High impact polystyrene electron micrograph

Fig. 13. Tninsmuiidon electron micrograph of Mobil PS 4600 high impact polystyrene...

Figure 2. Transmission electron micrographs of six polybutadiene/polystyrene sequential IPN s and related materials, the polybutadiene portion stained with osmium tetroxide. Upper left high-impact polystyrene, commerciaL Upper right a similar composition made quiescently. Middle left semi-I IPN, PB (only) crosslinked. Middle right semi-II IPN, PS (only) crosslinked. Lower left full IPN, both polymers crosslinked. Lower right full IPN, PB with higher crosslink level. (Reproduce from ref. 5. Copyright 1976 American Chemical Society.)...

Fig. 12.7 The morphology of high-impact polystyrene (HIPS) a transmission electron micrograph, showing dispersed eiastomer particies ( 22 pm in diameter) with poiystyrene occlusions. (Courtesy of Dow Chemicai Company.)...

Figure 3.3. Electron micrograph (replica) of a graft-type high-impact polystyrene with polybutadiene as the rubbery component (Keskkula and Traylor, 1967). In the absence of agitation, phase inversion does not occur, and an interwoven cellular structure results, with polybutadiene remaining as the continuous phase. The specimen was prepared for electron microscopy by exposing a polished surface to isopropanol vapor, which preferentially swells the polystyrene phase a double replication technique was then used. The reader should compare the results obtained by this technique to results obtained using thin-section transmission techniques (see, for example. Figure 3.2).

Figure 3.27. Scanning electron micrographs of fracture surfaces of high-impact polystyrene subjected to cyclic loading (10 Hz). (a,b) Crack propagation rate 2.5 x lO"" cm/cycle X 2300. (c) Crack propagation rate -2.5 x 10" cm/cycle x 1830. (d) Crack propagation rate — 2.5 X 10" cm/cycle x 8000. (Manson and Hertzberg, 1973b.)...

Figure 17 Transmission electron micrograph of a microtomed section of osmium tetroxide-stained high impact polystyrene showing inclusions in the rubber particles and crazing...

Fig. 18. Electron micrograph of a blend system of 75/25 polystyrene/SBS tri-block under a relatively high level of impact stress. Arrows show the direction of the impact tensile strain, (by courtesy of Dr. S.L. Aggarwal, General Tire Rubber Co.)...

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