The effect of acetone addition on the properties of epoxy
The effect of acetone addition on the properties of epoxy
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DOI：
10.1590/s0104-14282008000100015
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发表时间：
2008-03-01
期刊：
影响因子：
--
通讯作者：
Amico, Sandro C.
中科院分区：
文献类型：
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作者：
Loos, Marcio R.;Coelho, Luiz Antonio F.;Amico, Sandro C.
在这项工作中，使用不同量的丙酮溶解环氧树脂，然后遵循丙酮去除的路线，模拟热固性基质中分散纳米填料的常用方法。分析了残余丙酮对固化过程和环氧树脂性能的影响。结果表明，由于残余丙酮的存在，固化环氧树脂的力学性能受到不利影响，并且试样的脆性断裂较少。傅里叶变换红外光谱和热重分析也被用来表征固化树脂，也表明了少量丙酮的存在。然而，流变学测量表明，在树脂上添加10.0 wt.%的丙酮会导致粘度显著降低（约50%），这可能会促进纳米填料更好的分散。
In this work, a varied amount of acetone was employed to dissolve an epoxy resin and then a route was followed to remove the acetone, simulating a frequently used method to disperse nanofillers in thermoset matrices. Analyses were then carried out to address the influence of residual acetone on the curing process and on the epoxy properties. The results showed a detrimental effect on the mechanical properties of the cured epoxy due to the presence of residual acetone and also a less brittle-like fracture of the specimen. Fourier transform infrared spectroscopy and thermogravimetric analyses were additionally used to characterize the cured resins and have also indicated the presence of a small amount of acetone. Nevertheless, rheological measurements indicated that 10.0 wt.% acetone addition on the resin causes a significant decrease in viscosity (around 50%) which may promote a better dispersion of nanofillers.