Coupling effects of spinodal decomposition and crystallization on mechanical properties of polyolefin blends

Criteria of Process Optimization in Binary Polymer Blends with Both Phase Separation and Crystallization

“…27 Such structure is analogous to a reinforcing network of crystallites, resulting in persistently higher G 0 in H60 than in H70 after the initial nucleation. The micrographs also show that at long isothermal times crystals could grow into PEH-poor phases and fill the volume, consistent with previous experimental observations on this blend 15 and others. 1,5,29 Volume filling by crystals could be advantageous for a larger G 0 .…”

“…[10][11][12][13] For structural materials applications, morphologies of polymer blends resulting from the dynamic interplay between LLPS and crystallization are necessarily related to their mechanical properties. Several recent studies have shown profound effects of sequential LLPS and crystallization on mechanical properties of polyolefin blends, 14,15 whereas the consequences of more industrial-relevant processes of simultaneously occurring LLPS and crystallization remain illusive. In situ rheological monitoring of the phase transformation processes could be a particularly powerful tool for understanding the structure development [16][17][18][19][20][21][22] and eventual process optimization.…”

Liquid‐Crystal Templating in Ammonia: A Facile Route to Micro‐ and Mesoporous Metal Nitride/Carbon Composites

“…Although layered structures have been reported before,35 to the best of our knowledge, this kind of morphology has never been observed in inorganic porous materials. The materials exhibiting the most similar morphology to these are the polyolefin blends reported by Wang et al 36. In their case, the morphology was attributed to liquid–liquid phase separation, and that may also be the explanation here, where phase separation occurs during the polymerization process.…”

Liquid‐Crystal Templating in Ammonia: A Facile Route to Micro‐ and Mesoporous Metal Nitride/Carbon Composites

“…Although layered structures have been reported before, [35] to the best of our knowledge, this kind of morphology has never been observed in inorganic porous materials. The materials exhibiting the most similar morphology to these are the polyolefin blends reported by Wang et al [36] In their case, the morphology was attributed to liquid-liquid phase separation, and that may also be the explanation here, where phase separation occurs during the polymerization process. Figure 3 e,f shows the SEM images of TiN-6, prepared by calcination at 800 8C.…”