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Viscoelasticity of a vitrified hindered phenol compound during thermal annealing

机译:玻璃化受阻酚化合物在热退火过程中的粘弹性

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摘要

The viscoelasticity of vitrified 3,9-bis{1,1-dimethyl-2[beta-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]ethyl}-2, 4, 8, 10-tetraoxaspiro [5,5]-undecane (abbreviated as AO-80) during the annealing process was investigated by DMA under the solid shearing model for the first time. The results showed that vitrified AO-80 obtained by quenching from its melting state has super-high damping properties (tan delta > 26), which are much higher than any polymer materials (tan delta < 3). Moreover, the vitrified AO-80 annealed at 80 degrees C under different annealing time has different aggregate structure, resulting in the variation of its viscoelasticity. With the increasing of annealing time the peak value of tan 6 decreased, but still higher than any other polymers. These results also provided the evidences of the damping properties improvement of polymer composites added AO-80. (C) 2007 Elsevier B.V. All rights reserved.
机译:玻璃化的3,9-双{1,1-二甲基-2 [β-(3-叔丁基-4-羟基-5-甲基苯基)丙酰氧基]乙基} -2,4,8,8,10-四氧杂螺的粘弹性[ DMA在固体剪切模型下首次研究了5,5]-十一烷(缩写为AO-80)在退火过程中的作用。结果表明,从熔融态淬火获得的玻璃化AO-80具有超高的阻尼特性(tanδ> 26),远高于任何聚合物材料(tanδ<3)。而且,在不同退火时间,80℃退火的玻璃化AO-80具有不同的聚集体结构,导致其粘弹性变化。随着退火时间的增加,tan 6的峰值降低,但仍高于其他任何聚合物。这些结果也提供了添加AO-80的聚合物复合材料阻尼性能改善的证据。 (C)2007 Elsevier B.V.保留所有权利。

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