Search results for "Propylene"

showing 10 items of 285 documents

Solidification of Polypropylene Under Processing Conditions – Relevance of Cooling Rate, Pressure and Molecular Parameters

2012

Settore ING-IND/24 - Principi Di Ingegneria ChimicaSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiSolidification polypropylene polymer processing crystallization kinetics
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HUMAN FIBRIN GLUE SEALING VERSUS SUTURE POLYPROPYLENE FIXATION IN LICHTENSTEIN INGUINAL HERNIORRAPHY: A PROSPECTIVE OBSERVATIONAL STUDY.

2014

Background: Patients who underwent primary inguinal hernia repair still report a high rate of postoperative pain after operation due to effect of mesh fixation by suture. An alternative is the use of human fibrin glue. We compared the two techniques. Methods: 468 patients randomly underwent primary inguinal hernia Lichtenstein repair fixing the mesh by suture or by human fibrin glue (HFG); in both cases themesh was fixed to the posterior wall of the inguinal canal and to the inguinal legament. results: No significant differences were recorded between the two groups in terms of complications, while the sutureless technique reduces the operative time and the postoperative pain. Conclusions: A…

Settore MED/18 - Chirurgia Generalepolypropylene hernia mesh Lichtenstein inguinal herniorrhaphy human fibrin glue
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The use of a tailored mesh with special design for ventral hernia repair. Preliminary report

2009

Introduction: The study describes a modified technique for ventral hernia repair based upon a tension free, fixation free, and dynamic compliant implant. Material and methods: A unique geometrical shaped light weighted, large porous polypropylene mesh was created consisting of a large central body and six radial arms, designed to pass through the tissues and hold the mesh in place without tension. We used the mesh in a small exploratory cohort of patients with ventral hernia. The mesh was placed sublay by taking each of the six straps and passing from below the muscle, through the muscle allowing the fixation free strap to sit with friction within the tissues. This was designed to give a te…

Settore MED/18 - Chirurgia Generaleventral hernia polypropylene mesh
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Novel silicon microparticles to improve sunlight stability of raw polypropylene

2015

Oxidation of polyolefins by ultraviolet/visible irradiation is a significant limitation for their use in several technological applications. The use of high-tech additives such as silicon microparticles becomes a compositing strategy that can improve the performance of these materials at long-term service conditions. Silicon particles were added to non-additivated raw polypropylene (PP) prepared by hot melt extrusion and subjected to accelerated sunlight irradiation tests. The stability of thermal properties, mechanical performance and thermal decomposition behaviour of composites was evaluated by differential scanning calorimetry, dynamic mechanical thermal analysis and thermogravimetry. T…

Silicon microparticlesSunlight irradiationNear-IR reflective pigmentSolucions polimèriquesMaterials sciencePolymers and PlasticsSiliconGeneral Physics and Astronomychemistry.chemical_elementCompositechemistry.chemical_compoundCIENCIA DE LOS MATERIALES E INGENIERIA METALURGICAMaterials ChemistryThermal stabilityThermal analysisComposite materialPhotodegradationThermal analysisPhoto-degradationPlastic additivesPolypropyleneTermoplàsticsOrganic ChemistryThermal decompositionPolyolefinPolyolefinThermogravimetrychemistryMAQUINAS Y MOTORES TERMICOSPolypropyleneEuropean Polymer Journal
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Advanced fragmentation stage of oxide coating on polymer substrate under biaxial tension

2005

Crack patterns of 100-nm-thick silicon oxide coating on polypropylene film subjected to equibiaxial stress loading are studied experimentally. The loading is achieved by means of a bulging cell mounted under an optical microscope with stepwise pressurization of film specimens. The evolution of the coating fragment area distribution at relatively high strains is modeled using Weibull statistics to describe the coating strength. The fragment area distribution at an advanced fragmentation stage is shown to scale with the average fragment area, the latter being a power function of the applied biaxial strain.

Silicon oxidePolypropyleneMaterials sciencePolymersMetals and AlloysBiaxial tensile testSurfaces and Interfacesengineering.materialSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialslaw.inventionchemistry.chemical_compoundchemistryOptical microscopeCoatingFragmentationCoatingslawMaterials ChemistryengineeringPolymer substrateThin filmComposite materialSilicon oxideWeibull distributionThin Solid Films
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CCDC 132983: Experimental Crystal Structure Determination

2001

Related Article: M.Hernandez-Padilla, E.Chinea, S.Dominguez, A.Mederos, M.C.Munoz, F.Lloret|2000|Polyhedron|19|1175|doi:10.1016/S0277-5387(00)00362-4

Space GroupCrystallography(13-propylenediamine-NNN'N'-tetraacetate)copper(ii) hexaaquamanganese(ii) dihydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 177730: Experimental Crystal Structure Determination

2005

Related Article: C.Vinas, J.Llop, F.Teixidor, R.Kivekas, R.Sillanpaa|2005|Chem.-Eur.J.|11|1933|doi:10.1002/chem.200400445

Space GroupCrystallography3-(eta^5^-Pyrrolyl)-12-(13-propylene)-12-dicarba-3-cobalta-closo-dodecarboraneCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 293343: Experimental Crystal Structure Determination

2006

Related Article: J.-P.Costes, R.Gheorghe, M.Andruh, S.Shova, J.-M.C.Juan|2006|New J.Chem.|30|572|doi:10.1039/b518029e

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters(mu~2~-NN'-bis(3-Methoxysalicylidene)propylenediamine)-bis(isothiocyanato)-copper(ii)-cobalt(ii)Experimental 3D Coordinates
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CCDC 258414: Experimental Crystal Structure Determination

2005

Related Article: E.Pardo, M.-C.Dul, R.Lescouezec, L.-M.Chamoreau, Y.Journaux, J.Pasan, C.Ruiz-Perez, M.Julve, F.Lloret, R.Ruiz-Garcia, J.Cano|2010|Dalton Trans.|39|4786|doi:10.1039/b926709c

Space GroupCrystallographyCrystal Systemtris(mu~4~-NN'-13-Phenylenebis(oxamate))-hexa-aqua-hexakis(dipropylenetriamine-NN'N'')-octa-nickel(ii) tetraperchlorate hydrateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 675470: Experimental Crystal Structure Determination

2009

Related Article: V.Costa, R.Lescouezec, J.Vaissermann, P.Herson, Y.Journaux, M.H.Araujo, J.M.Clemente-Juan, F.Lloret, M.Julve|2008|Inorg.Chim.Acta|361|3912|doi:10.1016/j.ica.2008.03.044

Space GroupCrystallographycatena-(tris(mu~2~-Cyano)-tricyano-bis(hydrogen tris(pyrazolyl)borato)-(dipropylenetriamine)-di-iron(iii)-nickel(ii) dihydrate)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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