Question

Short answers

9. When cooling a polymer after plasticating it, we have to remove the excess energy from the part allowing it to reach room temperature. What molecular properties of the polymer will define how much energy must be removed for the part to cool down? 10. Why do the enthalpy diagrams for the melting of indium and low density polyethylene differ from one another? What does the breadth of the melting peak tell us about the polymer under study? 11. Why is the polymerization of diamines with dicarboxylic acids spontaneous, despite the fact that the process dramatically increases the order of the system as the bonds form?

Answer 1

Q.9

In the question cooling of polymer after plasticating it, much of energy will be extracted from polymer because it deals with the thermoplastic related material.

This cooling process involves to give the proper shape to a material. Cooling process is done because to remove the unacceptable distortion occur in plastic material during solidification process, so we have to maintain room temperature for give new shape.