermoplastic resin and is used widely in biomaterial applications [10,11], where these different types of thermoplastic resins are used to improve the performance of ...
Epoxy coating on Al - near normal reflectance °Cured at 100c overnight Difference 博 博精精儀儀器器 Page 35 Specular Reflection 正反射 樣品表面光滑面有機物 • 95% 穿透, 5%反射 Dependent upon refractive index (n) and absorptivity (k) Corrected using Kramers-Kronig (KK) 95 % 100 % 5%...
Analysis of the chemical structure with FTIR also indicate that the silane epoxy resins polymeric materials after 60 weeks aging, compared with new materials and the chemical structure are not change. 展开 关键词: silane epoxy resin SEM FTIR ...
Fig. 11. Cure rate plotted against conversion: simultaneous DSC/FTIR: FTIR conversion of the epoxy group and DSC/FTIR: DSC conversion of the epoxy group at 60 °C. Fig. 12 shows the natural logarithm of the reaction constants plotted against reciprocal temperature (1/T). Error bars of 5%...
For ATR-FTIR analyses, apatite specimens with euhedral crystal habits were cut parallel and perpendicular to the optical c-axis, embed- ded in 1-inch epoxy mounts, and subsequently stepwise pol- ished from 6 to 1 μm with diamond paste. For each sample, randomly orientated pieces of the...
Based on the above, now disposal of the used masks can be divided into two groups: masks produced in the medical sector (workers in hospitals and isolation units) and masks produced by ordinary people [21]. The first group is disposed of as medical waste, and the second group, ...
The Transport of Water in a Tetrafunctional Epoxy Resin by Near-Infrared Fourier Transform Spectroscopy. Polymer 2000, 41, 565–574. [Google Scholar] [CrossRef] Elabd, Y.A.; Baschetti, M.G.; Barbari, T.A. Time-Resolved Fourier Transform Infrared/Attenuated Total Reflection Spectroscopy for...