Illustrate the influence of the thermal history on the measurements. Why is the melting behaviour of PE fibres different in the second heating? Illustrate this with the DSC trace. What is the difference between a side group and a side chain? What is a shish kebab structure? Discuss the influence of processing on the material properties. An LLDPE sample was annealed at different temperatures. How would you explain the DSC trace after annealing? What is the influence of tacticity on the material properties of PP? Illustrate this with DSC thermograms. Give common applications of these materials (commodity plastics)