From the stress-strain data for poly(methyl methacrylate) shown in Figure 15.3,

Question

From the stress-strain data for poly(methyl methacrylate) shown in Figure 15.3, determine the modulus of elasticity and tensile strength at room temperature [20 degree C (68 degree F)], and compare these values with those given in Table 15.1. The influence of temperature on the stress-strain characteristics of poly(methyl methacrylate). (From T. S. Carswell and H. K. Nason, "Effect of Environmental Conditions on the Mechanical Properties of Organic Plastics," Symposium on Plastics, American Society for Testing and Materials, Philadelphia, 1944. Copyright, ASTM, 1916 Race Street, Philadelphia, PA 19103. Reprinted with permission.) Room-Temperature Mechanical Characteristics of Some of the More Common Polymers

Explanation / Answer

approximate answer=> modulus of elasticity=tensile stress/tensile strain=30/0.02=1500 Mpa {is far greater the given in the table}

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