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以丁腈橡胶(NBR)为基体,添加受阻酚小分子2,2′-亚甲基双-(4-甲基-6-叔丁基苯酚)(AO-2246)构成杂化体系,在体系中添加片状石墨粉(FGP),研究其对共混物动态力学性能的影响,借助DMA、FTIR和SEM等手段,研究了FGP/AO-2246-NBR共混物的动态力学性能。结果表明:将FGP加入AO-2246-NBR共混物中后,损耗角正切值、动态储能模量及损耗模量均随着FGP含量的增加先增加后减小,当FGP含量达到临界值(质量分数10%左右)时,其动态力学性能损耗角切值、动态储能模量及损耗模量才表现出较好的性能。通过红外光谱分析发现,三元共混物的氢键效应不是决定动态力学性能的关键因素,这与FGP本身的特性及形成的微观结构有关。微观形貌的形成是FGP与AO-2246-NBR共混物间相互作用的结果。
Using NBR as matrix, 2,2’-methylene bis- (4-methyl-6-tert-butylphenol) (FGP) was prepared to investigate its effect on the dynamic mechanical properties of blends. The dynamic mechanical properties of FGP / AO-2246-NBR blends were investigated by means of DMA, FTIR and SEM. The results showed that the loss tangent, the dynamic storage modulus and the loss modulus increased with the increase of FGP content and then decreased with the addition of FGP to AO-2246-NBR blends. When the FGP content reached the critical value (Mass fraction of about 10%), the dynamic mechanical properties loss tangent cut, dynamic storage modulus and loss modulus showed good performance. Through infrared spectroscopy analysis, it was found that the hydrogen bonding effect of ternary blends is not the key factor to determine the dynamic mechanical properties, which is related to the properties of FGP and the microstructure formed. The formation of micro-morphology is the result of the interaction between FGP and AO-2246-NBR blends.