PDF(Pubmed)
Abstract：
The effect of different contents of fullerene on the properties of polyurethane resins (PUs), including rheology and thermal properties, was investigated. Polyurethane resins were prepared through polyaddition reactions using different isocyanate monomers such as isophorone diisocyanate (IPDI), methylene diphenyl diisocyanate (MDI), hexamethylene diisocyanate (HDI), and different polyols, such as poly(oxytetramethylene) glycol (PTMG), the triol trade name FA-703, and polypropylene glycols (PPG), at an NCO/OH ratio 0.94 and a temperature of 100 °C. IR spectroscopy was used to control the polymerization of PUs through the shifting of NCO peaks. The results showed that the rheology and thermal properties of the prepared PU resins depend on the type of isocyanates and fullerene used. Based on the type of isocyanates, the PU resin prepared by MDI has the highest viscosity and thermal stability compared to the other isocyanates investigated. On the other hand, the PU resins prepared by IPDI mixed with fullerene had the highest viscosity and thermal stability. However, the initial decomposition temperature (T onset) of the PUs decreased with the addition of fullerene without affecting the maximum decomposition temperature (PDT max) of the PU resin.
摘要：
不同含量的富勒烯对聚氨酯树脂性能的影响,包括流变学和热性能，被调查。使用不同的异氰酸酯单体如异佛尔酮二异氰酸酯(IPDI)通过加聚反应制备聚氨酯树脂,亚甲基二苯基二异氰酸酯(MDI),六亚甲基二异氰酸酯(HDI),和不同的多元醇，如聚(氧四亚甲基)二醇(PTMG)，三醇商品名FA-703和聚丙二醇(PPG)，在NCO/OH比为0.94和100°C的温度下。IR光谱用于通过NCO峰的移动来控制PU的聚合。结果表明，制备的PU树脂的流变性和热性能取决于所使用的异氰酸酯和富勒烯的类型。根据异氰酸酯的类型，与所研究的其他异氰酸酯相比，MDI制备的PU树脂具有最高的粘度和热稳定性。另一方面,IPDI与富勒烯混合制备的PU树脂具有最高的粘度和热稳定性。然而,在不影响PU树脂的最大分解温度(PDTmax)的情况下,PU的初始分解温度(T开始)随着富勒烯的添加而降低。
