受阻酚类材料在橡胶中的应用
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摘要
研究了受阻酚类添加剂对NR/BR并用胶硫化特性、力学性能、老化特性以及动态力学性能的影响。结果表明:加入双酚类受阻酚添加剂,并用胶的t_(10)和t_(90)增加,ML变化很小,M_H减小,模量下降;硬度和回弹性下降,100%定伸应力和拉断伸长率先略微增加然后减小,拉伸强度和撕裂强度下降;100℃热空气老化24 h后,拉伸强度保持率和拉断伸长率保持率都有一定程度提高,耐热空气老化性能改善;玻璃化转变区tanδ减小,0℃以上tanδ增加,0～80℃温度范围内材料阻尼性能得到改善。
The effects of hindered phenolic additives on vulcanization, mechanical properties, aging properties and dynamic mechanical properties of NR/BR blended were investigated. The results show that with the addition of the bisphenol-based hindered phenol additive, the t10 and t90 of the blended rubber increased, the ML changed little, the MH decreased, and the modulus decreased. The hardness and rebound resilience decreased, and the 100% modulus and elongation at break first increased slightly and then decreased, and the tensile strength and tear strength decreased. After aging at 100 ℃ for 24 h, the tensile strength retention rate and the elongation at break retention rate were improved to some extent, and the heat-resistant air aging performance was improved. The tanδ in the glass transition section was reduced, and the tanδ was increased above 0℃, material damping performance was improved at the temperature range of 0℃ ～ 80℃.
The effects of hindered phenolic additives on vulcanization, mechanical properties, aging properties and dynamic mechanical properties of NR/BR blended were investigated. The results show that with the addition of the bisphenol-based hindered phenol additive, the t10 and t90 of the blended rubber increased, the ML changed little, the MH decreased, and the modulus decreased. The hardness and rebound resilience decreased, and the 100% modulus and elongation at break first increased slightly and then decreased, and the tensile strength and tear strength decreased. After aging at 100 ℃ for 24 h, the tensile strength retention rate and the elongation at break retention rate were improved to some extent, and the heat-resistant air aging performance was improved. The tanδ in the glass transition section was reduced, and the tanδ was increased above 0℃, material damping performance was improved at the temperature range of 0℃ ～ 80℃.
引文
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[2]温晓葵,陈兰辉.硫代受阻酚类抗氧剂的应用发展情况分析[J].化工管理,2013(14):217~217.
[3]郭华.抗氧剂在聚苯乙烯中的应用研究[D].沈阳工业大学,2015.
[4]汪明天,王伟,彭泽友,等.有机小分子AO-80对橡胶阻尼性能的影响[J].特种橡胶制品,2013(5):13~15.
[5]杨泽荣.受阻酚改性聚合物阻尼材料的制备与性能[D].北京化工大学,2010.
[6]张东岳,陈思,付廷伟,等.受阻酚AO-80/混炼型聚氨酯复合材料的制备及阻尼性能研究[J].橡胶工业,2013,60(9):543~546.
[7]赵秀英,郭长明,张东岳,等.受阻酚AO-80/氯化丁基橡胶/丁腈橡胶复合材料的制备及阻尼性能[J].合成橡胶工业,2014,37(1):42~46.
[8]张永鹏,陈俊,郭绍辉,等.受阻酚类抗氧剂的研究进展及发展趋势[J].塑料助剂,2011(3):1~7.
[9]李静,赵秀英,肖大玲,等.受阻酚AO-80/改性白炭黑/NBR复合材料的性能[J].橡胶工业,2009, 56(5):267~271.
[10]肖大玲,刘俊杰,赵秀英,等.聚合物基阻尼材料的研究进展[J].橡胶工业,2010,57(2):121~127.
[11]赵秀英,向平,张立群.受阻酚/丁腈橡胶复合材料的结构与性能[J].复合材料学报,2007, 24(2):44~49.
[12]赵云峰,张继华,游少雄,等.丁腈橡胶/酚醛树脂/受阻酚AO80三元阻尼橡胶的结构与性能[J].航空材料学报,2009,29(3):71~77.