Theory of crystallization in copolymers
Webb11 jan. 2024 · The macromolecular architecture is the crucial factor in determining the arrangement of the ordering structures, which, because of the multiscale feature, may exhibit distinct melting behaviors and induce the so-called memory effect to affect the following recrystallization. WebbThe melt-memory is a common phenomenon in polymer crystallization where recrystallization of a semicrystalline polymer depends profoundly on the nature of its initial melt state.1–21 If a semi-crystalline polymer is melted and then recrystallized, the time required for recrystallization, the shape of the recrystallization isotherm, and the
Theory of crystallization in copolymers
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Webbför 2 dagar sedan · The 2006 edition of this authoritative guide on liquid crystalline polymer (LCP) science was produced in response to the wealth of new material generated in the field. It takes the reader through the theoretical underpinnings to real-world applications of LCP technology in a logical, well-integrated ... WebbThe thermodynamic data for macromonomers and polymers were calculated according to the theory of Flory and Vrij, which has been shown to describe well the melting behavior of linear PEO. It is shown that the melting parameters for macromonomers are identical to those of pure PEO in spite of the presence of the chain ends of different nature.
Webb8 juni 2016 · In order to understand orientation-induced crystallization of polymers, we introduced an intermolecular interaction between polymer chains based on quantum mechanics. We therefore considered a pair of perfectly extended chains where the intermolecular interaction is assumed to be based on the hydrogen interaction with a … Webb8 okt. 2024 · Polymer crystallization occurs in many plastic manufacturing processes, from injection molding to film blowing. Linear low-density polyethylene (LLDPE) is one of the most commonly processed polymers, wherein the type and extent of short-chain branching (SCB) may be varied to influence crystallization.
WebbTheory reveals (1) that orbital ... -Giraldo and Prof. Taylor, explores how chemically diverse substituents influence the effectiveness of novel … Webbcrystallization where recrystallization of a semicrystalline polymer depends profoundly on the nature of its initial melt state.1–21 If a semi-crystalline polymer is melted and then …
WebbPolymer crystallization under chain and space confinements is studied by Monte Carlo simulation. The simulation results show that the crystallinity and melting temperature of …
Webbproperties of polymers in the solution phase. Teraoka's purpose in writing Polymer Solutions is twofold: to familiarize the advanced undergraduate and beginning graduate student with basic concepts, theories, models, and experimental techniques for polymer solutions; and to provide a reference for researchers working in the area of bing free wallpaper holidayWebb25 juni 2024 · Propylene-based random copolymers with either ethylene or 1-hexene as comonomer, produced using a metallocene catalyst, were studied regarding their crystallization behaviors, with a focus on rapid cooling. To get an impression of processing effects, fast scanning chip calorimetry (FSC) was used in addition to the characterization … bing free wallpaper every dayWebbWhile the copolymers rich in butylene (~50%) behave like locally amorphous systems in terms of all applied techniques (DSC, DS, WAXS), the samples with low (~20%) butylene content display more complex thermodynamic and structural properties, including a lower liquid-to-glass temperature and weak crystallization up to 300 K. cyw9emlff3WebbThe process where an ordered (crystalline) phase is produced from a disordered amorphous phase is referred to as polymer crystallization. The process of melt … cyw9p62s1-43012evb-01WebbA theory of necking in semi-crystalline polymers A. I. Leonov Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325-0301, USA. Abstract Necking or cold drawing is a smoothed jump in cross-sectional area of long and thin bars (filaments or films) propagating with a constant speed. cyw9p62s1-43438evb-01WebbThis article is published in Polymer.The article was published on 1981-09-01. It has received 21 citation(s) till now. Chrome Extension. Upload PDF Discover. Log in Sign up. Home. Tools. Citation generator. Chrome Extension. Home / Papers / Analysis of the crystallization kinetics of isotactic polypropylene by infra-red spectroscopy; Overview ... bing free wallpapers for desktopWebb1 jan. 2006 · This article reviews the various theories of polymer crystallization which have been proposed over the last thirty years. Their background in thermodynamics and … bing free website submission