Styrene‐ethylene/butylene‐styrene blends for improved constrained‐layer damping

Abstract

ABSTRACT:The influence on the adhesion to some metal surfaces and the damping properties of various modified styrene-ethylene/butylene-styrene (SEBS) materials was evaluated. Modification of the different phases of the SEBS with resins was shown to have a large effect on the damping properties of the polymers, which were evaluated by dynamic mechanical analysis (DMA). A small amount of maleic anhydride grafted onto the EB block was found to lead to a significant improvement in the adhesion of the polymer to some metal surfaces without affecting the damping properties of the polymers. The results of the DMA tests on the polymers were used to calculate the composite loss factor (CLF) for a steel laminate, which consisted of two steel plates with a polymeric layer in between, according to the theory proposed by Ross, Ungar, and Kerwin. The calculated results were compared with the measured CLFs determined in vibrating beam tests (VBTs). The agreement between the calculated and measured values was quite fair, provided that the DMA values used for the calculations were recalculated to the actual higher frequencies used in the VBTs, using the timetemperature superposition principle.

Carboxyl‐terminated butadiene acrylonitrile rubber/epoxy polymer alloys as damping adhesives and energy absorbable resins

“…In particular, CTBN/epoxy including CTBN with AN 26 mol % indicated the highest loss factors among 4 steel laminates. The loss factors were over a requirement for damping (Z ¼ 0.1) 2,17,18 at several resonant frequencies. Figure 8 shows the loss factors at the first resonant points of steel laminates as a function of the environmental temperatures.…”

“…The molecular motion and the friction of polymer chains convert given mechanical energy into thermal energy and dissipate it as heat release. 2 Homopolymers have narrow glass-transition regions, which cause the narrow temperature range with damping performance. One way to broaden the glass-transition regions is using polymer blend.…”

Dynamic properties of rubber vibration isolators and antivibration performance of a nanoclay‐modified silicone/poly(propylene oxide)–poly(ethylene oxide) copolymer with 20 wt % LiClO4 blend system

“…However, the polymer material's inherent sustaining strength usually cannot satisfy the antivibration structural design. Thus, in the earlier studies of Kerwin,13 Ungar and Beranek, 14 Weibo and Fengchang, 5 Oborn et al, 11 and Yamada et al, 12 a sandwich structure of a polymer/steel laminate was used to increase the stiffness of the polymer damping material. Some research also used blended fillers 5,[15][16][17] and fibers 18 -22 in polymers to enhance their stiffness and antivibration performance.…”

Damping analysis of polyurethane/polyacrylate interpenetrating polymer network composites filled with graphite particles

“…In practice, it is hoped that an IPN material has a high loss factor (tan δ ≥ 0.3) over wide temperature and frequency ranges [1, 5], while the damping mechanism of pure IPNs only relies on the interaction between polymer chains. It is reported that inorganic fillers has effectively broadened temperature range and increased tan δ value [6, 7]. Trakulsujaritchok and Hourston [8] found that the addition of silica increases the maximum tan δ value of PU/PEMA IPNs from 0.44 to 0.72.…”