Development of high damping acrylic rubber/sliding graft copolymer composites

• Published in: RSC advances Vol. 8; no. 63; pp. 36172 - 36180
• Main Authors: Wang, Junjun, Wang, Wencai, Geng, Xiaoyan, Nishi, Toshio, Zhao, Xiuying, Zhang, Liqun
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 01.01.2018; The Royal Society of Chemistry
• Subjects: Acrylic rubber; Chemistry; Crosslinking; Damping; Fourier transforms; Graft copolymers; Hydrogen bonds; Polymer matrix composites; Shear strain; Sliding; Solid phases; Structural analysis
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/c8ra04644a

Aiming at fabricating high damping rubber composites, the acrylic rubber ACM was incorporated with sliding graft copolymer (SGC) materials. SGC is a novel supramolecular material with sliding crosslink junctions, and it acts as a high damping phase in ACM/SGC composites. Fourier transform infrared spectroscopy reveals the presence of two types of hydrogen bonds in ACM/SGC composites. Micro-structure analysis shows a clear sea-island phase structure. SGC particles disperse fairly uniformly in the ACM matrix. A wide interphase region exists between these two phases, indicating the good blend compatibility between ACM and SGC. The damping performance of ACM/SGC composites under dynamic shear strain and frequency condition significantly improved with the increase in SGC content. Specifically, the loss factor (tan  ) value of ACM/SGC (100/40) composite increased by 120% compared with that of neat ACM, according to the RPA results. The significantly improved damping property can be ascribed to the interfacial hydrogen bonds and the pulley effect of SGC molecules.