Flow induced crystallization

Author: jkpe

August undefined, 2024

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 … 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, …

(PDF) Flow-Induced Crystallization of Polyamide-6

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. 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. shanghai gokai industry co. ltd

Evaluation of Self-Assembly Pathways to Control Crystallization …

WebNov 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 … WebThe superscript "T" denotes thermally induced crystallization, whereas the superscript "f" denotes flow-induced crystallization. All variables are per unit volume and are … 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 ... shanghai glory home furnishings co. ltd

Polymer crystallization under external flow - IOPscience

Modeling of Flow-Induced Crystallization of Particle-Filled …

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 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 … shanghai global financial centerWebNov 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…. shanghai global investment

"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: ... " - Flow induced crystallization

Flow induced crystallization

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. 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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WebSep 9, 2016 · Flow-induced crystallization (FIC) is a non-equilibrium thermodynamic phase transition occurring in daily industrial processing of semicrystalline polymers with an annual consumption of hundred ... WebThe remaining of the paper is divided in two parts. In the first part of the review, the basics of polymer crystallisation are summarized; the main factors acting on the process are …

WebThe Role of Macromolecular Architecture in Flow-Induced Crystallization. RESEARCHER: Bo Shen. Semicrystalline polymers are processed predominantly from the melt, for … WebNov 7, 2013 · The general phenomenon of shear-induced crystallization (SIC), or flow-induced crystallization (FIC) has been studied extensively, both theoretically and …

WebFeb 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 … WebJan 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.

WebThe 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 ...

WebOct 10, 2024 · In flow induced crystallization (FIC) of polymer, the effective extension of molecular chains can dramatically change the structural dynamics and final morphology. Hierarchical structure formation can be controlled by flow parameters, leading to different macroscopic material properties. With complex chain structures such as polydispersity ... shanghai gloucester menuWebDec 21, 2024 · In this research, the influence of some nucleating agents and MFR on the crystallization behavior of isotactic polypropylene (iPP) Homopolymer has been investigated by OM (Optical Microscopy) and (TEM) after undergoing FIC (Flow Induced Crystallization) crystallization by a parallel plate rheometer (PPR). For several years, … shanghai godfatherWebNov 7, 2013 · The general phenomenon of shear-induced crystallization (SIC), or flow-induced crystallization (FIC) has been studied extensively, both theoretically and experimentally, for a wide range of ... shanghai gm recalling carsWeb19 rows · Jun 22, 2024 · The flow-induced crystallization (FIC) is commonly encountered in the polymer industry as more ... shanghai golden bridge industrial co. ltdWebJul 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 … shanghai gold apple schoolWebMar 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 ... shanghai golden bund real estate co. ltdWebSep 2, 2015 · Flow-induced crystallization (FIC) of polymer melts is a fundamental issue of polymer physics. It is of clear theoretical significance, and very important in practical … shanghai golden bridge infotech