$2\mathrm{.}1.$ Give an overview of a thermogravimetric analysis $($TGA$)$ and give the mechanisms of weight change during the analysis.

$2\mathrm{.}2.$ Discuss the principles of the TGA technique. $(6)$

Figure $1$: The TGA curves of $($a$)$ Polymer A$,($b$)$ Polymer B$,($c$)$ Polymer C$.$

$2\mathrm{.}3.$

$2\mathrm{.}3\mathrm{.}1.$ How many stages of weight loss are shown in Figure $1?$

$(1)$

$2\mathrm{.}3\mathrm{.}2.$ Give all the TGA stages which are undergone by Polymer A and include the temperature degradation.

$(6)$

$2\mathrm{.}3\mathrm{.}3.$ Identify all the DSC peaks in Figure $2.$

$(4)$

$2\mathrm{.}3\mathrm{.}4.$ Define the DSC analysis.

$(2)$

$4$

Figure $2$: DSC curve of the $BaZr{O}_3$ nanoparticles.