Exploració per tema "Cristal·lització"
Ara es mostren els items 1-20 de 68
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Aliphatic polyamides (nylons): Interplay between hydrogen bonds and crystalline structures, polymorphic transitions and crystallization
(Wiley, 2021-08-13)
Article
Accés obertAliphatic polyamides (nylons) constitute a family of polymers with outstanding properties and multiple applications. Despite the intensive research studies carried out with nylons, there are still multiple unsolved questions ... -
Aplicación de la espectroscopía de infrarrojo para el estudio de procesos de cristalización y polimerización. Aplicación de nuevos materiales derivados de ácido glicólico
(Universitat Politècnica de Catalunya, 2009-11)
Projecte/Treball Final de Carrera
Accés obertEn el presente Proyecto Final de Carrera se realiza la síntesis de las sales de sodio, potasio y cesio del ácido N-cloroacetil-6-aminohexanoico y se estudia su reactividad mediante espectroscopia de infrarrojo de reflexión ... -
Biphasic polylactide/polyamide 6,10 blends: Influence of composition on polyamide structure and polyester crystallization
(Elsevier, 2020-08-12)
Article
Accés obertBlends with different ratios of polylactide and polyamide 6,10 (PA610) have been prepared by melt-mixing using a Brabender mixer equipment. Previously, a rheologically modified polylactide (PLAREx) was obtained through ... -
Brill transition and melt crystallization of nylon 56 an odd-even polyamide with two hydrogen-bonding directions
(Elsevier, 2010-11-12)
Article
Accés restringit per política de l'editorialBrill transition and crystallization behaviour of nylon 56, a representative polymer of odd–even polyamides, were investigated by simultaneous WAXD and SAXS synchrotron radiation. Nylon 56 crystallized from solution into ... -
Bycrystal interface energy computation of growth and alignment of facets in nanocrystalline cooper
(Universitat Politècnica de Catalunya, 2017-09-22)
Treball Final de Grau
Accés restringit per decisió de l'autor
Realitzat a/amb: University of Colorado Colorado SpringsGrain boundaries are of great importance in polycrystalline materials on account of the major influence they have on their properties and behavior. Deformation twining, interface sliding, recrystallization or microstructure ... -
Characteristic time of strain induced crystallization of crosslinked natural rubber
(Elsevier, 2012-06)
Article
Accés obertReal time Wide-Angle X-ray Scattering (WAXS) measurements during cyclic tensile tests at high strain rates (from 8 s-1–280 s-1) and at room temperature on crosslinked Natural Rubber (NR) are performed thanks to a specific ... -
Cinètica poblacional de processos de cristal·lització i recristal·lització
(Universitat Politècnica de Catalunya, 2002-05-21)
Tesi
Accés obertEls materials nanocristal·lins han esdevingut darrerament un dels camps de recerca més actius en l'àrea de la Ciència de Materials. Aquest tipus de materials, caracteritzats per la presència d'estructures organitzades de ... -
Controlling the isothermal crystallization of isodimorphic PBS-ran-PCL random copolymers by varying composition and supercooling
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-01-01)
Article
Accés obertIn this work, we study for the first time, the isothermal crystallization behavior of isodimorphic random poly(butylene succinate)-ran-poly(e-caprolactone) copolyesters, PBS-ran-PCL, previously synthesized by us. We perform ... -
Cristalización de una nueva poliamida impar-par: Nylon 7,10
(Universitat Politècnica de Catalunya, 2021-10-22)
Treball Final de Grau
Accés restringit per decisió de l'autorL'objectiu principal d'aquest Treball Final de Grau és l'estudi de la cristal·lització d'una nova poliamida, tipus AABB, diferent a les poliamides convencionals del tipus parell, parell (per exemple, el niló 6, 6). En ... -
Crystal polymorphism of polylactides and poly(Pro-alt-CO): The metastable beta and gamma phases. Formation of homochiral PLLA phases in the PLLA/PDLA blends
(Elsevier, 2017-04-21)
Article
Accés restringit per política de l'editorialAmong the various crystalline phases of polylactides, an elusive orthorhombic gamma phase (¿PLLA) had been obtained so far only by epitaxial crystallization on hexamethylbenzene. A recent work by J. Shao et al. (Macromolecules, ... -
Crystalline structures and structural transitions of copolyamides derived from 1,4-diaminobutane and different ratios of glutaric and azelaic acids
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-04-01)
Article
Accés obertCopolyamides derived from even 1,4-butanediamine and different mixtures of odd dicarboxylic acids with a great difference in the number of methylene groups (i.e., glutaric and azelaic acids with 3 and 7 groups, respectively) ... -
Crystallization kinetics of chain extended poly(L-lactide)s having different molecular structures
(2020-01-15)
Article
Accés obertPoly(L-lactide)s (PLLAs) with different chain structures were prepared by reactive melt processing and using Joncryl ADR as chain extender. Results of gel permeation chromatography (GPC) revealed that chain extended PLLAs ... -
Crystallization of microparticulate pure polymorphs of active pharmaceutical ingredients using CO 2-expanded solvents
(2012-04-04)
Article
Accés obertThe feasibility of the Depressurization of an Expanded Liquid Organic Solution (DELOS) method to process different active pharmaceutical ingredients (APIs) as finely divided powders with narrow particle size distribution, ... -
Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
(Wiley, 2019-01-01)
Article
Accés obertThe aim of this study was to gain a better understanding of the crystallization behavior of triethyl-citrate-plasticized poly(lactic acid) (PLA–TEC) in the presence of chitin nanocrystals (ChNCs). The isothermal crystallization ... -
Crystallization study on CuZr alloys with fixed stoichiometry and different microstructures (amorphous or nanocrystal line)
(Universitat Politècnica de Catalunya, 2013-07-19)
Projecte Final de Màster Oficial
Accés obertGlasses are solid materials characterized by their lack of long range order, that is, solids with a liquid-like structure. Besides the common silica-based glasses conventionally used in windows, glasses obtained with ... -
Crystallization, phase evolution and corrosion of Fe-based metallic glasses: An atomic-scale structural and chemical characterization study
(2014-06-01)
Article
Accés restringit per política de l'editorialUnderstanding phase changes, including their formation and evolution, is critical for the performance of functional as well as structural materials. We analyze in detail microstructural and chemical transformations of the ... -
Crystallization, processing and applications of new polyesters
(Universitat Politècnica de Catalunya, 2015-05-06)
Tesi
Accés obertPoly(alkylene dicarboxylate)s constitute a family of biodegradable polymers with increasing interest for both commodity and speciality applications. The most of these polymers can be prepared from biobased diols and ... -
Disappearance of melt memory effect with comonomer incorporation in isodimorphic random copolyesters
(American Chemical Society (ACS), 2023-09-21)
Article
Accés obertMelt memory effects in polymer crystallization have attracted much attention in the past few years. Although progress has been made in understanding how the chemical structure of polymers can affect melt memory, there are ... -
Disseny de sistemes d’agitació industrial aplicat als processos de fermentació i cristal·lització
(Universitat Politècnica de Catalunya, 2020-07-14)
Treball Final de Grau
Accés restringit per acord de confidencialitat -
Effect of liquefynig crystallized honey through an ultrasound bath
(Universitat Politècnica de Catalunya, 2010-06)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorCrystallization of honey is a common process of the honey industry. Liquid honey is preferred by most of the consumers and by food companies for ease of handling and a better method compared to expensive and time-consuming ...