the curve of modulus versus temperature shown below. From the DSC, what can you

Question

the curve of modulus versus temperature shown below. From the DSC, what can you say about the polymer, and what event caused the change in modulas circled in the plot. (6) In addition, the material was tested in the DMA, generating 6. A DSC scan is shown below. 10 TYPE . Thermoset . Thermoplastic . Amorphous . Semi-crystalline 4op 3eo STATE . Incompletely Crystallized Incompletely Cured . Volatile . Plasticizer . Multiple Crystalline 50 100 10200 250 300 400 Morphologies Temperature ("C) . Multiple Polymers or Monomers Present

Explanation / Answer

firstly by increasing temperature, the modulus was reduced and after a certain temperature, it was increased so that we can say that the material is a thermosetting plastic.And from the given values we can say that the given material is polycarbonate (amorphous).in general strength and stiffness decrease with increase in temperature while the elongation at breaking point will increase that implies we can say that the ductility will increase with temperature.and because of the crystalline structure and uniformity in the arrangement of crystals at some temperature the modulus will become uniform that we can see from the given graph.

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