Spherulite morphology
WebDec 21, 2002 · Request PDF Spherulite Morphology of Form III Isotactic Poly(1-butene) A means to produce significant proportions of form III of iPBu-1 from the melt and some original features of its ... WebPolymer Morphology. • Morphology is the science of form and structure. It provides the link between the molecular structure and the bulk properties. • As applied to polymers, …
Spherulite morphology
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WebThe morphology and spherulite growth of PLA stereocomplex in linear and branched PLLA/PDLA blends: effects of molecular weight and structure Jun Shao ,* a Yanmei Guo , … WebMay 1, 2016 · Spherulite blend morphology is linked to the competition between radial growth rate G and diffusivity D of the diluent, expressed as the diffusion length δ. …
WebSpherulite Growth: Extended Lamellae • Elongated crystals are formed into twisted ribbonsthat radiate out from the nucleation center of the spherulite. • These ribbons are related to single crystals in their general crystallographic structures, but are significantly more disordered. WebJun 7, 2024 · Different morphologies of Form-II were observed, such as fibrous spherulites [ 13, 23, 24 ], spherulites with dark Maltese cross, and axialite [ 25 ], which were controlled by the content of hard segments of TPU and annealing temperature etc. Müller et al. found that TPU generated axialite as isothermal crystallized at low supercoiling [ 25 ].
WebMar 11, 2010 · The morphology change with the distance from the center of the spherulite caused by the characteristic morphology development is discussed by the results of atomic force microscopy (AFM). 2. Experimental The polymer specimens used in this study were commercial products. Webspherulite: [noun] a usually spherical crystalline body of radiating crystal fibers often found in vitreous volcanic rocks.
WebJan 26, 2024 · X-ray diffraction and transmission electron microscopy were used to characterize the structure and morphology of the g-PBAT/m-LDH nanocomposites. The experimental results show that the m-LDH was exfoliated and widely distributed in the g-PBAT matrix. ... Chen, Y.A.; Hang, Y.T.; Wu, T.M. Polymorphism and spherulite …
WebSep 20, 2004 · Spherulite formation is a very common form of self-assembly observed during polymer crystallization (1, 2), ... Changes in spherulite morphology on drying. ESEM images of a group of spherulites as the pressure is reduced from 5.4 to 4.8 Torr. (A) At 5.4 Torr, a spherulite becomes visible, surrounded by water. Smaller spherulites are apparent ... healthy pets pet insuranceWebAug 19, 2006 · The dark-field studies provide spatial information on the lamellar morphology. Two major types of spherulite morphology have been observed: At high temperatures (low crystallization rate) the dark fields show a preferred orientation of the lamellae along the 020 axis. At low temperatures the preferred orientation is 110. healthy pets plus phone numberWebDec 2, 2024 · Since the performance of a polymer nanocomposite is directly connected with its crystallization and morphology to a certain degree, in this study our attention was … motte\u0027s mechanicalSpherulites are most common in silica-rich glassy rocks. Sometimes they compose the whole mass; more usually they are surrounded by a glassy or felsitic base. When obsidians are devitrified, the spherulites are often traceable, though they may be more or less completely recrystallized or silicified. In the center of a spherulite there may be a crystal (e.g. quartz or feldspar) or sometimes a cavity. Occasionally spherulites have zones of different colors, and while most fr… In polymer physics, spherulites (from Greek sphaira = ball and lithos = stone) are spherical semicrystalline regions inside non-branched linear polymers. Their formation is associated with crystallization of polymers from the melt and is controlled by several parameters such as the number of nucleation sites, structure of the polymer molecules, cooling rate, etc. Depending on those parameters, spherulite diameter may vary in a wide range from a few micrometers to milli… motte \u0026 bailey ann arborWebSpherulites and their growth determine structure of crystalline phase of polymer. The principal features of spherulites are their constant radial growth rate and radial texture. 3 … healthy pets plus discount codeWebScanning electron and transmission optical microscopy indicate that this represents a change-over from spherulite yield to boundary yield, caused by an increased segregation … motte\u0027s mechanical charleston scWebOct 11, 2024 · In terms of improved iPP products, morphology and viscoelastic properties of the blends are essentially important when blended with newer polymers. ... POM was used to investigate the growth of the spherulite in iPP/LMPP blends. The spherulites of the blends were characterized at 120 °C for 15 min isothermally. From Figure 1, ... healthy pets plus coupon code