Which of the following are incorrect regarding the crystallinity and mechanical behavior of polymers? a. Semi-crystalline polymers are heat treated to increase crystallinity and improve strength O b. Strain softening happens in elastomers where the deformation gradually leads to a decrease in stiffness under constant strain rate O c. Heat treatment always results in enhanced polymer strength, modulus, and brittleness The stress-strain curve slope for totally elastic and brittle polymers is always positive d. e. Increasing the degree of crystallinity generally increases polymer strength, elastic modulus, and ductility in semi-crystalline polymers O f. As temperature is reduced, necking behavior of plastic tensile bars completely disappears

Which of the following are incorrect regarding the crystallinity and mechanical behavior of polymers? a. Semi-crystalline polymers are heat treated to increase crystallinity and improve strength O b. Strain softening happens in elastomers where the deformation gradually leads to a decrease in stiffness under constant strain rate O c. Heat treatment always results in enhanced polymer strength, modulus, and brittleness The stress-strain curve slope for totally elastic and brittle polymers is always positive d. e. Increasing the degree of crystallinity generally increases polymer strength, elastic modulus, and ductility in semi-crystalline polymers O f. As temperature is reduced, necking behavior of plastic tensile bars completely disappears

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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