Preparation and intermolecular interaction of bio-based elastomer/hindered phenol hybrid with tunable damping properties

Abstract

In this research, crosslinked hybrids of a newly invented bio-based elastomer poly(di-isoamyl itaconate-co-isoprene) (PDII) and 3,9-bis[1,1-dimethyl-2{β-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5,5]-undecane (AO-80) were designed and prepared by the mechanical kneading of the PDII/AO-80 hybrids at a temperature higher than the melting point of AO-80, followed by the crosslinking of PDII during the subsequent hot-pressing/vulcanization process. The microstructure, morphology, and mechanical properties of the hybrids were systematically investigated in each preparation stage by using DSC, FTIR, XRD, SEM, DMTA, and tensile testing. Part of the AO-80 molecules formed an AO-80-rich phase, but most of them dissolved in the PDII to form a very fine dispersion in amorphous form. The results of FTIR and DSC indicated that strong intermolecular interactions were formed between the PDII and the AO-80 molecules. Each PDII/AO-80 crosslinked hybrid showed a single transition with a higher glass transition temperature and significantly higher loss value (tan δ) than the neat PDII because of intermolecular interactions between the PDII and the AO-80 molecules. For instance, tan δ of PDII/AO-80 consisting of 100 phr AO-80 achieved 2.6 times as neat PDII. The PDII/AO-80 crosslinked hybrids with applicability at room temperature are potential bio-based damping materials for the future.

Mechanical and Damping Properties Analyses of Small Molecular Modifiers/Nitrile‐Butadiene Rubber Composite: Molecular Dynamics Simulation

“…The hindered phenol was properly dissolved in the NBR/PVC matrix, and the composites showed a higher glass transition temperature. Zhou et al [19] investigated crosslinked hybrids of poly(di-isoamyl itaconate-co-isoprene) (PDII) and AO-80 hybrids. PDII and AO-80 have good compatibility, and the addition of AO-80 greatly improved the damping performance of the composite.…”

“…Zhou et al. [ 19 ] investigated crosslinked hybrids of poly(di‐isoamyl itaconate‐ co ‐isoprene) (PDII) and AO‐80 hybrids. PDII and AO‐80 have good compatibility, and the addition of AO‐80 greatly improved the damping performance of the composite.…”

Itaconate Based Elastomer as a Green Alternative to Styrene–Butadiene Rubber for Engineering Applications: Performance Comparison

“…Due to its unique high elasticity and large deformation capacity, rubber materials have become irreplaceable in many fields, such as the tire industry [1][2][3], sealing industry [4], as well as the damping and shock absorption industry [5][6][7]. The annual consumption of rubber worldwide exceeds 20 million tons.…”