Metastable rotator phase
Web22 jan. 1999 · Materials often crystallize into metastable forms when cooling from the melt. Once formed, a metastable phase may remain stable indefinitely even for very large … WebNormal alkanes display multiple ordered phases, including an orthorhombic crystal (X) and two partially ordered rotator phases (RI and RII). The rotator phase transitions X-RI and RI-RII are of interest because they are weakly first-order, and because experiments suggest that crystalline polyethylene may nucleate via a metastable rotator phase.
Metastable rotator phase
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Web13 jun. 2011 · Normal alkanes display multiple ordered phases, including an orthorhombic crystal (X) and two partially ordered rotator phases (RI and RII). The rotator phase transitions X–RI and RI–RII are of interest because they are weakly first-order, and because experiments suggest that crystalline polyethylene may nucleate via a metastable rotator … Web1 jun. 2011 · Search life-sciences literature (39,361,474 articles, preprints and more) Search. Quick link: Coronavirus articles and preprints
Web24 apr. 1998 · We demonstrate the relation between supercooling of n-alkane melts and the appearance or nonappearance of rotator phases. Supercooling occurs for the shorter, … Web12 okt. 2024 · By using direct numerical simulations of up to a resolution of 512 × 512 × 32 768 grid points we discover the existence of a metastable out-of-equilibrium state in …
WebMetastability. A metastable state of weaker bond (1), a transitional 'saddle' configuration (2) and a stable state of stronger bond (3). In chemistry and physics, metastability denotes an intermediate energetic state within a dynamical system other than the system's state of least energy . A ball resting in a hollow on a slope is a simple ... Web1 jan. 2014 · The rotator phases of alkanes are often observed in confined geometry such as microcapsules, which are weakly-ordered crystalline phases that lack long-range order with respect to rotation about the long axis of the molecule [17], [32], [33], [34], [35].
Web1 aug. 2024 · In a crystalline rotator phase, molecules have long – range positional order in a lamellar structure and they rotate or oscillate around their long axes [31]. The rotator phases can be stable, metastable and transient where stable rotator phases form in alkanes with odd numbers of C-atoms and even-numbered alkanes (n ≥ 22) [32].
WebDownloadable (with restrictions)! A new method for supercooling suppression of microencapsulated phase change materials (PCMs) has been developed by optimizing the composition and structure of the microcapsule resin shell. The microcapsules comprising paraffin octadecane encapsulated in melamine–formaldehyde resin shell were … ceo of whatsapp 2021Web22 jan. 1999 · A transient metastable rotator phase occurring on crystallization of hexadecane into its triclinic phase from the supercooled melt was directly observed with … ceo of william hillWeb14 feb. 2024 · The nucleation proceeds through a transient metastable rotator phase and the stable phase observed for C 16, C 18, and C 20 is triclinic crystalline phase . The heterogeneous nucleation of encapsulated n-octadecance results in … buy paphiopedilum orchidWeb1 apr. 2024 · Metastable supercooled liquids are extremely vulnerable to impurities and external disturbances. They are favourably disposed towards stable condition through forming a new phase. Thus, capability of a reliable nucleation when releasing the latent heat is very important [19]. ceo of wickes email addressWeb6 jan. 2024 · The aim of this work is to briefly characterize the phase equilibria in the ternary system CsBr-AgBr-InBr3 and ... (Rigaku, Tokyo, Japan) with a proportional point detector on CuKα radiation (λ = 1.5418 Å) rotating copper anode in the range 2θ of ... This means that the binary system AgBr-Cs 2 InBr 5 is metastable while CsAgBr ... ceo of wipro limitedWeb22 jul. 2015 · In the emulsions exhibiting drop self-shaping, the scattering spectra reveal the formation of intermediate, metastable rotator phases in the alkane drops before their … ceo of wilson sporting goodsWebThis experimental fact reflects the metastable nature of the rotator phase in C20 and explains why the rotator phase cannot be observed in a heating run starting from the triclinic phase, which is the thermodynamic reference phase at lower temperatures. ceo of wipro 2021