Spherulite morphology
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. WebFeb 2, 2024 · The results demonstrated that proper crystallization conditions (a small spherulite size, a crystallinity of 6%, and rapid crystallization ability) could virtually contribute to the optimized cellular structure with the highest cell density of 4.36 × 10 6 cell/cm 3.
Spherulite morphology
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WebAbstract. Crystalline ‘spherulites’ grown in ultra-thin films of natural rubber at − 26° C were examined in the electron microscope. The spherulites form hollow domes, like blisters in … WebApr 10, 2024 · As the stretching forces increased, the crystallization ability and orientation degree of PP crystals improved significantly. Differential scanning calorimetry and polarizing optical microscopy confirmed the formation of PP spherulite, fan-shaped lamellae and a transcrystalline layer under the induction of the PA6 phases with different morphology.
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, … WebMay 8, 2015 · An unusual spherulite morphology consisting of an eye-like region surrounded by a normal region was found in concentrated cellulose solutions in the ionic liquid …
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.
WebAug 20, 2024 · The morphology of semicrystalline plastics on the 1-100 μm scale, such as spherulites, strongly affect mechanical and other properties of the material but currently only 2D imaging techniques are ...
WebDec 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 … spicer 211750 1x center bearingWebJun 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 ]. spicer 2-4-5341WebMay 8, 2015 · An unusual spherulite morphology consisting of an eye-like region surrounded by a normal region was found in concentrated cellulose solutions in the ionic liquid AmimCl, especially in the presence of 0.5 wt% MWCNTs. In comparison with the normal region, the eye-like region had a different growth rate and different morphology, such as ... spicer 2421WebOct 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, ... spicer 3021WebIn this work, the formation mechanism of two categories of spherulite was studied in a supercooled nitroguanidine (NQ) aqueous solution with a small amount of gelatin. It is proposed that spherulitic growth depends on the initial morphology of the crystallite, wherein the gelatin concentration, temperature, and initial supersaturation play a ... spicer 232485WebA spherulitic morphology was observed at low LPC concentrations, but its formation was inhibited at concentrations of lipid typically used in the LPC test. Spherulites in heated mung bean starch were obtained for a wide range of cooling rates (2.5-250C/min) provided the system was first heated to 180C and then cooled below 65C. spicer 25110586WebApr 10, 2024 · This means the primary crystalline region of spherulites is improved, and the morphological distribution of spherulites becomes more uniform. This phenomenon is ascribed to the enhanced movement in the molecular chains under the thermal effect [ 10 ]. spicer 302286