超分子阻尼硅材料的制备及其宽频域动态力学行为

Preparation of Damping Silastic in Supermolecule and its Dynamic Mechanic Behavior in Broad Frequency Domain

以多乙烯基硅油(PMVS)、9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)为原料制得DOPO-PMVS阻尼剂,将其加入到甲基乙烯基硅橡胶(VMQ)中制得含DOPO的硅橡胶阻尼材料(VMQ/DOPO-PMVS)。研究了不同温度和频率范围内VMQ/DOPO-PMVS的动态力学性能。结果表明,添加该阻尼剂后,VMQ/DOPO-PMVS在测试频率为1 Hz时的损耗因子从0.13提升至0.22,100 Hz时的损耗因子从0.19提升至0.26;在-50~70℃的宽温域内,WLF方程均能与移位因子良好拟合,且VMQ/DOPO-PMVS的储能模量和损耗模量均在对数域内呈线性变化;当温度超过70℃后,VMQ/DOPO-PMVS的储能模量仍基本呈线性变化,而损耗模量出现拐点;Kelvin-SI模型在10^(-4)~10^4 Hz范围内可有效对VMQ/DOPO-PMVS的动态力学性能进行表征。

A DOPO damping material(VMQ/DOPO-PMVS)has been prepared by introducing 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide(DOPO)into polyvinylsilicone oil(PMVS),and then added to the methylvinyl silicone rubber(VMQ).The dynamic mechanical behaviors at different temperatures and frequency scope have been studied.The results show that with the addition of the damping agent,the loss factor of VMQ/DOPO-PMVS at the test frequency of 1 Hz is increased from 0.13 to 0.22,and the loss factor at 100 Hz is increased from 0.19 to 0.26;and WLF equation can fit the shift factor well in the wide temperature range of -50℃ to 70℃.Both the storage modulus and the loss modulus vary linearly in the logarithmic domain at the same time.When the temperature exceeds 70℃,the storage modulus of VMQ/DOPO-PMVS still varies linearly,while the loss modulus appears inflection point.The Kelvin-SI model can be used to describe the dynamic modulus of damping materials in a board frequency range of 10^(4) Hz〜10^(4)Hz.