Infrared spectra of lithium potassium copolyphosphates

Abstract

Infrared spectral analysis of lithium potassium copolyphosphates with various ratios of Li: K was carried out. The presence of an additional cation did not mask the characteristics of linear long-chain polyphosphates. While the Li: K ratio or the average molecular weight had little influence on the spectrum, the absorbances of all peaks were found to increase with increase in the proportion of potassium. Infrarotspektren yon Lithium-Kalium-CopolyphosphatenLithium-Kalium-Copolyphosphate mit unterschiedlichcm Li: K-Verhaltnis wurden infrarotspektroskopisch untersucht. Die Anwesenheit eines zweiten Kations andert die charakteristischen Eigenschaften der linearen langkettigen Polyphosphate nicht. Wahrend das Li: K-Verhaltnis und die mittlere Molekulmasse nur einen geringen EinfluW auf das Spektrum ausuben, nimmt die Intensitat allcr Banden mit zunehmendem Kaliumanteil zu.

Attaining a controlled graded distribution of particles in polymerizing fluid for functionally graded materials

“…The viscosity parameter was proposed18 for predicting the mud‐line displacement of a simulated fluid dispersion using Stokes law, with hindered settling model of Richardson and Zaki 19. Several models, including empirical, gelation, free‐volume analysis‐based, etc., have been proposed20, 21 to estimate the viscosity of the polymerizing fluid. Though these models provide a good approximate representation, the experimental data when plotted against time elapse showed a well‐defined exponential curve of the following type, for polymerizing fluids20: where μ 0 is the coefficient corresponding to the viscosity of fluid at time t = 0 and b is the rate of change of viscosity with time.…”