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主要研究了丁腈橡胶(NBR)/聚氯乙烯(PVC)/酚醛树脂(PR)/受阻酚AO60共混体系中PR、AO60和增塑剂癸二酸二丁酯(DS)的用量对硫化橡胶力学性能和阻尼性能的影响。在共混体系中添加不超过50phr的AO60,其硫化胶损耗因子-温度曲线仍呈现单峰特征,体系相容性良好。随着AO60含量的增加,硫化胶的玻璃化转变温度提高,阻尼峰值增大。拉伸强度及动态模量先随之增高,然后降低。随着PR含量的增加,硫化胶的拉伸强度随之增加,tanδ峰值温度升高,而阻尼峰值则先提高后降低。加入增塑剂,硫化胶的力学性能、储能模量及玻璃化转变温度都有不同程度的降低。
The effects of the dosage of PR, AO60 and plasticizer dibutyl sebacate (DS) in NBR / PVC / phenolic resin / hindered phenol AO60 blends on the properties of vulcanizates Mechanical and damping properties. The addition of AO60 not more than 50 phr to the blend system shows a single peak characteristic of the loss factor - temperature curve of the vulcanizates, and the compatibility of the system is good. With the increase of AO60 content, the glass transition temperature of vulcanizates increases and the damping peak increases. Tensile strength and dynamic modulus first increased, then decreased. With the increase of PR content, the tensile strength of vulcanizates increases, the peak temperature of tanδ increases, while the damping peak first increases and then decreases. Adding plasticizer, vulcanizate mechanical properties, storage modulus and glass transition temperature have different degrees of reduction.