The effect of confined crystallization on high-density poly(ethylene) lamellar morphology

Flat-On Secondary Crystals as Effective Blocks To Reduce Ionic Conduction Loss in Polysulfone/Poly(vinylidene fluoride) Multilayer Dielectric Films

“…A similar situation was observed for poly(ethylene oxide). 27,28 However, this is quite different from the confined crystallization of polyethylene 29,30 and polypropylene, 30 where the confining layer thickness needed to be below 30−50 nm to achieve the confinement effect. For the SAXS pattern of the asextruded film (left panel of Figure 3A), scattering from PVDF crystalline lamellae was more or less concentrated in the horizontal direction.…”

Block copolymer compatibilization driven frustrated crystallization in electrospun nanofibers of polystyrene/poly(ethylene oxide) blends

“…[9][10][11][12][13][14][15] The past studies on conned crystallization behaviour of polymers has been done mostly using block copolymers, [18][19][20][21][22][23][24][25][26][27][28][29][30][31] porous anodic alumina (AAO) membrane [32][33][34][35][36][37][38][39][40][41][42] and multilayer thin lms. [43][44][45][46][47][48][49][50][51][52] It must be noted that, in block copolymers, chain connectivity between the two homopolymer blocks additionally inuence the crystallization behaviour. Furthermore, in case of AAO membranes, the polymer lm present on the surface is somewhat tedious to remove and even trace amount of polymers on the surface may leave an imprint of bulk crystallization on the expected conned crystallization behaviour.…”

Three‐dimensional isothermal simulation of PP melt flow in laminating‐multiplying elements based on the finite element method

“…Alternating multilayered coextrusion technology is a simultaneous extrusion process in which two or more polymers are extruded and joined together in special laminating-multiplying elements (LMEs) to form a special hierarchical structure with hundreds and thousands of layers. This hierarchical structure creates a novel structure-property synergy effect that has the unique advantage of producing a composite material with excellent thermal, electrical, barrier, and/or mechanical performance [1][2][3][4][5][6][7][8]. All these interesting properties strongly rely on the uniformity of the layered structure.…”