Abstract
AbstractThe vibration damping efficiency of the IPN‐laminated steel sheet, which consisted of a viscoelastic IPN layer sandwiched between two steel sheets, was investigated in this study. The simultaneous semi‐IPN used included an elastomeric urethane phase and a glassy acrylate phase. This study seeks to develop a laminate, with broader damping temperature and frequency ranges, in contrast to the homopolymer‐based laminates studied previously. A vibration damping analysis of the neat IPNs was first conducted using a dynamic rheometer in order to provide basic rheological properties of the neat IPNs. This was followed by the frequency spectrum analysis of the IPN‐based laminates, using a frequency analyzer, utilizing the results derived from the damping analysis of the neat IPNs. The IPN variables studied included the reaction temperature, the amount of the catalyst for urethane phase, the composition in acrylate phase and in urethane phase, and the composition of IPN. The results indicated that, by properly adjusting the IPN parameters, the extent of phase separation in IPN could be controlled. The effect of the network formation in the catalyzed urethane phase on the damping properties of IPNs was also investigated and the possible reaction mechanism was analyzed. The IPNs with catalyzed urethane phase showed single, smooth damping curves with peak values of tan δ = 0.4–0.7 in a broad temperature range. The study was then extended to the analysis of the vibration damping efficiency of the IPN‐based laminated, including the effect of IPN composition, the effect of the urethane composition in IPN, and the effect of the acrylate composition in IPN. The results indicated that the IPN‐based laminates yielded a maximum loss factor in the range of 0.1–0.5, which was below the tan δ value of IPN, but was better than that of the neat steel sheet. In addition, most of the damping properties of the laminates could be derived or predicted from the dynamic rheological properties of the neat IPNs. Thus, knowing the basic dynamic rheological properties of the neat IPNs is vital for a successful design and application of the IPN‐laminated steel sheet. © 1992 John Wiley & Sons, Inc.
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.
