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

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A: The rigid type of plastic which is highly resistant to high temperature form the Bakelite.

Q: Which statement is correct regarding the structure of polymers? Oa. Degree of crystallinity and…

A: It is asked to provide correct state ment from the options

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Q: sketch the generalized stress-strain curve for a semi-crystalline thermoplastic polymer.

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Q: Question 12 An example of a composite material is: o Mercury o Polyvinylchloride o Wood o An…

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Q: Problem 5 Compare thermoplastic and thermosetting polymers (a) on the basis of mechanical…

A: *Answered and explained already above.

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Q: Which of the following statements is incorrect regarding the mechanical characteristics of polymers?…

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Q: Which one below is true for thermoplastic polymers? * O They do not soften when heated and do not…

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A: Thank you.

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A:

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