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Showing 1 to 20 of 137 for “"Lamellae"”.
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Understanding of the mechanical response of semicrystalline polymers based on the block-like substructure of crystalline lamellae
… the coupling and slips of blocks as well as lamellae. 2.the critical strain at C reflects a property of the amorphous phase. It is the maximum elasticity of the ideal semi-crystalline polymer system. At point C, a critical stress is reached which destroys the lamellar crystallites, followed …
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Strain relaxation in TEM lamellae probed by 4D-STEM: from projected strain to dynamical-diffraction-based reconstruction of composition
… but it relies on thin, electron-transparent lamellae. In such lamellae, the tetragonal distortion established during epitaxial growth partially relaxes at the free surfaces created during specimen preparation. The resulting three-dimensional strain field breaks the direct link between …
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Novel polypropylene based microporous membranes via spherulitic deformation
… melt processing condition. A tangential lamellae-rich spherulite was created and identified with a positive birefringence sign. A sequential annealing process improved the crystalline structure, and in particular the thickness of the tangential lamellae. The annealing process proved to be …
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Morphology, Crystallization and Melting Behavior of Statistical Copolymers of Propylene with Ethylene, 1-Butene, 1-Hexene and 1-Octene
… is consistent with the melting of parent a-phase lamellae and alpha or gamma-phase daughter lamellae. For PH and PO copolymers it is very similar to that observed for ethylene-octene(EO) and ethylene-styrene(ES) copolymers and compatible with the melting of primary lamellae and secondary mosaic or …
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Feeding morphology of juvenile Utterbackia imbecillis (Bivalvia:Unionidae)
… at the posterior margin of the developing gill lamellae. As the juveniles grew, interfilamentary ciliary connections appeared at the tips of the filaments, to be followed by formal tissue connections. Subsequently the lamellae of each side of the animal joined at their ventral margins forming a …
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Self-assembly of silicon-containing triblock copolymer and terpolymers
… morphologies such as spheres, cylinders, and lamellae depending on the block volume fraction, more complex polymer architectures are expected to offer additional degrees of freedom and a wider range of structures. Solvent vapor annealing (SVA) using a continuous gas flow system allows a …
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Effects of vanadium microalloying of 1080 steel on pearlite transformation kinetics and microstructural development
… 2.6 nm, to form randomly within the ferrite lamellae in samples transformed at 650 °C. No clustering was detected by APT within samples transformed at 550 and 600 °C. Proeutectoid grain boundary ferrite formation was observed to be promoted by the addition of V and proeutectoid grain boundary …
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Deformation and Transformation Mechanisms of Polybutene and Poly(vinylidene Fluoride)
… upon the orientation of the original crystalline lamellae comprising the spherulites with respect to the draw direction. Deformation of fresh PB thin film is accompanied by a transformation of tetragonal form to hexagonal form. Potassium permanganate etching and dark field microscopy of fresh …
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Periocular malignancy.
… must replace both the anterior and posterior lamellae with similar tissues. Reconstruction should be approached in a conceptual manner which considers the numerous options for both posterior and anterior lamellae and the variety of combinations which result. Treatment should be individualized …
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Size effects on self-assembly and melting of silver-alkanethiolate on inert surfaces
… are initially small and can ripen into large lamellae during thermal annealing. The crystals have facets and flat terraces with extended area, and have a strong preferred orientation in parallel with the substrate surface. The MPCs move laterally upon annealing and reorganize into a …
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Structure-Property Relationships of Flexible Polyurethane Foams
… time in typical polyurethane foam systems, of lamellae-like polyurea structures ca. 0.2 mm long and ca 5-10 nm across. Aggregations of these lamellae-like hard domains may be the polyurea balls typically observed via TEM. Diethanolamine, a widely used cross-linking agent in molded foams, was …
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Block copolymer self-assembly and templating strategies
… have a variety of bulk geometries (alternating lamellae, gyroids, cylinder or sphere arrays, tiling patterns, core-shell structures) depending on the molecular architecture of the polymer and the volume fraction of its blocks. And in thin films, surface interaction and commensurability effect …
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Anomalous diffusion in anisotropic media
… the first consisting of crosslinked flat lamellae in anisotropic hydrogels and the second consisting of spherically bent lamellae in multilamellar vesicles. In the third system, a swollen PDMS network, obstructed diffusion was investigated in the fractal topology. <br> <br>Anisotropic …
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Network morphologies in monodisperse and polydisperse multiblock terpolymers.
… Fddd network) is identified between two-domain lamellae (LAM2) and three-domain lamellae (LAM3) in OSISO materials. This sequence of morphologies was previously reported in ISO triblocks with comparable compositions. Mechanical tensile testing reveals that an OSISO sample with a lamellar …
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Microfluidic Study of Gravity-Driven Drainage and Coalescence of Aqueous Two Dimensional Foams
… each other, and leads to the formation of thin lamellae, which break and cause the coalescence. The second is the mass transfer of the dispersed phase through the continuous phase, which is caused by the difference in pressures between the bubbles and droplets due to their size differences. This …
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Critical size for bulk-to-discrete transition and segment-induced size effect melting of 2D aliphatic layers
… to synthesize well-defined single crystal lamellae of different chain lengths (n=1-16), with all-trans alkyl chains, well-registered interfaces and highly ordered intralayer lattice. This technique is highlighted by the growth of extremely short chain lamellae (n=1-3), which is previously …
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The Effects of Glochidiosis on Fish Respiration
… of the gill filaments and obliterates the Lamellae in the affected area, increasing diffusion distance while reducing the surface area for gas exchange. Fingerling bass (̃5 g) were infected with 0-1006 glochidia per fish. In normoxic water, resting ventilation rates were elevated in …
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Effect of Age on the Structure of Meissner Corpuscles in Forepad Digital Pads of Mice
… more horizontally arranged terminals, associated lamellae and connective tissue. At old age (18-26 months), corpuscles became small and lobulated, appearing disorganized. There was no loosening of the corpuscle-epidermal interface. An increase in collagenous connective tissue and basal lamina …
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Axial patterning of the chondrichthyan pharyngeal endoskeleton and the origin of the jaw
… arch muscle progenitors, and of developing gill lamellae. Finally, it has been historically speculated that the chondrichthyan pseudobranch derives from the hyoid (i.e. 2nd pharyngeal) arch. I demonstrate here, by cell lineage tracing, that the pseudobranch is, in fact, mandibular arch derived, …
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Crystalline Morphologies of Poly(butadiene)-b-Poly(ethylene oxide) Block Copolymers in n-Heptane
… The meander morphology consisting of branched lamellae with a crystalline PEO ribbon-like core and ellipsoidal endings was observed for the first time in solution. Investigations of the crystal development revealed that this structure formed via crystallization-induced aggregation of spherical …
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