Transition regions are narrow temperature intervals over which the properties of a polymer change by a large amount. The most important examples are the glass transition and the crystal melting transition. Most semicrystalline polymers exhibit their most useful properties between the temperatures of the glass transition, Tg, and the crystal melting point, Tm
David Whisnant (Wofford College). Partial support for this work was provided by the National Science Foundation's Division of Undergraduate Education through grants DUE #9950809 and DUE #9950296. Additional support was provided by the Camille and Henry Dreyfus Foundation.