Polystyrene glass fiber filled

In addition to blending with additives, glass and carbon fiber reinforcements are used to enhance the stiffhess and the strength of polystyrenes. Thetmofil and RTF supply commercial glass fiber filled polystyrenes. RTF also sirpplies carbon fiber filled polystyrenes. 

In the case of glass fiber filled polystyrene [28], the loading level is limited to 10% and 22% and hence whether a reversal of the type that was observed in Figure 7.13 for PC takes place cannot be established. 

Capillary Rheometer and an Extruder Are They in Agreement One can ask a reasonable question If rheology data are obtained in a capillary rheometer, are they applicable to an extruder To answer this question, at least for a specific set of conditions, a direct comparison was made [31]. It was found that the capillary rheometer and extruder are in good agreement for neat plastics (polystyrene and polypropylene), but extruder systematically measures lower viscosities in glass-fiber-filled plastics. 

In general, rigid plastics are superior to elastomers in radiation resistance but are inferior to metals and ceramics. Examples of materials, which will respond satisfactorily in the range of 10 and 10 erg per gram, are fluoroplastics, glass fiber-filled phenolics, certain epoxies, polyurethane, polystyrene, mineral-filled polyesters, silicone, and fiirane resins. The next group of resins in order of radiation resistance includes polyethylene, melamine, urea formaldehyde resins, unfilled phenolic, and silicone resins. Those materials, which have poor radiation resistance, include methyl methacrylate, imfilled polyesters, cellulosics, polyamides, and fluorocarbons (Tables 9.16 and 9.17). 

Epoxies High Performance Resins Cast, Rigid Polycarbonate (40% glass fiber reinforced) Polystyrenes Molded Styrene acrylonitrile (SAN) Polypropylene Asbestos filled 0.0055—0.0074 0.006 >0.006 0.007... 

Y. Chan, J.L. White, Y. Oyanagi. A fundamental study of the rheological properties of glass fibers filled polyethylene and polystyrene melts. /. Rlteol., 22,507-524,1978. 

Reinforced Polyester Sheet molding compounds, general purpose Polystyrenes Molded Glass fiber (30%) reinforced SAN Diallyl Phthalates Molded Dacron Filled Polycarbonate 0.0086—0.022 0.009 0.009—0.017 (Wet) 0.01... 

Glass filled polystyrene Glass filled polyester Graphite fiber filled nylon Glass filled ABS materials Glass filled polycarbonate Silica filled epoxy... 

Figure 7.3(b) Variation of relaxation time with shear rate for polystyrene melt filled with glass fiber. (Reprinted from Ref. 14 with kind permission from John Wiley Sons. 

The method of incomplete mold filling is effective for investigating injection molding of fiber glass-loaded polypropylene and polystyrene melts.283 After solidification, samples were prepared for microscopic investigation. The authors determined the distribution and orientation of the fibers in different sections of the article and thus were able to clarify the pattern of flow in different parts of the mold as a function of the process parameters. They concluded that the width of the (cavity)... 

---