Search Results - Polis, L~
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Fabricating poly(lactic acid) and poly(lactic acid)/poly(caprolactone) blend fibres via electrospinning
Published 2019“…The controlled surface and internal porosity can be attributed to mechanisms including breath figure, non-solvent induced phase separation (NIPS) and vapour induced phase separation (VIPS). Chapter 6 investigates fabrication of electrospun porous PLA, PCL and PLA/PCL blend fibres by the NIPS mechanism at given conditions (10kV, CHL/DMSO 80/20 %v/v). …”
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Block copolymers of poly(ethylene oxide) and poly(methyl methacrylate)
Published 1991“…Emulsions produced have been shown to be stable at pH levels where the electrophoretic mobility was zero, ie. the emulsions were sterically stabilised with no contribution from ionic I dipole interactions.…”
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From the cosmos to the polis: On denizens, art and postmigration worldmaking
Published 2017“…Rather, the postmigration worldmaking explored here posits a radically open cosmos that emerges in mutual exchange with a response-able and responsible polis.…”
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Spectroelectrochemistry of electrochromic poly(o–toluidine) and poly(m-toluidine) films
Published 1995“…Visible-range absorption spectra of poly(o-toluidine) and poly(m-toluidine) films on tin-doped indium(III) oxide-coated optically transparent electrodes as a function of applied potential are reported. …”
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Characterisation of long-chain branching in poly (vinyl acetate) and poly (vinyl alcohol)
Published 1983Get full text
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Melt blending of poly(lactic acid) and poly(caprolactone): phase structure and property relationships
Published 2020Subjects: Get full text
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Blending poly(butylene succinate) with poly(lactic acid): ductility and phase inversion effects
Published 2015Subjects: Get full text
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Performance of poly alpha olefin nanolubricant
Published 2020“…The viscosity and tribological behavior of nanofluids formed by dispersed nano-diamond particles within Poly-Alpha-Olefin (PAO6) lubricant is studied at different concentrations. …”
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Crosslinking of rigid poly(vinyl chloride)
Published 1999“…The possibility of using aminosilanes and peroxides as crosslinking agents was considered and the additives used in the formulations were bis(-trimethoxysilylpropyl)amine, a blend of trimethylol propane trimethacrylate and amorphous silica, and 1,1-di-t-butylperoxy-3,3,5-trimethyl cyclohexane incorporating 40% peroxide. …”
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Chromatographic characterisation of poly (vinyl alcohol)
Published 1994“…Poly (vinyl alcohol) (PVOH), the partially hydrolysed form of poly(vinyl acetate) (PVAc), is a complex multicomponent polymer exhibiting a number of broad molecular property distributions and is therefore somewhat difficult to characterise by analytical techniques. …”
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Poly aluminium chloride as an alternative coagulant
Published 1994Get full text
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Characterization of biodegradable poly(l‐lactide) tube over accelerated degradation
Published 2020“…The aim of this paper is to study the properties of a poly(l‐lactide) (PLLA) tube over accelerated degradation in vitro. …”
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Stereocomplexation in novel degradable amphiphilic block copolymer micelles of poly(ethylene oxide) and poly(benzyl [alpha]-malate)
Published 2011“…These micelles also have a CMC value of 5.53 × 10 -3 g L -1 which is markedly lower than micelles formed from either enantiopure block copolymer (CMC values = 1.23 × 10 -2 g L -1 and 9.78 × 10 -3 g L -1 for micelles formed from PEO-b-P(l-BMA) and PEO-b-P(d-BMA) respectively).…”
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Viscoelastic behaviour of poly(methyl methacrylate) and polystyrene.
Published 2002“…In this study, Mechanical tests were carried out at a range of strain rates and temperatures using a Hounsfield H50KM Test Machine wluch provides quasi- static rates (10-4 - 10-3 S-l) and low strain rates (10-2 - 10-1 S-l), and an in-house built Dropweight Machine which provides high strain rates (102 - 103 S-l) Mechanical tests were also performed in a high-speed photographic system, which provides high strain rates (103 S-l), to visualise the deformation of the polymers at a range of temperatures. …”
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The basis of thermoforming poly(ethylene-terephthalate) containers
Published 1987Get full text
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Peroxide crosslinking of rigid poly(vinyl chloride)
Published 2008“…It is shown that premature crosslinking can be avoided during processing. It was found that 190oC was the optimum processing temperature for maximum gel content. …”
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Structure and properties relationships in poly(vinyl chloride)
Published 1979“…PVC resins were dry blended in the T.K. Fielder dry blending machine. Tin stabiliser and calcium stearate lubricant were added to the PVC to obtain clear moulded sheets. …”
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Sailing from Polis to Empire: Ships in the Eastern Mediterranean during the Hellenistic Period (PDF)
Published 2020“…These and similar questions lie behind Sailing from Polis to Empire, a fascinating insight into the practicalities of trading by boat in the ancient world. …”
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Sailing from Polis to Empire: Ships in the Eastern Mediterranean during the Hellenistic Period (XML)
Published 2020“…These and similar questions lie behind Sailing from Polis to Empire, a fascinating insight into the practicalities of trading by boat in the ancient world. …”
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Multi-layer scaffolds of poly(Caprolactone), poly(glycerol sebacate) and bioactive glasses manufactured by combined 3d printing and electrospinning
Published 2020“…Although the hydrolysis of PGS resulted in the acidification of the buffer medium (to a pH of 5.3–5.4), the release of alkaline ions from the BGs balanced that out and brought the pH back to 6.0. …”
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Optimising ductility of poly(lactic acid)/poly(butylene adipate-co-terephthalate) blends through co-continuous phase morphology
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Experimental and computational studies of poly-L-lactic acid for cardiovascular applications: recent progress
Published 2017“…This overview assesses the recent studies investigating mechanical and computational performance of poly(l-lactic) acid and its use in stenting applications.…”
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Synthesis and applications of amine-ended poly(methyl methacrylate)
Published 1997“…The use of a delocalised and sterically hindered initiator, I,I-diphenylhexyllithium in conjunction with lithium chloride has allowed the production of polymers of well defined molecular weight and narrow molecular weight distributions (Mw/Mn=1.1). …”
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Blends of Poly(ethylene terephthlate) with bisphenol-A polycarbonate
Published 1991“…Blends were made up at three levels (PETP/PC); 85/15,80/20 and 75/25 using three different molecular weights of PC, and virgid-materials were also included in the study. …”
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The processing, structure and properties of poly(1-butene) monofilaments
Published 1987“…An investigation into the structure and properties of poly(1-butene) monofilaments was carried out. Eight commercial grades of poly(1-butene) were thoroughly characterized and compared by a wide range of techniques: DSC, GPC, C13nmr, melt rheology, optical and electron microscopy, crystallization rates and crystallinity were also measured. …”
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Cross-linking of unplasticised poly(vinyl chloride) with peroxide
Published 2006“…The degree of cross-linking was measured in terms of the gel content of the material, i.e. the insoluble residue remaining after soxhlet extraction in tetrahydrofuran. …”
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Water vapour permeability of poly(lactic acid) nanocomposites
Published 2013“…A series of poly(lactic acid) (PLA) nanocomposites containing from 1 up to 6 wt% of montmorillonite layered silicate were prepared by melt compounding followed by compression moulding. …”
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Alloying of poly(vinyl chloride) to reduce plasticizer migration
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A study of chemically modified poly(vinyl butyral)
Published 1993“…The miscibility of the modified PVB with a polyester, a polyurethane, polyethylenimine and poly (vinyl pyrrolidone) was investigated by dynamic mechanical thermal analysis (DMTA). …”
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Studies of ion-containing poly(ethers) and related polymers
Published 1982“…The structure and properties of poly(vinyl alcohol), poly(methyl vinyl ether) and poly(ethyl vinyl ether) have been modified by the addition of metal salts to give single phase polymeric compounds. …”
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Synthesis and characterisation of poly(vinyl butyral) graft copolymers
Published 1997“…However, PVB and graft copolymers were seen to aggregate and this resulted in erroneously high molecular mass values. IR spectroscopy was used qualitatively and quantitatively so that the types of bonds and grafting frequencies could be obtained. 1H and 13C NMR spectroscopy were used qualitatively and 1H NMR spectroscopy was used quantitatively so that prepolymer molecular masses and graft copolymer grafting frequencies could be determined. …”
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Crystallinity and first order transition phenomena in some poly(ethers)
Published 2022Subjects: Get full text
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Aminosilane crosslinking of plasticised poly(vinylchloride) : processing, properties and characterization
Published 1994“…One way to increase the maximum temperature of plasticized PVC is to introduce a permanent chemical network. The reaction of plasticized PVC with [N-(2-amino ethyl)-3-aminopropyl trimethoxy silane] yielded si lane-grafted PVC that was crosslinked by a hydrolitic mechanism. …”
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Ceramers from aqueous polymer solutions of poly(ethylene oxide)
Published 2001“…The systems considered in this work are based on a water-soluble polymer, poly(ethylene oxide) (PEO) and silica (SiO2) networks produce by the sol-gel method. …”
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Development of a novel organoclay for poly(lactic acid) nanocomposites
Published 2009“…This thesis describes a programme of work whose aim was to develop and characterise a novel organoclay derived from montmorillonite clay and the amphoteric surfactant cocamidopropylbetaine (CAB), a plant oil derivative, and to test its compatibility with poly(lactic acid) (PLA). …”
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Synthesis and modification of hydrotalcite as a thermal stabiliser for poly(vinylchloride)
Published 2011“…In recent years there has been considerable interest in the use of synthetic hydrotalcites as stabilisers for poly(vinyl chloride) (PVC). Hydrotalcites are essentially hydrated magnesium-aluminium-hydroxy-carbonates: a typical formula being Mg6Al2(OH)16CO3.4H2O. …”
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Interpenetrating polymer networks based on natural rubber and poly(methylmethacrylate)
Published 2006“…Several series of sequential interpenetrating polymer networks using natural rubber and poly(methylmethacrylate) were prepared. Three types of IPNs known as semi-1 IPNs, semi-2 IPNs and full IPNs have been prepared at various compositions. …”
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Poly(lactic acid) nanocomposites: water barrier properties and electrospinning
Published 2016“…PLA nanocomposites containing 0 to 5 wt.% montmorillonite layered silicate were prepared. …”
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Fabricating porous poly(lactic acid) fibres via electrospinning
Published 2018Subjects: Get full text
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Structure and properties of poly(propylene oxide)-metal salt complexes
Published 1977Get full text
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Polyurethane/poly(ethyl methacrylate) interpenetrating polymer network organoclay nanocomposites
Published 2005“…Secondly, the synthesis procedure was modified by changing the order of nanoclay mixing with homopolymer components. All lPN composites were based on a composition ratio of 70PU/30PEMA, 5 wt% C20A content, 1.2 wt% of PU catalyst and 30 min mixing time. …”
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Wood adhesive from poly-phenolformaldehyde for manufacturing plywood, blockboard and chipboard
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Enhancement of protein crystallization with the application of Taylor vortex and Poly(ionic liquid)s
Published 2022“…The average crystal size in the control group was considerably lower than 1 μm with low quality (9.00 Å) and yield (56%) of crystals, but the average size of lysozyme crystals obtained using the Taylor vortex and poly(ionic liquid)s increased up to 5 μm with high quality (1.86 Å) of crystals and yield (86%). …”
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Synthesis and electrospinning of poly(ε-caprolactone) from an aluminium-based catalyst
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Compatibilization of poly(vinylidene fluoride)/nylon 6 blends by intermolecular association
Published 1996“…The neutralization of the acid groups in either polymer in the blend by addition of zinc acetyl acetonate was found to suppress the chemical reaction with the amine end groups in the N6 phase, and to cause a reduction in the T g and a reduction in crosslinking of the N 6 phase. …”
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The effect of precipitated calcium carbonate on the mechanical properties of poly(vinyl chloride)
Published 2008Get full text
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