Spherulitic morphology
WebIt is proposed that spherulitic growth depends on the initial morphology of the crystallite, wherein the gelatin concentration, temperature, and initial supersaturation play a vital role. … WebJun 23, 2024 · The morphology of the spherulitic structure was analyzed via FESEM imaging of the spall plane surface using a JSM-7500F FESEM (JEOL). The samples used for the …
Spherulitic morphology
Did you know?
WebMay 6, 2003 · Comparison of mechanical properties between transcrystalline and spherulitic polypropylenes demonstrated that Young’s modulus is dependent on the crystallinity and independent of the... WebApr 19, 2024 · As has been presented, the spherulitic morphology relies on a combination of the stacking and orientation manners of radial lamellae. The authors had tried to manipulate the orientation behavior of radial lamellae in PCL 11.3k spherulites by changing the evaporative crystallization process. Excepting the successful manipulation between …
WebOct 11, 2024 · The morphological results showed reduced spherulitic crystal nucleus size and increased distribution in blends with increasing LMPP. The blends showed subtle linear viscoelastic responses with strong nonlinear mechanical responses to variant strain and stress compared to pure iPP. ... The crystalline morphology of iPP/LMPP blends can be … WebJun 1, 2016 · Comparing the morphology over the entire foil cross-section, the spherulitic structures located in the middle tend to appear more coarsely distinct. This could …
Webcontaining oligomers promotes the formation of spherulitic supramolecular structures. As a result of this action, boundary layers are formed with minimal mobility of macromolecules. With an increase in the thickness of the coating and the dose of energy, the orientational effect of the solid substrate decreases, and the supramolecular WebOct 1, 1998 · Spherulitic morphology and the melting behavior of the blends were strongly dependent upon the crystallization kinetics and some unique phenomena were found out: (i) in contrast to the other ...
WebIt is proposed that spherulitic growth depends on the initial morphology of the crystallite, wherein the gelatin concentration, temperature, and initial supersaturation play a vital role. Gelatin can significantly inhibit NQ nucleation, promote branching, and modify the morphology of NQ subunits.
WebBased upon quantitative analysis of the crystal-nucleation behavior at low temperatures near the glass transition, using Tammann’s two-stage nuclei development method, a nucleation pathway for an acceleration of the crystallization process and for tailoring the semicrystalline morphology is provided. chang chun expressWebJan 1, 2007 · The structure is modified by the addition of specific nucleating agent, special processing conditions or blending with polyethylene. The addition of β-nucleating agent … changchun faway automobile components co. ltdWebMay 20, 2024 · This value replaces in the Hoffman–Lauritzen expression (equation (6)) T m,0 allowing to determine the effect of flow on the spherulitic growth rate. In its turn, the excess of growth rate allows to evaluate the nucleation density increase according to Fig. 7 b; thus, the evolution of the spherulitic morphology under flow is completely described. changchun faw-vw automotive culture co ltdIn 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… hard drive not appearing in disk managementWebJan 23, 2024 · The spherulitic morphology is considered to be the most common morphology of crystalline materials and is particularly apparent in melt-crystallized … hard drive not appearing windowsWebJul 19, 2005 · Isothermal transition between a square-shaped single crystal and a category 1 spherulite induced by growth front nucleation, as predicted by the phase field theory. Note the gradual morphological transition and the lack of a sharp demarcation line between areas solidified with square and spherulitic morphology in the fully grown spherulite. changchun fengyue companyWebJan 24, 2002 · In PBT-rich blends, the PAr(I-100) does not crystallize, and it was found that the spherulitic morphology exhibits a traditional Maltese cross pattern and then became coarser and more open with increasing amount of PAr(I-100). The non-crystallizable PAR(I-100) was trapped inside the spherulites. For medium composition blends, PBT and PAr(I … hard drive not being detected windows 11