The field-dependent complex modulus of magnetorheological elastomers consisting of sucrose acetate isobutyrate ester

Abstract

In this work, epoxidized natural rubber-50 magnetorheological elastomer was synthesized using conventional rubber processing. The ester plasticizer sucrose acetate isobutyrate was then incorporated into epoxidized natural rubber-50 to soften the matrix and to improve the relative magnetorheological effect. The influence of sucrose acetate isobutyrate ester on the microstructures and properties of epoxidized natural rubber-50 magnetorheological elastomers were experimentally investigated. It has been identified that the addition of sucrose acetate isobutyrate ester can reduce the viscosity of the matrix and increase the mobility of magnetic particles in a matrix. The elongation of magnetorheological elastomer was increased by 19%, and the tensile strength was reduced by 17% at 10 wt% content of the sucrose acetate isobutyrate ester. It is observed that the employment of sucrose acetate isobutyrate ester enhanced the thermal stability leading to low degradation of the properties of magnetorheological elastomer. In rheology test, both absolute and relative magnetorheological effects were increased by 0.16 MPa and 23%, respectively, with incorporation of the 7.5-wt% sucrose acetate isobutyrate ester. It is also identified that the storage and loss moduli as well as loss factor are increased as the excitation frequency is increased. It is finally concluded that agglomeration issues in isotropic magnetorheological elastomer which degrade performances of magnetorheological elastomer application devices and systems can be resolved by the addition of sucrose acetate isobutyrate ester to epoxidized natural rubber-50 used in this work.

Thermal Stability and Rheological Properties of Epoxidized Natural Rubber-Based Magnetorheological Elastomer

“…These smart materials have been challenging researchers for many years since their development offered vast possibilities for base material selection. Among other types of MR materials such as MR fluid, MR gel, and MR grease, MR elastomers (MREs) have become a hot topic in MR research due to the high stability and compatibility between the matrix and magnetizable particles [1,2,3,4]. This fact prevents particle sedimentation and leakage issues, which frequently occur when other MR materials are utilized.…”

“…This fact prevents particle sedimentation and leakage issues, which frequently occur when other MR materials are utilized. MRE has unique factors corresponding to field-dependent rheological and mechanical properties that have been investigated extensively [1,2,3,4,5,6,7,8]. In the past decade, these properties contribute to large promising applications for MREs particularly in three main areas known as: (a) vibration and noise control, (b) sensing devices, and (c) actuators [9,10,11,12,13,14,15,16,17,18].…”

An Overview of Durability Evaluations of Elastomer-Based Magnetorheological Materials

“…Ubaidillah et al [92] suggested future investigations will possess ample opportunity to ameliorate the rheological properties of MRE towards device applications. In a particular example, Khairi et al [93] performed experimental work to show that MRE fabrication issues in which degraded rheological performance of MRE can be resolved by incorporating plasticizer into the matrix. Consequently, the improved properties of MRE will be validated by adopting application devices for future investigation.…”

Characterization of T-shaped magneto-rheological brake

“…MRs are classified as semi-active materials be-cause of only their properties were changed [1]. There are many types in MRs, including magneto-rheological fluid (MRF) that liquid phase, magneto-rheological elastomer that composite of elastomer and magnetic particle-like Waste Tire Rubber (WTR) [2] and natural rubber [3], magneto-rheological foam that foam-based and magneto-rheological gel that has a gel form.…”