Abstract
The dynamic mechanical property of silicone rubbers with different phenyl units and phenyl contents were comprehensively investigated by means of experiments combined with molecular dynamics (MD) simulation. Experimentally, the results indicate that the phenyl units are randomly distributed in the polymer chains and the damping capacity is considerably improved with the augment of phenyl contents. Compared with methylphenyl units, diphenyl units endow the silicone rubber with enhanced mechanical stability, which leads to a wider glass transition region and effective damping temperature range. Furthermore, the MD simulation reveals the equilibrium structures and local dynamics by monitoring the changes of molecular interactions, bond rotation, conformational transition and molecular diffusion during the cooling process, which correlates the dynamic mechanical response to the molecular relaxation behavior. This work provides a deeper insight into the relationship among the composition, microstructure and damping property, which may promote theoretical predictions and scientific basis for the designs of silicone rubber with desired performances.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
