Flow induced crystallization

WebJan 19, 2024 · In this work, the flow-induced crystallization of two polylactides (PLAs) with different microstructures (different l-lactic acid contents) is studied using simple shear, uniaxial extension and capillary flow experiments.In a simple shear and capillary flow, an increase in shear rate and a decrease in temperature were found to enhance the … WebApr 9, 2024 · At high flow strength, a flow-induced crystallization (FIC) occurred, producing a semicrystalline material possessing a high degree of crystallinity and primarily a monoclinic lattice structure. This FIC phase formed at a temperature (450 K) high above the quiescent melting point (≈400 K) and remained stable after cessation of flow for ...

Nonequilibrium Nature of Flow-Induced Nucleation in Isotactic ...

WebWe systematically investigate the detailed structure in the flow-induced crystallization of a lightly cross-linked high-density polyethylene as a model semicrystalline polymer sample … WebThe superscript "T" denotes thermally induced crystallization, whereas the superscript "f" denotes flow-induced crystallization. All variables are per unit volume and are … siera ridge homes scottsdale https://ciiembroidery.com

Flow-induced crystallization of polylactides Request PDF

WebSep 3, 2024 · The temperature-induced crystallization-driven self-assembly (TI-CDSA) protocol allowed some control over the shape and size of some of the morphologies. ... The system used two PL1113-6300 ResiPore 3 µm 300 × 7.5 mm columns with DMF as the eluent with a flow rate of 1 mL/min and toluene as flow rate marker. The detector suite … WebMay 22, 2015 · Flow-induced crystallisation (FIC) in polymers 1-3 is a central problem in polymer science. Flow dramatically enhances the nucleation rate, leading to much faster crystallisation kinetics and ... WebFeb 6, 2024 · Abstract. The recently reported crystallization-induced diastereomer transformation (CIDT) of a precursor to navoximod was investigated using online HPLC via a modified EasySampler probe that enables selective solution phase sampling of heterogeneous reaction mixtures. By employing both chiral and achiral stationary … the powel crosley estate sarasota

Flow-induced crystallization of long chain aliphatic ... - ScienceDirect

Category:Modeling Flow-Induced Crystallization SpringerLink

Tags:Flow induced crystallization

Flow induced crystallization

Understanding flow-induced crystallization in polymers: A persp…

WebJul 29, 2024 · Abstract. Flow-induced crystallization has been widely studied for a variety of polymers with the main focus on polyolefins. In this work, research has been conducted on the flow-induced ... WebFlow-Induced Crystallization of Poly(ether ether ketone): Universal Aspects of Specific Work Revealed by Corroborative Rheology and X-ray Scattering Studies. Macromolecules 2024 , 53 (22) , 10040-10050.

Flow induced crystallization

Did you know?

WebJul 9, 2013 · Flow-induced crystallization (FIC) is a typical nonequilibrium phase transition and a core industry subject for the largest group of commercially useful polymeric materials: semicrystalline polymers. WebNov 5, 2014 · Concomitant Crystallization in Propylene/Ethylene Random Copolymer with Strong Flow at Elevated Temperatures. Flow-induced crystallization of α- and γ-phases was studied for a propylene/ethylene random copolymer with 3.4 mol % ethylene at two high temperatures of 132 and 142 °C by combining a pressure-driven….

Web19 rows · Jun 22, 2024 · The flow-induced crystallization (FIC) is commonly encountered in the polymer industry as more ... WebJan 1, 2016 · A modeling framework was presented to describe flow-induced crystallization of iPP at elevated pressures in multiple crystal phases and morphologies. The framework was constructed by …

WebBased on classical nucleation theory, the current entropic reduction model (ERM) of flow-induced crystallization (FIC) treats external work as perturbation on the framework of equilibrium thermodynamics, which, however, obscures the nonequilibrium nature of FIC. In this work, in situ investigation on FIC under strong flow by combining a unique … WebMar 1, 2024 · Flow-induced crystallization in polymers is an important problem in both fundamental polymer science and industrial polymer processing. The key process of flow-induced nucleation occurs on a very ...

WebJan 8, 2024 · Flow-induced crystallization in polymers is an important problem in both fundamental polymer science and industrial polymer processing. The key process of flow-induced nucleation occurs on a …

WebDec 10, 2016 · The well dispersed OXA fibrils and shear flow induced PLLA chain orientation are responsible for the fast crystallization of the PLLA/OXA-240 samples. In … siera wigfield garrett countyWebMar 30, 2024 · Understanding polymer crystallization with the presence of flow, or namely flow-induced crystallization (FIC), is crucial to optimize polymer processing … sierah joughin crime scene photosWebAug 3, 2024 · We propose a unified thermodynamic model of flow-induced crystallization of polymer (uFIC), which incorporates not only the conformational entropy reduction but … siera trading helmets cleranceWebApr 9, 2024 · At high flow strength, a flow-induced crystallization (FIC) occurred, producing a semicrystalline material possessing a high degree of crystallinity and primarily a monoclinic lattice structure ... siera technology limitedWebNov 2, 2024 · The flow-induced formation and relaxation of the representative oriented shish-kebab structure were studied with synchrotron small-angle X-ray scattering (SAXS) method. The flow duration was varied from 2 to 6 s at an identical strain rate to reveal the effect of flow time on stability and dimension … the powell agency plano txWebJan 14, 2024 · The flow history had a great influence on the crystallization of pure PP. Beyond 50 s −1, crystallization occurred at a high temperature, suggesting that flow-induced crystallization took place. the powell agency jobsWebThe Role of Macromolecular Architecture in Flow-Induced Crystallization. RESEARCHER: Bo Shen. Semicrystalline polymers are processed predominantly from the melt, for … sier-bath gear company