"you are asked to perform a survey in a region of the country you haven't worked in before. so, you look on the map that is maintained by the public land survey system for one of the two main reference lines you will need. the reference line you are looking for for a true north to south reference is called the . this is on the plss maps maintained by ngs"

Describe one experiment in which the glass transition temperature and melting temperature of a totally amorphous thermoplastic material can be determined. show the relevant experimental results in a diagram which should be properly annotated with the two temperatures clearly marked. what is likely to happen to the curve in the diagram if the amorphous polymer is replaced by a thermosetting type?