1 edition of Rheological Behaviour of Polypropylene Through Extrusion and Capillary Rheometry found in the catalog.
by INTECH Open Access Publisher
Written in English
|Contributions||Azlan Ariffin, author, Nor Azura Abdul Rahim, author, Suzi Salwah Jikan, author|
|The Physical Object|
|Pagination||1 online resource|
A novel rheological measuring apparatus was designed, which introduced an additional sinusoidal vibration in parallel on the extruding direction of polymer melt in this paper. Melt rheology of polypropylene filled CaCO3 particles in various amounts of filler (i.e. with 3 and 20 wt%) during capillary melt-extrusion were investigated by: 1. Capillary Rheometry* R. E. JERMAN** and D. G. BAIRD, Department ofChemical Engineering, andEngineering Science and Mechanics, Virginia Polytechnic Institute arid State University, Blacksburg, Virginia Synopsis Rheological properties of two copolyesters which exhibit liquid crystalline behavior.
Protocol of capillary test for a characterization of rheological properties in various rubber compounds was implemented. By the use of capillary die specially designed by Michelin, the surface characteristics of the extrudate of various rubber compounds were investigated. Parameters investigated were: types of rubber matrix (NR, BR and SBR), loadings of carbon Cited by: 1. Packaging is boring, unless it delivers share-worthy signature moments. You are assigned to design suitable luxury package with company’s signature for your food product. Your package design has to be attractive and sellable.
The rheological properties of polypropylene melts were investigated in oscillatory shear flow, capillary rheometry, and uniaxial elongation at constant tensile stress as well as constant strain rate. At small stresses the steady‐state elongational viscosity of linear conventional polypropylene has the threefold value of the shear viscosity. With increasing stress both the shear and Cited by: mental atmosphere was used in all rheological tests. In order to determine the strain value to be applied to the rheological tests (linear viscoelasticity region), the G’and G” moduli curves were obtained as a function of a broad strain range ( to %), through a strain % sweep test, maintaining the frequency constant at 1 Size: 2MB.
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Rheological Behaviour of Polypropylene Through Extrusion and Capillary Rheometry Chapter (PDF Available) January with Reads How we measure 'reads'. A free online edition of this book is available at Chapter 3 Rheological Behaviour of Polypropylene Through Extrusion and Capillary Rheometry 29.
Rheological Behaviour of Polypropylene Through Extrusion and Capillary Rheometry. By Zulkifli Mohamad Ariff, Azlan Ariffin, Suzi Salwah Jikan and Nor Azura Abdul Rahim. Submitted: May 23rd Reviewed: November 14th Published: May 30th DOI: /Cited by: Rheology is the science of studying the flow and deformation of materials rooted in the laws of elasticity and viscosity proposed by Hooke and Newton in the late 17 th Century.
Thermoplastic polymer melts are widely used in many modern industrial processes to manufacture a multitude of : Malvern Panalytical. Rheological Behaviour of Polypropylene Through Extrusion and Capillary Rheometry. By Zulkifli Mohamad Ariff, Azlan Ariffin, Suzi Salwah Jikan and Nor Azura Abdul Rahim.
Open access peer-reviewed. Mechanical Behavior Variation of an Isotactic Polypropylene Copolymer Subjected to Artificial Aging. By Hugo Malon, Jesus Martin and Luis.
This book explores the ways in which melt flow behaviour can be exploited by the plastics engineer and technician for increased efficiency of processing operation, control of end product properties and selection and development of polymers for specific purposes.
(reissued with minor corrections ). Rheological and crystallisation behaviour of high melt strength polypropylene under gas-loading. capillary rheometry is a good method.
Gerhard et al. firstly used a sealed capillary rheometer to measure CO 2 loaded PDMS. In-line rheometry for foam extrusion lines is a commonly used method to obtain data under gas-loading.
Correlation of Cited by: Characterising the rheological and thermal properties of filled thermoplastics Martin Rides1, Crispin Allen1, D. Fleming2 1 National Physical Laboratory, Teddington, TW11 0LW, UK 2 Fleming Polymer Testing & Consultancy, Kidderminster, DY10 4JB, UK 1 @ Abstract Fillers can have very significant effects on the rheological and thermal properties of.
Also most rheological tests are done in shear using rotational or capillary rheometers, process flows are usually mixed flows with elongation deformations being important and dominant in processes like film blowing, blow molding, fiber spinning, etc.
The elongation viscosity of. Rheological Properties and Phase Structures. Introduction. Rheology is a branch of physics that deals with the de-formation and flow of matter under stress.
It is particu-larly concerned with the properties of matter that deter-mine its behaviour when a mechanical force is exerted on it. Rheology is distinguished from fluid dynamics be. The material is polypropylene measured at ºC.
Behavior of Thermoplastics at the Wall of the Capillary Die. A fundamental assumption when calculating rheological properties with a capillary rheometer is that the material at the wall of the capillary die is stationary – this is the so-called stick : Malvern Panalytical.
(HDPE) and polypropylene (PP) and its interaction with 80 pen base bitumen. As it is known that the modification of bitumen by the use of polymers enhances its performance characteristics but at the same time significantly alters its rheological properties. The rheological study of polymer modified bitumen (PMB) was made through.
The two series of materials were also submitted to extrusion tests using a single screw extruder equipped with a capillary die.
Based on the extrusion results, with respect to the CRPPs of similar MW, materials of broader MWD, thus stronger shear-thinning at high shear rate, resulted in slower increase of extrusion pressure with apparent shear Cited by: 1. The capillary extrusion flow experiment has also been used to measure the boundary slip velocity between the capillary wall and the flowing material 2, The rheological properties of complex fluids are greatly influenced by the interface between the wall of rigid equipment and the material.
Material Behaviour Rheological properties of polypropylene during multiple extrusion Helson M. da Costa*, Vale´ria D. Ramos, Marisa C.G. Rocha Instituto Polite´cnico-IPRJ, Universidade do Estado do Rio de Janeiro—UERJ, P.O.
BoxNova Friburgo, RJ, Brazil Received 26 May ; accepted 29 June Abstract. Given the growing interest in thermal processing methods, this study describes the use of an advanced rheological technique, capillary rheometry, to accurately determine the thermorheological properties of two pharmaceutical polymers, Eudragit E (E) and hydroxypropylcellulose JF (HPC) and their blends, both in the presence and absence of Cited by: 9.
These test methods describe how capillary rheometry may be used to measure the rheological characteristics of rubber (raw or compounded).
Two methods are addressed: Method A-using a piston type capillary rheometer, and Method B-using a screw extrusion type capillary rheometer. Overview of Capillary Rheometry There are basically two types of capillary rheometers: speed-controlled and pressure-controlled.
The discussion in this contribution is limited to speed-controlled capillary rheometers in which the flow rate is imposed and the pres-sure is monitored.
A schematic of the capillary rheometer is shown in Fig. The present study reports the results of rheological behavior of renewable composites, based on a matrix of high density polyethylene (HDPE), made from ethanol distilled from sugarcane, and lignocellulose filler from waste generated in the processing of sponge gourds for bathing use.
The composites were prepared w 20, 30, and 40%wt of filler in a twin-screw by: 4. provides the necessary decision-making tools for the appropriate choice of rheological testing methods, and the means to troubleshoot rheology related problems encoun-tered in polymer processing.
The organization of Polymer Rheology – Fundamentals and Applications and the practical examples throughout the book make it an ideal. Rheological Properties of Tailor-Made Metallocene and well developed for commodity Ziegler-Natta based polypropylene (ZN-PP) resins, resulting in shear rheometry, were successfully applied to monitor the MW level and the MWD of the products.
The two series of materials were also submitted to extrusion tests using a single screw extruder.This study is based on characterization of Polypropylene melt by capillary rheometry. It includes operating the twin bore capillary rheometer, preparation of samples, measurement of rheological properties of polymer melts.
In this study, samples of PP pellets of 3 different molecular weights were investigated. The samples were subjected to well.INTRODUCTION Linear low-density polyethylenes (LLDPE) are used in industry to manufacture films, pipes, sheets, and profiles. The physical performance of products made with LLDPE resins depends on their molecular weight, molecular weight distribution, comonomer type and content and its distribution in the resin.