2 edition of in-situ production of polyethylene fibres from polymer blends. found in the catalog.
in-situ production of polyethylene fibres from polymer blends.
Stuart Charles Steadman
Published
1990
by Brunel University in Uxbridge
.
Written in
Edition Notes
| Contributions | Brunel University. Department of Materials Technology. |
| The Physical Object | |
|---|---|
| Pagination | 317p. : |
| Number of Pages | 317 |
| ID Numbers | |
| Open Library | OL19719932M |
The process of combining natural cellulosic fibers with conducting polymers (CPs) is being pursued by scientist and researchers for their achievable synergistic electrical and biofriendly properties. CPs can be deposited on to a wide variety of cellulosic substrate and fibers, thus achieving good interactions between them. Various methods of deposition include in situ polymerization, physical. Although preformed polymers are commercially available for use in the design and development of drug delivery systems, in situ polymerization has also been situ polymerization affords the platform to tailor and optimize the drug delivery properties of polymers. This review brings to light the benefits of in situ polymerization for oral drug delivery and the possibilities it.
Fibre-reinforced plastic (FRP) (also called fiber-reinforced polymer, or fiber-reinforced plastic) is a composite material made of a polymer matrix reinforced with fibres. Advantages of carbon fiber. ABOUT CS Carbon Fiber FactoryCS Carbon Fiber Composites Limited was established in and always committed to supplying all kinds of carbon. The fiber concentration profiles of these two blend compositions show that the data points obtained from ligament lengths with l/W [less than] should not be included in the EWF analysis because the reduced [f] obtained near the surface of the sample is not representative of the fracture process defined by the J-contour integral around.
Plastic residue can be processed into composites using wood flour, mineral fillers, plant or synthetic fibers to obtain plastic lumber, a substitute material for natural wood. The composition and processing conditions are largely responsible for the final characteristics of the plastic lumber. Factors such as density, particle size and moisture content in the material to be processed require. All other things being equal as we increase polymer chain length so we increase fiber strength. Fringed Fibril Structure. Comparison Of Conventional And Ultra High Molecular Weight Polyethylene Spectra® Ultra High Molecular Weight Polyethylene. Typical polymer repeat length in the tens of thousands. 3% elongation at break. Tenacity 38 g/denier.
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Book contents; FRC –Composites for the Millennium Met., / 9 F. Ehtaiatkar, M.J. Folkes, and S.C. Steadman, 'In situ production of polyethylene fibres from polymer blends', J.
Mater. Sci., 24 10 A Andreatta, and P. Smith, 'Processing of conductive polyaniline-UHMW polyethylene blends from solutions in Cited by: The microstructure and mechanical properties of extruded specimens of a block copolymer-homopolymer polyethylene blend have been extensively studied.
Through careful control of the blending and extrusion process, the dispersed polyethylene phase can develop,in situ, to yield stiff fibres having a tensile modulus of about 15 GPa.
This fabrication strategy for composite materials is Cited by: The in-situ production of polyethylene fibres from polymer blends. Author: Steadman, Stuart Charles. ISNI: Awarding Body: Brunel University Current Institution: Brunel University Date of Award: Availability of Full Text.
Bing Na, Ke Wang, Qin Zhang, Rongni Du, Qiang Fu, Tensile properties in the oriented blends of high-density polyethylene and isotactic polypropylene obtained by dynamic packing injection molding, Polymer, /r, 46, 9, (), ().Cited by: From the preparation point of view, the microfibrillar blend is superior to the common composites reinforced by discontinuous fibers, such as glass fiber and carbon fiber, which have the inevitable drawbacks of complex production techniques, high materials and labor costs, environmental impact and inhomogeneous by: Blend films with PLA contents of 5–20 wt% were produced and compared.
Scanning electron micrographs of cross‐sectional cryofractured surfaces of the blend films revealed that in situ fibre‐reinforced composites were obtained. Viscosity ratio of the polymer components of ca 1 confirmed that fibre formation was favourable for this blend.
The phase transformations under elevated pressure have been followed in situ by X-ray and Raman spectroscopy for ultrahigh-molecular-weight polyethylene (UHMW−PE) reactor powder. Using the in situ X-ray as a reference for the Raman work, it has been shown that Raman spectroscopy is a convenient method to follow phase transformations in polyethylene under pressure.
Steadman, S.C. () The in situ production of polyethylene fibres from polymer blends, PhD Thesis, Brunel Steadman S.C. () Fibre forming blends and in situ fibre composites.
In: Folkes M.J., Hope P.S. (eds) Polymer Blends and Alloys. Online ISBN ; eBook Packages Springer Book Archive; Buy this book on publisher's. Poly(ethylene terephthalate) (PET) microfiber was in-situ formed by compounding PET with polyethylene (PE) through a single screw extruder of a Haake rheometer system, where a rod die with comparatively smaller diameter ( mm) was used, and the extrudate was drawn in a certain drawing ratio () and quickly cooled in cold water.
PLA/ENR (a blend polymer consisting of PLA and ENR in the ratios /0, 90/10, 75/25 and 50/50 wt. %) solutions were prepared by dissolving in chloroform to obtain a 15% w/v polymer concentration.
The solution was then poured in a 5 mL BD Luer-Lok tip plastic syringe having a stainless-steel needle with 25 gauge 90˚ blunt end. The catalytic ethylene polymerization on dual-site catalysts, supported on functionalized graphene, enables nanostructure formation in polyethylene reactor blends by in situ formation of uniformly dispersed ultrahigh molecular weight polyethylene (UHMWPE) nanoplatelets and in situ formed aligned UHMWPE shish-kebab nanofibers.
For tailoring bimodal molar mass distributions, the. The performances of these polymer blends depend not only on the characteristics of each component but also on the phase morphology. Hence, the dispersed phase of the polymer blends is usually processed into a hierarchical structure, such as as fiber, ribbon or lamella, in order to meet specific product demands [4,5,6,7].
Optimization of the polymer blend performance can be done through the control of blend morphology via molecular structures of the components, blend compositions, and processing conditions (Paul.
The addition of E-GMA to the rHDPE/rPET blends was found to recover the blend toughness as well as improving the compatibility between HDPE and PET.
In this study, the highest strain at break was obtained for the rHDPE/rPET blends at 75/25 (wt/wt) composition with E-GMA content of 5 php. The in situ reactive interfacial compatibilization and properties of polylactide/sisal fiber biocomposites made via melt blending with an epoxy-functionalized terpolymer elastomer, ethylene/methyl acrylate/glycidyl methacrylate (EGMA), were investigated.
Scanning electron microscopy results showed that the introduction of EGMA improved the interfacial adhesion between the sisal fibers (SF) and.
in situ small angle X-ray scattering. Even though polyolefin fibres, such as polyethylene and polypropylene, are used for several applications in the textile indus the reported values. In situ tensile testing in the SEM was carried out in order to find the reason for brittle-to-ductile transition of the PLA matrix in PLA/PBAT, PLA/PBASGT blends and composites and to clarify how the morphology of the minor polymer phase affects the mechanism of plastic deformation.
A blend of low density polyethylene and crystalline polypropylene can be melt spun at high temperature and high speed to produce a fiber. The fiber has utility as a binder fiber in nonwoven fabrics. The blend contains 5 to 35% by weight polypropylene and 95 to 65% of polyethylene.
Aims: Nylon or polyamide is one of the most used and most important polymers used in the plastic and fiber industries of the this reason, its use is less sensitive to the properties of its very poor biodegradability.
Therefore, the aim of the present study was the biodegradability modification of synthetic polyamide 6 (pa6) fibers via in-situ melt blending with recycled poly (lactic.
The article presents a new fabrication method for bioactive fibres with a microporous structure of ethylene–vinyl alcohol copolymers (EVOH)/ethylene−propylene copolymer (EPC) blends. The experimental work carried out resulted in obtaining EVOH/EPC polymer blends fibres with the addition of glycerol and sodium stearate.
Different concentrations of glycerol (38%, 32%) and sodium. Necking phenomena in toughness-improved PMMA fibres. Fig. 2a shows the tensile testing curve recorded during in-situ SEM analysis of the fibre mat consisting of PMMA fibres with 25 wt% PEO.
The testing stage was stopped at different strain levels; 4, 8, 20, 40 and % – to investigate the failure behaviour of the fibre mat (Figs. 2 c–f).A progressive thinning and sequential failure of.This book skillfully blends and integrates polymer science, plastic technology and rubber technology.
The fundamentals of polymerization, polymer characteristics, rheology and morphology, as well as the composition, technology, testing and evaluation of various plastics, rubbers, fibres, adhesives, coatings and composites are comprehensively.Polyolefin fibres Fibres made from polymers or copolymers of olefin hydrocarbons such as ethylene, propylene are called polyolefins.
Polyethylene: Of all the fibre forming polymers, polyethylene (made by addition polymerisation) Ch2==Ch2 has the simplest structure. Manufacture: Ethylene is the principal raw material for producing polyethylene fibres.
Ethylene gas is obtained by cracking petrol.
