建筑隔震支座用高阻尼胶料配方的研究

Study on High Damping Compound Formulation for Building Isolation Bearing

以天然橡胶(NR)/溴化丁基橡胶(BIIR)并用胶为主体材料制备建筑隔震支座用高阻尼胶料,考察NR/BIIR并用比、炭黑品种和用量以及增粘剂种类对胶料性能的影响。结果表明:减小NR/BIIR并用比,即增大BIIR用量可以有效增大胶料的等效阻尼比,但会降低胶料的强度和形变能力;选用高比表面积的炭黑N220及增大其用量,能够有效增大胶料的等效阻尼比,但炭黑用量增大到一定程度后胶料的强度和形变能力会迅速下降;树脂类增粘剂种类对胶料性能的影响不大,但苯酚乙炔树脂会减小胶料的等效阻尼比。

The high damping compound for building isolation bearings was prepared with natural rubber(NR)/brominated butyl rubber(BIIR)blend as the main material,and the effects of NR/BIIR blending ratio,the type and dosage of carbon black and tackifier type on the properties of the compounds were investigated.The results showed that,the equivalent damping ratio of the compound was improved with the decrease of the NR/BIIR blending ratio,for example,by increasing the dosage of BIIR,but the strength and deformation ability of the compound were reduced.Selecting carbon black N220 which had high specific surface area and increasing its dosage could effectively improve the equivalent damping ratio of the compound.However,when the dosage of the carbon black increased to a certain extent,the strength and deformation ability of the compound would decrease rapidly.The type of resin tackifier had little effect on the properties of the compound,but phenol acetylene resin would reduce the equivalent damping ratio of the compound.