Influence of glass fiber wt% and silanization on mechanical flexural strength of reinforced acrylics
Carregando...
Data
2014
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The aim is to evaluate the flexural strength of acrylic resin bars depending on the addiction of glass fibers with
or without previous 3-methacryloxypropyl-trimethoxysilane (silane) application. Short fibers (3 mm) were treated
and added to an acrylic resin powder, being further mixed with acrylic liquid to create bars (25 × 2 × 2 mm) of
11 experimental groups (N = 10), according to the interaction of experimental factors: weight % of glass fibers:
(0.5; 1; 3; 4; 6 and 7) and silane application (with silane (S) or without silane (N)). Flexural strength and scanning
microscopy evaluation were performed (SEM). Data (MPa) were submitted to ANOVA and Tukey (α = 5%).
A significant difference between groups was observed (p = 0.001): S7%(128.85 ± 35.76)a, S6% (119.31 ± 11.97)ab,
S4% (116.98 ± 25.23)ab, N4% (107.85 ± 24.88)abc, S1% (96.29 ± 20.65)bc, S0.5% (89.29 ± 7.33)cd, S3% (89.0 ±
11.27)cd, N3% (86.79 ± 17.63)cd, N1% (85.43 ± 16.44)cd, Control (73.29 ± 25.0)de, N0.5% (59.58 ± 19.46)e. For N
groups, it was not possible to include more than 4%wt fibers. SEM showed better fiber-resin interaction for S
groups, and fractures around fibers on N groups. Previous silane application enables the addiction of greater
quantity of glass fibers and better interaction with the acrylic resin resulting in higher flexural strength. Without
silane, fibers seem to act as initial crack points due to poor interaction.
Descrição
Palavras-chave
Glass fibers, Reinforcement, Silane, Acrylic resin, Flexural strength
Citação
FONSECA, Rodrigo B. et al. Influence of glass fiber wt% and silanization on mechanical flexural strength of reinforced acrylics. Journal of Materials Science and Chemical Engineering, Wuhan, v. 2, n. 2, p. 11-15, 2014.