Analysis of high polymers

Piezoelectric crystal thermogravimetric analyzer for temperature-programmed analysis of deposited films

“…Subsequent measurements using high-quality 5.0-MHz crystals, the second prototype instrument, and computer data acquisition under programmed temperature conditions showed the variation between successive heating cycles to be on the same order as the noise in a single background or about 1 to 2 times the digitization error for the frequency. At 1-s acquisition times, the error was [2][3][4][5] Hz while at 0.1-s acquisition times the error was 10-20 Hz. The background data were subjected to least-squares curve fitting of first through fifth orders.…”

“…Thermogravimetry (TG) has developed into an important analytical technique since its introduction by Honda in 1915 (1). Recent applications have been extensively reviewed in this journal (2,3) and have included studies of the decomposition of polymers (4,5), flame retardancy (6), oil stability (7,8), and the volatility of compounds in addition to more classical studies of minerals and precipitates (2,3). A large portion of the use of TG has been in the routine screening of materials by industry, and much of this has been documented primarily in the technical applications literature.…”