Retention of tensile strength

Hours to 50% retention of initial tensile strength under carbon arc exposure, kj /m to 50% retention of tensile strength Florida under glass exposure. 

Reagent Retention of tensile strength (%) Retention of FS (%) Retention of EBC (%) Appearance Performance Retention of tensile strength (%) Retention of FS (%) Retention of EBC (%) Appearance Performance... 

Figure 4.34. PVC examples of retentions of tensile strengths (TS,%) and elongations break (EB,%) versus temperature (°C)...

For three- and ten-year outdoor exposures of 3-mm-thick samples, retentions of tensile strength and elongation at break can be, for example ... 

After 15-year outdoor exposures of 0.1-0.15 mm thick films, the retentions of tensile strengths and elongations at break range from 91% up to 125% without visible change. These results are examples only and cannot be generalized. 

After 7 days of exposure in air at 230°C, retentions of tensile strength, elongation at break and dielectric strength are more than 90%. 

When the temperature rises, polyphenylene sulfide can be attacked by hot strong acids and bases, chlorinated solvents, oxidizing agents, halogens, amines. For example, a given grade is unusable after a few months in 10% nitric acid at 90°C. After 1 year at 90°C in 37% hydrochloric acid, the retention of tensile strength is 29%. 

Figure 4.124 shows two examples of the retention of tensile strength and elongation at break for a film exposed to the Weather-Ometer. 

Tensile Testing. Tensile tests were run on an Instron 1000 using a 5.08 cm (2 Inch) guage length and a speed of 12.7 cm (5 lnches)/mln. The procedures In Burlington Test Procedure FP-015 (ASTM-D-579) were followed. At least 5 specimens of each sample were tested. Fabric tests results are quoted for the warp direction only. The percent retention of tensile strength was calculated from the equation % retention where F and F(j are the... 

The performance of polyblends is quite consistent with that of the two components alone. This might be expected owing to the high degree of ultraviolet transparency of each of the components polymers (Figure 10). Their retention of tensile strength and elongation is limited by the... 

Glass fiber PES, PEEK Tensile strength Improved retention of tensile strength 71... 

Results of some of these short-term tests are shown in Table II. A comparison is given between PPS and five other plastics nylon (Zytel 101), polycarbonate (Lexan 141), polysulfone (Bakelite Polysulfone), polyphenylene oxide (Noryl), and polyetherimide (Ultem 2300). The data presented are based upon retention of tensile strength for all plastics except the Ultem 2300, which is based upon retention of flexural strength. Unsuccessful attempts were made to injection mold ASTM Type IV tensile bars out of the Ultem compound, but flexural strength bars could be made. Experience has shown that chemical resistance tests monitored by flexural strength retention are comparable to those monitored by retention of tensile strength. 

Figure 7. Light stability of polypropylene tapes (Florida) KLY to 50% retention of tensile strength.

Table 5. Florida Exposure of HDPE Tapes KLY to 50% Retention of Tensile Strength...

Table III. Retention of Tensile Strength at Elevated Temperatures...

Increased oxyethylene group content in the polyol results in improved stability as reflected in better retention of tensile strength with thermal exposure. In turn, this coincides with better retention of the weight average molecular weight of the polymers as determined by GPC measurements. 

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