Buscar
Mostrando ítems 21-30 de 55
Grafting Efficiency in High-Impact Polystyrene by SEC Combined with Theoretical Predictions from a Polymerization-SEC Model
(Taylor, 2002-12)
In high-impact polystyrene (HIPS), the grafting efficiency (GE) is the mass of grafted styrene divided by the total mass of polymerized styrene. The GE along a prepolymerization was determined from the UV size exclusion ...
Mathematical Model of the Bulk Copolymerization of Styrene and acrylonitrile in the Presence of Poly(Styrene-b-Butadiene)
(Wiley VCH Verlag, 2008-12)
The bulk copolymerization of styrene and acrylonitrile in the presence of SB using BPO as initiator was investigated. Reactions were carried out at 80 8C with different initial SB concentrations. Global variables, such as ...
Evaluation of the bond strength and characteristics of zirconia after different surface treatments
(Elsevier B.V., 2018-12-01)
Statement of problem. Nonthermal plasma treatment could increase the bond strength of resin cements to zirconia, but studies are lacking. Purpose. The purpose of this in vitro study was to evaluate zirconia bond strength, ...
Instability of Styrene/Polystyrene/Polybutadiene/Polystyrene-beta-Polybutadiene Emulsions that Emulate Styrene Polymerization in the Presence of Polybutadiene
(Wiley, 2013-01)
This paper investigates the room-temperature demixing of oil-in-oil emulsions containing styrene (St), polybutadiene (PB), a St-butadiene star block copolymer (BC), and 2 polystyrene (PS) samples of different molecular ...
Composite pre-heating: Effects on marginal adaptation, degree of conversion and mechanical properties
(ELSEVIER SCI LTD, 2010)
Objectives. This study evaluated the effect of composite pre-polymerization temperature and energy density on the marginal adaptation (MA), degree of conversion (DC), flexural strength (FS), and polymer cross-linking (PCL) ...
Actin filaments modulate electrical activity of brain microtubule protein two-dimensional sheets.
(Wiley Online Library, 2020-01)
The cytoskeleton of eukaryotic cells contains networks of actin filaments and microtubules (MTs) that are jointly implicated in various cell functions, including cell division, morphogenesis, and migration. In neurons, ...
New advances in the mathematical modeling of the continuous bulk process for the production of high-impact polystyrene using multifunctional initiators
(John Wiley & Sons Inc, 2019-03)
New advances in the mathematical modeling of the bulk continuous high-impact polystyrene (HIPS) process are presented. The model consists of three modules that allow the simulation of: (1) a polymerization reactor train, ...
Rational design of an ion-imprinted polymer for aqueous methylmercury sorption
(2020-12-01)
Methylmercury (MeHg+) is a mercury species that is very toxic for humans, and its monitoring and sorption from environmental samples of water are a public health concern. In this work, a combination of theory and experiment ...
Fibrin biopolymer incorporated with antimicrobial agents: a proposal for coating denture bases
(2021-04-01)
The characteristics of the denture base surface, in combination with the oral environment, promote the colonization and development of Candida albicans biofilm, which is the main cause of denture stomatitis. This study ...