Crystallization behavior of high-density polyethylene in an oriented blend with polypropylene

Mechanistic Investigation into the Unique Orientation Textures of Poly(vinylidene fluoride) in Blends with Nylon 11

“…Until now, there have been some reports about the unique orientation textures in some biconstituent fibers [12,13] and polyolefin blends. [14,15] Epitaxial crystallization has been mainly used to interpret these new crystal orientation textures. However, our self-seeded experiments exclude the possibility of epitaxial crystallization of PVDF on the surface of nylon 11.…”

“…[2][3][4][5][6][7][8][9][10] The orientation and crystallization behaviors of some crystalline/crystalline polymer blends have been investigated. [11][12][13][14][15][16][17][18] A component with a lower melting temperature is melt-crystallized in the oriented matrix of the other component having a higher melting temperature. Multi-axially oriented materials can be obtained by this method, and the materials show some unique mechanical properties, as compared with an as-stretched sample.…”

Unique Orientation Textures Induced by Confined Crystal Growth of Poly(vinylidene fluoride) in Oriented Blends with Polyamide 6

“…A number of studies have been reported on the oriented crystallization of immiscible, but mechanically compatible, polymer blends consisting of two crystalline polymers, such as poly(propylene) (PP)/polyethylene (PE), [7][8][9] PP/ isotactic poly(butene-1), [10] PP/polyamide 11, [11] polyethylene glycol (PEG)/polyamide, [12] PCL/PE, [13] and poly(vinylidene fluoride)/polyamide 11. [14,15] If a component with a lower melting temperature is crystallized in the oriented matrix of another component with a higher melting temperature, some unusual orientation textures, such as orthogonal orientation, [8,10,11,14,15] or tilted orientation, [7][8][9]11] are induced in the dispersed phase.…”

“…[14,15] If a component with a lower melting temperature is crystallized in the oriented matrix of another component with a higher melting temperature, some unusual orientation textures, such as orthogonal orientation, [8,10,11,14,15] or tilted orientation, [7][8][9]11] are induced in the dispersed phase. The unique orientation behaviors have been explained either by epitaxial crystal growth on the polymer crystal, [11][12][13] thermal shrinkage stress, [7] or transcrystallization. [10,14,15] The compatibility between two components in a blend should have important effects on the orientation behavior and the mechanical properties.…”

“…Up to now, epitaxial crystallization, [11][12][13] thermal shrinkage stress, [7] and transcrystallization [10,14,15] have been used to interpret some new crystalline textures formed in some other blends. The possibility of an epitaxial crystallization of PVDF on the surface of PA6 is ruled out because there is no evidence of lattice matching between the PVDF and PA6 crystals.…”