“Damping Materials based on Liquid Poly(butadienes):Structure-Property Relationships”

摘要

Damping materials are used to reduce or eliminate vibrations and noises mainly in industrial,transportation and structural applications.Several noise and vibration sources exist,such as ambient noise or mechanical vibration.Nowadays,some industries,such as the automotive industry,have developed a multiplicity of solutions to control ambient noise and vibration over the last several decades.They are essential to optimize performance,or to improve personal comfort,health and safety. Today,sound and vibrational damping materials comprising liquid poly(butadiene)resins,such as liquid butadiene homopolymers and copolymers,are manufactured and applied at low temperature,in particular inside car cabins to improve driving comfort.When cured,the latter possess higher damping performances than those of bitumen pads. The present paper highlights the characteristics of liquid poly(butadienes)and the properties of compositions having a real impact on their loss factor curves.By establishing structure-property relationships,it is possible to optimize the damping performances of sulfur-cured compositions containing liquid poly(butadiene)resins. Many industrial sectors wish to reduce their environmental footprint.One technical solution could be the substitution of sulfur-cured systems by another crosslinking agent,such as organic peroxides,in the case of liquid poly(butadiene)resins-based compositions.Indeed,the content of vulcanization agent is reduced while enabling their crosslinking on a large temperature range in order to minimize energy by curing at lower temperatures,or enabling a faster cure step.The shift from sulfur-cured system to peroxide should improve the emission level/damping property balance of damping materials based on liquid poly(butadiene)resins.