A relative study of the effect of static and dynamic vulcanization upon shape memory nature of thermally actuated peroxide crosslinked polyolefinic blends

Abstract

Thermally actuated peroxide crosslinked shape memory polyolefinic blends of EOC and EPDM has been developed. Effect of static and dynamic vulcanization process on the shape memory character has been pursued in detail. Shape memory properties study at 60°C reveals that statically vulcanized blend and dynamically vulcanized blend are superior in terms of shape fixity character and shape recovery behavior, respectively. Breakage of lower percentage of crystalline structure gives higher percentage of shape fixity for the statically vulcanized blend. In a parallel way, statically vulcanized blend shows better stress–strain properties also. On the other hand, higher degree of crosslinked network structure results higher shape recovery percentage for the dynamically vulcanized blend. Similar to shape recovery characteristics, dynamically vulcanized blend shows better thermal stability and higher percentage of gel content.

Exploring the thermomechanical properties of peroxide/co‐agent assisted thermoplastic vulcanizates through temperature scanning stress relaxation measurements

“…More considerable improvement in the elastic recovery has been observed for ZMA and ZDMA, which was expected from the other results. [ 28 ] Higher the initial modulus value proves the more strength of the sample and it has been also observed in the strain sweep. These behaviors are also reflected in the nature of the intercept and the slope value mentioned in Figure 9 and Table 3.…”

“…TSSR measurement data reflected on mechanical properties and from cross‐link density data trend mechanical properties also can be correlated. [ 4, 28 ]…”

Influence of different mixing sequence on UHMW‐EPDM based thermoplastic vulcanizates: Mechanical, rheological and morphological characteristics

“…Since, the PP phase is less etched out from the TPV matrix due to the peroxide master batch preparation and due to some agglomeration, cloudy type morphology has been observed, depicted in the Figure 10P1. There is not much difference between the sample B1 and T1, lamellar and spherical type morphology has been observed 37–41 …”

“…There is not much difference between the sample B1 and T1, lamellar and spherical type morphology has been observed. [37][38][39][40][41] In the case of the sample C1 (Figure 10C1), the droplet type morphology formed and the domain sizes are smaller than the other samples. One of the important thumb rules of the TPV morphology is that, for the smaller and equipoised particle size of the crosslinked rubber phase the mechanical properties will be better.…”

Quantitative detection of polymer content in styrene‐butadiene‐styrene modified asphalt after aging

“…[11] SBS modifier swells by absorbing the light components in the base asphalt to form a network structure. [12,13] Currently, there is still no professional technology to remove SBS modifiers from modified asphalt, which can only indirectly reflect SBS content from its physical properties. [14] Therefore, developing a method for rapid detection of SBS content is critical.…”