Maleic Acid
Mostrando 1-12 de 38 artigos, teses e dissertações.
-
1. SELECTIVE SEPARATION OF Mn(II) AND Cd(II) AS WELL AS REGENERATION OF POLYMER VIA SHEAR INDUCED DISSOCIATION COUPLING WITH ULTRAFILTRATION
Abstract The selective separation of Mn(II) and Cd(II) as well as regeneration of the complexing agent were conducted by shear induced dissociation coupling with ultrafiltration (SID-UF), and the copolymer of maleic acid and acrylic acid (PMA) was used as complexing agent. At the optimal complexation conditions, pH 6 and P/M (mass ratio of polymer to metal i
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
-
2. Membranas Compuestas: propiedades superficiales y estabilidad térmica
ABSTRACT The composite membranes were manufactured with crosslinking poly(vinyl alcohol) on polyethersulfone porous membranes by coating process. PES membranes were exposed to air plasma for the purpose of surface modification. The coating of the support membrane was carried out by using a polymer matrix with a crosslinking agent. The physico-chemical proper
Matéria (Rio J.). Publicado em: 19/07/2018
-
3. Effect of PANI on Thermal, Mechanical and Electromagnetic Properties of HDPE/LLDPE/PANI Composites
In this work, polyaniline (PANI) in emeraldine-base form, synthesized by chemical oxidation polymerization, was protonated with hydrochloric acid (HCl). Composites based on high-density polyethylene (HDPE) and linear-low density polyethylene (LLDPE) blends with PANI were prepared in molten condition using a torque rheometer. The effect of compatibilizer agen
Mat. Res.. Publicado em: 11/12/2017
-
4. Preparation of Two Maleic Acid Sulfonamide Salts and Their Copper(II) Complexes and Antiglaucoma Activity Studies
Two novel proton transfer compounds (HAP)+(SAMAL)- and (HBI)+(SAMAL)-.H2O were obtained from (E)-4-oxo-4-(4-sulfamoylphenylamino)but-2-enoic acid (HSAMAL) and 2-aminopyridine (AP) or 1H-benzimidazole (BI), respectively. Copper(II) complexes of salts and of HSAMAL have also been prepared. They have been characterized by elemental, spectral, thermal analyses,
J. Braz. Chem. Soc.. Publicado em: 2016-10
-
5. Maleic Anhydride as a Compatibilizer and Plasticizer in TPS/PLA Blends
In recent decades, starch has been studied as a raw material due to low production costs. The limitations associated with starch being highly permeable to water vapor and its mechanical properties being dependent on the relative humidity have been investigated. The proprieties of thermoplastic starch/poly(lactic acid) (TPS/PLA) blends have been studied by
J. Braz. Chem. Soc.. Publicado em: 2015-08
-
6. Vinegar rice (Oryza sativa L.) produced by a submerged fermentation process from alcoholic fermented rice
Considering the limited availability of technology for the production of rice vinegar and also due to the potential consumer product market, this study aimed to use alcoholic fermented rice (rice wine (Oryza sativa L.)) for vinegar production. An alcoholic solution with 6.28% (w/v) ethanol was oxidized by a submerged fermentation process to produce vinegar.
Food Sci. Technol. Publicado em: 2015-03
-
7. Apical microleakage of different root canal sealers after use of maleic acid and EDTA as final irrigants
This study aimed to compare the effects of ethylenediaminetetraacetic acid (EDTA) and maleic acid (MA) on the sealing ability of various root canal sealers. Eighty root canals were instrumented and irrigated with either EDTA or MA. They were divided into eight experimental groups and obturated as follows: Group 1: MA + Hybrid Root SEAL/gutta-percha. Group 2:
Braz. oral res.. Publicado em: 15/09/2014
-
8. High performance maleated lignocellulose epicarp fibers for copper ion removal
Natural lignocellulosic fiber epicarp extracted from the babassu coconut (Orbignya speciosa) was chemically modified through reaction with molten maleic anhydride without solvent, with incorporation of 189.34 mg g-1 of carboxylic acid groups into the biopolymer structure. The success of this reaction was also confirmed by the presence of carboxylic acid band
Braz. J. Chem. Eng.. Publicado em: 2014-03
-
9. Funcionalización de polietileno de baja densidad con anhídrido maleico en estado fundido
In this study, low density polyethylene (LDPE) was modified with maleic anhydride (AM) in the molten state by using different concentrations of dycumil peroxide (DCP) (0.25, 0.50, 0.75 and 1.0 %). The materials obtained were characterized by gel content, acid-base titrations, infrared spectroscopy (IR), differential scanning calorimetry (DSC), thermogravimet
Polímeros. Publicado em: 2014
-
10. Study of the compatibilizer effect in the properties of starch/polyester blends
The mechanical, viscoelastic and structural properties of starch/ poly (butylene adipate co-terephthalate) (PBAT) blown films produced by reactive extrusion were evaluated using citric acid (CA) and maleic anhydride (MA) as compatibilizers. Scanning electron microscopy images showed more homogeneous structure when CA and MA were included in the formulation.
Polímeros. Publicado em: 18/06/2013
-
11. Effect of compatibilization and reprocessing on the isothermal crystallization kinetics of polypropylene/wood flour composites
Numerous studies have focused on polymer mixtures aimed at the potential applications of these materials. This work analyzed the effect of polymer reprocessing and the type and concentration of compatibilizer on the isothermal crystallization kinetics of polypropylene/wood flour composites. The composites, which were polypropylene grafted with acrylic acid (
Polímeros. Publicado em: 28/05/2013
-
12. Caracterização de estado sólido e análise computacional de uma nova forma cristalina do fármaco antifilariose dietilcarbamazina: um sal de ácido maleico / Characterization of solid state and computational analysis of a new crystalline form of the antifilarial drug diethylcarbamazine: a maleic acid salt
A caracterização no estado sólido de insumos farmacêuticos constitui uma parte muito importante no entendimento de suas propriedades físicas, químicas e farmacológicas. A partir da análise estrutural por difração de raios X em monocristal, pode-se identificar a conformação no estado sólido do fármaco, assim como sua densidade eletrônica. Estes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/08/2011