eng Science and Education Publishing Journal of Polymer and Biopolymer Physics Chemistry 2373-3411 2025-08-12 13 1 1 7 10.12691/jpbpc-13-1-1 JPBPC20251311 article Ronald P. D¡¯Amelia ronald.p.damelia@hofstra.edu 1 Julia Nastasi 1 Chemistry Department, Hofstra University, Hempstead,NY Glass transition temperature (Tg), termed the ¡°softening point of amorphous materials¡± is the temperature at which an amorphous material changes from a hard, glassy state to a soft, rubbery one. As the number-average molecular weight (Mn) of the amorphous material increases, its glass transition temperature also increases, but ultimately levels off asymptotically at a maximum value labeled Tg¡Þ. Differential scanning calorimetry (DSC) was utilized to evaluate Tg for eight samples of poly t-butyl methacrylate (PtBMA) whose Mn values ranged from approximately 1K to 500K. These values were then plotted against reciprocal Mn, producing a Flory-Fox equation of Tg = 114.7°C ¨C .55 x 10 5 C.g.mol-1/Mn, with a correlation coefficient of 0.98. These experiments demonstrate the quantitative applications of DSC in evaluating the Flory-Fox equation for Poly (t-Butyl Methacrylate (PtBMA) as well as its suitability within the undergraduate chemistry laboratory. https://pubs.sciepub.com/jpbpc/13/1/1/jpbpc-13-1-1.pdf Poly tert-Butyl Methacrylate (PtBMA) Poly Methyl Methacrylate (PMMA) Flory-Fox equation glass transition temperature (Tg) Differential Scanning Calorimetry (DSC)