Flow induced crystallization

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August undefined, 2024

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 … Web19 rows · Jun 22, 2024 · The flow-induced crystallization (FIC) is commonly encountered in the polymer industry as more ...

Strain-Induced Crystallization - ScienceDirect

WebFlow-induced nucleation and crystallization are observed in conjugated small molecules and polymers, and are closely related to the flow-induced polymer conformational changes and enhanced mass and heat transfer observed during crystallization. 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 ... can i maximize both ira and 401k

The non-equilibrium phase diagrams of flow-induced crystallization …

WebFeb 15, 2024 · The PPS melt is under a complex flow field and thermal condition during the injection molding process that results in flow-induced crystallization (FIC). According … 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…. WebApr 9, 2024 · Nafar Sefiddashti, M.H.; Edwards, B.J.; Khomami, B. Atomistic Simulation of Flow-Induced Microphase Separation and Crystallization of an Entangled Polyethylene Melt Undergoing Uniaxial Elongational Flow and the Role of Kuhn Segment Extension. Polymers 2024, 15, 1831. https: ... fiu cook islands

Strain-Induced Crystallization - ScienceDirect

Recent progress in flow-induced polymer crystallization

WebThe nonlinear dynamics in film blowing process is simulated employing the governing equations of the system that include the flow-induced crystallization (FIC), i.e., the continuity, the two force balances (axial and circumferential), the energy, the crystallinity, and the constitutive equations of Phan-Thien Tanner (PTT) model. 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 … can i max out both sep and simple ira\u0027sWebThe so-called flow-induced crystallization is therefore a phenomenon that for PLA can be considered strategic toward the realization of parts with enhanced properties. In this work, a state of the art on flow-induced crystallization of PLA is presented. AB - Poly(lactic acid) is surely one of the most interesting commercially available ... can i max out both roth and traditional ira

"WebJul 1, 2013 · Molecular properties are reflected in the rheological and crystallization behavior. The first task is to design and use some well‐defined experiments that … " - Flow induced crystallization

Flow induced crystallization

Recent progress in flow-induced polymer crystallization

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 … 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 ...

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WebMar 30, 2024 · Understanding polymer crystallization with the presence of flow, or namely flow-induced crystallization (FIC), is crucial to optimize polymer processing parameters and to understand phase transition under far-from equilibrium conditions, as FIC is essentially a typical nonequilibrium process. Current review aims to summarizes recent ... 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 …

WebApr 9, 2024 · At high flow strength, a flow-induced crystallization (FIC) occurred, producing a semicrystalline material possessing a high degree of crystallinity and … WebNov 7, 2009 · The transitions between the different flow regimes and the associated physical processes governing the flow-induced crystallization (FIC) processes are defined by the critical values of the Deborah numbers (De) related to the molecular orientation (De rep) and molecular stretch (De s). An extensive evaluation of experiments reported in the ...

WebJan 10, 2024 · Flow-induced crystallization of a polyethylene liquid above the melting temperature and its nonequilibrium phase diagram. January 2024; Physical Review Research 2(1) WebMar 10, 2015 · A model is presented to describe flow-induced crystallization in isotactic polypropylene at high shear rates. This model incorporates nonlinear viscoelasticity, compressibility, and nonisothermal process conditions due to shear heating and heat release due to crystallization.

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 ...

WebJan 1, 2024 · When polymer crystallization is induced by flow elongation, the semicrystalline morphology is affected by the orientation. The most obvious effects induced during flow are ascribed to kinetic and morphologic aspects, where in comparison with quiescent conditions the developed crystals trend to evolve from spherical to elongated … can i max out my 403b and 457bWebAug 3, 2024 · We propose a unified thermodynamic model of flow-induced crystallization of polymer (uFIC), which incorporates not only the conformational entropy reduction but … fiu cost per yearWebFlow-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. fiu cooking classesWebFlow-induced crystallization (FIC) is a typical nonequilibrium phase transition and a core industry subject for the largest group of … fiu cooking schoolWebJul 6, 2024 · Flow-induced crystallisation of polymers from aqueous solution Introduction. In the natural world numerous strategies for efficient processing of materials have evolved 1, 2, and one... Results. PEO is crystallisable and water soluble, due to the similarity of its … We would like to show you a description here but the site won’t allow us. fiu contract agreement formsWebJan 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, … fiu copy of diplomaWebFeb 18, 2024 · The effects induced by the flow on polymer crystallization behavior can be summarized into three aspects, namely accelerated nucleation rate, modified crystal morphology, and newly formed crystal structure, which are all directly relevant to the end-use properties [11, 19].To attain the ultimate goal of predicting the polymer … fiu cost per credit hour 2021