Adhesives
Mostrando 61-72 de 266 artigos, teses e dissertações.
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61. EVALUACIÓN TÉRMICA DEL CURADO DE ADHESIVOS BASE SBR USANDO PERÓXIDO DE DICUMILO
Curing is an important process in adhesive formulation, but scant reports on the study of the kinetics of curing in adhesive are currently available, particularly for formulations including styrene-butadiene copolymers. The focus of the present work was to thermodynamically quantify the curing reaction in pressure-sensitive adhesives (PSA) obtained from s
Quím. Nova. Publicado em: 2015-06
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62. Elliptical and circular bonded composite repair under mechanical and thermal loading in aircraft structures
In this study, the three-dimensional finite element method is used to achieve a comparison between the semi circular and semi elliptical patch repairs in aircraft structures. The comparison was done by the analysis of : the mechanical and thermal stress intensity factors (SIF and TSIF) at the tip of repaired crack and the distribution of the adhesive stresse
Mat. Res.. Publicado em: 28/10/2014
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63. Combined effect of thermoplastic and thermosetting adhesives on properties of particleboard with rice husk core
This study investigated the combined effect of adhesive type and content on the dimensional stability and mechanical properties of three-layer particleboards made from a mixture of wood particles (face layer: 30 wt %) and rice husk particles (core layer: 70 wt %). Two types of thermosetting adhesives, liquid urea-formaldehyde (UF) and phenol-formaldehyde (PF
Mat. Res.. Publicado em: 09/09/2014
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64. Influence of surface moisture condition on the bond strength to dentin of etch-and-rinse adhesive systems
AIM: To evaluate the immediate microtensile bond strength (µTBS) of three two-step etch-and-rinse adhesive systems applied under different dentin surface moisture conditions. METHODS: Class V cavities were prepared in seventy-two bovine incisors. Each tooth was randomly allocated into three groups, according to the adhesive system used: Single Bond 2
Braz. J. Oral Sci.. Publicado em: 2014-09
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65. Effects of solvent evaporation on water sorption/solubility and nanoleakage of adhesive systems
Objective: To evaluate the influence of solvent evaporation in the kinetics of water diffusion (water sorption-WS, solubility-SL, and net water uptake) and nanoleakage of adhesive systems. Material and Methods: Disk-shaped specimens (5.0 mm in diameter x 0.8 mm in thickness) were produced (N=48) using the adhesives: Clearfil S3 Bond (CS3)/Kuraray, Clea
J. Appl. Oral Sci.. Publicado em: 2014-07
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66. Fibrinogen and thrombin concentrations are critical for fibrin glue adherence in rat high-risk colon anastomoses
OBJECTIVE: Fibrin glues have not been consistently successful in preventing the dehiscence of high-risk colonic anastomoses. Fibrinogen and thrombin concentrations in glues determine their ability to function as sealants, healers, and/or adhesives. The objective of the current study was to compare the effects of different concentrations of fibrinogen and th
Clinics. Publicado em: 2014-04
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67. Physical and mechanical properties of particleboard bamboo waste bonded with urea formaldehyde and castor oil based adhesive
This study evaluated the physical and mechanical characteristics of particleboards made of bamboo waste from the species Dendrocalamus giganteus bonded with two different types of adhesives: urea-formaldehyde (UF) and a castor oil based adhesive (M). Thus, eight types of particleboards were produced in the proportions of 6%, 8%, 10% and 12% for each adhesiv
Matéria (Rio J.). Publicado em: 2014-03
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68. Shear bond strength of a "solvent-free" adhesive versus contemporary adhesive systems
AIM: To compare the shear bond strength (SBS) of a solvent free self-etch adhesive with solvent containing adhesives. METHODS: Forty-five human teeth were sectioned longitudinally to expose superficial dentin and substrates polished with 600-grit SiC paper. The adhesive area was isolated with a cylindrical Teflon mold 3x4 mm. Fifteen specimens were pre
Braz. J. Oral Sci.. Publicado em: 2014-03
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69. Effects of zirconia nanoparticles addition to experimental adhesives on radiopacity and microhardness
AIM: To evaluate the radiopacity and microhardness (KHN) of experimental dental adhesives (EX). The experimental adhesive resins of the present study were formulated based on the simplified adhesive system Ambar (FGM). METHODS: Five EX with different concentrations of zirconia nanoparticles [0(EX0), 15(EX15), 25(EX25), 30(EX30) e 50%(EX50)] were incorporated
Braz. J. Oral Sci.. Publicado em: 2013-12
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70. Anterior composite restorations in clinical practice: findings from a survey with general dental practitioners
Objectives: The aim of this study was to assess technical preferences of general dental practitioners when restoring anterior composite restorations. How the level of clinical experience or post-graduate training infuenced their options was also tested. Material and Methods: A cross-sectional study was performed using a questionnaire with general denta
J. Appl. Oral Sci.. Publicado em: 2013-12
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71. Fluoride Release/Uptake from Different Orthodontic Adhesives: A 30-Month Longitudinal Study
O objetivo deste estudo foi testar a hipótese nula de que não há nenhuma diferença de liberação de flúor entre cimentos de ionômero de vidro reforçados com resina (CIVRRs) e entre compósitos em longo prazo. Os materiais foram divididos em 5 grupos: um compósito não liberador de flúor - Grupo TXT (Transbond XT), um compósito liberador de flúor
Braz. Dent. J.. Publicado em: 2013-07
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72. One-Year Water Sorption and Solubility of All-in-One Adhesives
O objetivo deste estudo foi avaliar a absorção de água e a solubilidade de diferentes sistemas adesivos: Adper Easy Bond, Adper Single Bond Plus, Bond Force, Clearfil SE Bond (apenas a resina adesiva) e Xeno IV. Foram fabricados 10 discos de cada material em moldes de Teflon e foi permitida a evaporação de todos os componentes voláteis. Os discos foram
Braz. Dent. J.. Publicado em: 2013-07