Glass fiber reinforcement flexural modulus

Later advances include short, glass-fiber reinforced, high-modulus (flexural modulus greater than 300,000 psi, i.e., 2070 MPa) polyurethane elastomers produced by the reinforced RIM process. These reinforced high-modulus polyurethane elastomers are considered for automotive door panels, trunk lids, and fender applications. 

Thomason JL, Vlug MA. Influence of fiber length and concentration on the properties of glass fiber-reinforced polypropylene 1. Tensile and flexural modulus. Composites Part A Applied Science and Manufacturing. 1996 27(6) 477-84. 

Since it is silica-based, glass fiber for polymer reinforcement could be thought of as a cousin to mineral fillers. But glass fiber is more carefully produced in controlled, uniform, and symmetrical shapes with extremely high aspea ratios, with particle dimensions that are (usually) visible to the human eye. Glass-fiber reinforcement is probably the most cost-effective and most proven way of reinforcing polymers to inaease tensile and flexural modulus and strength. 

Fig. 4.161 Flexural-creep modulus of glass fiber reinforced polyamide and polyphthal amide at 23 °C [12Els].

Fig. 4.164 Flexural-creep modulus of unreinforced and glass fiber reinforced poly(butylene terephthalate) with various fiber contents at 23 °C and stress level of 10 MPa [98Dom, 04Tic].

Fig. 4.171 Flexural-creep modulus of unreinforced, talcum filled and glass fiber reinforced polypropylene at 20 °C [98Dom].

Figure 4.41 Flexural modulus vs. temperature for Celanese Celanex general purpose glass fiber reinforced PBT resins [3].

Figure 4.117 Flexural modulus vs. temperature for Toray Siveras L204G35—35% glass fiber reinforced, standard grade LCP.

Figure 6.177 Flexural modulus vs. temperature for DuPont Zytel 77G33L NC010—general purpose, lubricated, 33% short glass fiber reinforced Nylon 612 resin.

Figure 6.245 Flexural modulus vs. temperature for Solvay Ixef 1022—50% glass fiber reinforced PAA resin [12].

Figure 7.54 Flexural modulus vs. temperature for PolyOne Fiberloc rigid PVC resins with different amounts of glass fiber reinforcement.

Figure 7.6 Comparison of flexural modulus of glass fiber reinforced engineering thermoplastics. Data on the unfilled resins are included for comparison. (To convert from psi to Pa multiply by 6895.)...

Response surfaces showing the effects of composition on mechanical properties are compared with the compatibilized blend and the glass-fiber-reinforced composite in Fig. 5.7 and 5.8. Regression models for the compatibilized blends are shown below the response surface graphs (Fig. 5.7, a-e) versus reinforced (Fig. 5.8, a-e) blends shows a marked difference in the nature of the responses. Most notably, the curvature in the response observed in the compatibilized blends has vanished, and the response is a function of Kraton rubber only for the flexural modulus, notched Izod impact, and tensile strength. Similarly, the heat distortion temperature is now only a linear function of Kraton and HDPE levels. Finally, elongation at break has been reduced to a single value (3.43 0.45%), as more than 90% of the variability in the data was explained by the mean value. Thus,... 

With the exception of epoxies and perfluoroalkoxy, the incorporation of 25%-50% glass fiber reinforcement leads to an improvement in flexural modulus. As shown in Table 3.2, the outstanding polymers are polyethylene terephthalate, where... 

Glass Fiber-Reinforced Polymers That Combine High Tensile Strength and Flexural Modulus... 

The tensile modulus and flexural modulus property values of phenol-resorcinol resin are reinforced with 35% glass fiber and are greatly superior to the properties of a 35% glass fiber-reinforced brominated resin bisphenol in bisphenol A-polyester resin. 

Several polymers combine excellent ultraviolet resistance with good tensile and elongation at break properties (Table 11.3). The storage modulus, alpha relaxation, and creep in polymers are influenced by electron irradiation. Thus, the creep of some polymers increased upon exposure to electron beam irradiation below 4 Mrad. Neutron/gamma irradiation also had an adverse effect on some polymer properties. Thus, some glass fiber-reinforced plastics lose 20%-40% of their flexural strength after exposure to neutron/gamma irradiation doses above 1 x 10 Gy [3]. 

Figure 6-57. A flexural modulus comparison of three glass-fiber-reinforced compounds. 

---