1.   The relations derived in this and other chapters normally assume that the polymer sample has a unique molar mass.

2.   The extent of sample crystallinity can influence the behaviour of a polymer sample greatly.

3.   The occurrence of significant crystallinity in a polymer sample is of considerable consequence to a materials scientist.

4.   However, a polymer sample is rarely completely crystalline and the properties also depend on the amount of crystalline order.

5.   Chain symmetry and flexibility both affect the crystallinity of a polymer sample.

6.   The first attempts to explain the crystalline structure of a polymer sample produced a model called the fringe-micelle structure.

7.   The polymer sample is placed in the bulb of a dilatometer, degassed, and a confining liquid such as mercury added.

8.   The polymer sample is described as an ensemble of co-operative regions, or subsystems, each containing monomeric segments.

9.   The onset of molecular motion in a polymer sample is reflected in the behaviour of E and E.