Flexural properties of glass fiber reinforced composite with multiphase biopolymer matrix

Abstract

The aim of this study was to evaluate flexural properties of glass fiber-reinforced composites with a multiphase biopolymer matrix. Continuous unidirectional E-glass fibers were preimpregnated with a novel biopolymer of poly(hydroxyproline) amide and ester. The preimpregnated fibers were then further impregnated in a co-monomer system of Bis-GMA-TEGDMA, which formed semi-interpenetrating polymer networks (semi-IPN) with the preimpregnated polymer. After light initiated polymerization of the monomer system, rectangular shaped bar specimens (n = 4) were tested by the three-point bending test. The control material was a fiber-reinforced composite with a Bis-GMA-TEDGMA-matrix only. The mean flexural strength of poly(hydroxyproline) amide preimpregnated fiber composite was higher than that of the control (FS = 888 vs. 805 MPa). The poly(hydroxyproline) ester preimpregnated fibers resulted in lower strength (FS = 541 MPa). The results of this study suggest that preimpregnation of glass fibers with poly(hydroxyproline) amide and the use of such fibers in fiber-reinforced composites with IPN polymer matrices, can reach relatively high mechanical properties.

Fracture of fiber-reinforced composites analyzed <i>via</i> acoustic emission

“…For UFRC and MFRC specimens, 40% of the weight of the specimens consisted of fibers 31) . For this reason, the authors weighed all NRC specimens after they were prepared using a precision balance (Mettler Toledo, Switzerland) with an accuracy of 0.1 mg. After calculating their average weight, fiber content was to be added at 40% of the average weight for the FRC groups.…”

“…For UFRC specimens, the pre-weighed Stick fibers were wetted with StickResin (Stick Tech, Turku, Finland) and condensed at the bottom of the mold for optimum strength 5,31) . After curing for 40 s, BelleGlass was applied as per that described for NRC.…”

Residual monomers and degree of conversion of partially bioresorbable fiber-reinforced composite

“…poly(hydroxyproline) amide, PA) as a sizing (i.e. coating of the reinforcing glass fibers) increases the initial flexural strength and YoungÕs modulus of the FRC [3]. The FRC was made of a comonomer system of bis-phenyl glycidyl dimethacrylate (Bis-GMA)-triethylene glycol dimethacrylate (TEGDMA) non-resorbable polymer matrix and continuous unidirectional glass fibers with PA sizing.…”

Synthesis and Characterization of Polyamide of Trans-4-hydroxy-L-proline used as Porogen Filler in Acrylic Bone Cement

“…The degradable component was based on corn starch and cellulose acetate blends [18]. In the present study, the aim is to synthesize an experimental polyamide based on an amino acid of trans-4-hydroxy-L-proline that has been used as a hydrophilic pore generating material in nondegradable acrylic bone cement [19,20]. By adding the hydrophilic porogen oligomer with low molecular weight to nondegradable matrixes, it is possible to create porosity during the first week in moist conditions [21,22].…”