Capillary extrusion
WebFeb 26, 2002 · We measure the flow kinetics of a polyethylene extruded through the exit of a sapphire capillary tube in order to understand the nature of sharkskin, a surface roughness in the extruded material. WebApr 1, 1997 · The extrudate surface was also observed for a range of test temperatures from 90 to 135 and for apparent shear rates of about 10-103 s -' . 3. Results and discussion 3.1. Experimental observations The unsteady flow of polymer melts due to their high elasticity during capillary extrusion can be divided roughly into three types.
Capillary extrusion
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WebOct 20, 2007 · Capillary Extrusion rheometer Advanced capillary extrusion rheometers comprise a temperature controlled barrel incorporating one or more precision bores fitted with capillary dies at the exit. Melt pressure transducers are mounted immediately above the dies to record the pressure drop as polymer melt is extruded through the dies at … WebMar 10, 2006 · In extrusion processes, the rates of industrial production are often limited by the onset of flow instabilities that perturb the shape of the extrudate. These instabilities can affect the surface or the whole volume of the extruded material, and they have been the subject of a large number of studies for more than 50 years.
WebJul 24, 2024 · Musil and M. Zatloukal, “ Flow induced molecular weight fractionation during capillary flow of linear polymer melt,” in Recent Advances in Fluid Mechanics, Heat and Mass Transfer and Biology–Proceedings of the 9th WSEAS International Conference on Fluids (WSEAS, Boston, MA, 2012), pp. 162– 167. WebSep 19, 2012 · The capillary extrusion behaviors of high-density polyethylene (PE) containing carbon fibers (CF) were investigated from a …
Webvitro study of apical extrusion of sodium hypochlorite during endodontic canal preparation. J Endod 1995; 21: 587–591. 3. Özdemir O, Hazar E, Koçak S, Sağlam B C, Koçak M M. ... or capillary ... WebMay 1, 2006 · The rheological characterization included: (i) frequency sweep experiments at various temperatures and application of the time-temperature superposition to obtain the master curves from which the activation energy of flow was found to be independent of molecular weight, (ii) extensional measurements using the Sentmanat Extensional …
WebA Mathematical Model for Viscosity in Capillary Extrusion of Two-Component Polyblends Polymer Journal Published: 01 March 1979 A Mathematical Model for Viscosity in Capillary Extrusion of...
WebMay 1, 2004 · A capillary rheometer measures multiple points on the curve to give a more realistic picture of flow at the higher-shear conditions of injection molding (10,000 to … forms of business organizations pdfWebApr 13, 2005 · Advanced capillary extrusion rheometers comprise a temperature controlled barrel incorporating one or more precision bores fitted with capillary dies at the exit. Melt pressure transducers are mounted immediately above the dies to record the pressure drop as polymer melt is extruded through the dies at programmed flow rates. By the use of a ... different ways people loveWebA capillary is a small blood vessel from 5 to 10 micrometres in diameter, and is part of the microcirculation system. Capillaries are microvessels and the smallest blood vessels in the body. They are composed of only the … different ways people prayWebAug 17, 2024 · The capillary flow porometry technique, also known as fluid–fluid displacement porometry (FDP), mainly comprises two similar techniques, gas liquid … forms of business organizations pptWebExtrusion distance giving the maximum swell ratio for semi-dilute polymer solutions For a capillary with a L/D ratio of 85, the swelling of polyacrylamide solution was observed to reach a maximum at a given time t at a given distance (expressed as a multiple Z of capillary diameter D ) from the capillary[70], i.e., the swelling is finite. forms of business organizationsWebJun 24, 1998 · The interfacial characteristics of a variety of polymer/wall interfaces were measured by using the sessile drop method in order to calculate the work of adhesion. Polymers included linear low-density as well high-density polyethylenes, while wall substrates included clean stainless steel and modified stainless steel by applying two … different ways people say momWebAug 17, 2024 · The capillary flow porometry technique, also known as fluid–fluid displacement porometry (FDP), mainly comprises two similar techniques, gas liquid displacement porometry (GLDP), and liquid–liquid displacement porometry (LLDP) ( Figure 1 ). Figure 1. Young–Laplace-based techniques. different ways people meditate