Synthetische lineare polymere XV.: Die abhängigkeit einiger spezifischer eigenschaften polymerhomologer oligomerverbindungen von der molekülgröße

Between the molecular weight of the members of polymerhomologous series and such specific properties which are derived from additive quantities the following relation exists: documentclass{article}pagestyle{empty}begin{document}$Phi _{{rm sp}} = frac{a} {m} + b$end{document} where Φ_sp is any specific property, i.e. documentclass{article}pagestyle{empty}begin{document}${rm z}.{rm B}.frac{{gamma ^{1/4} }}{d}$end{document} = specific parachor, documentclass{article}pagestyle{empty}begin{document}$- frac{{gamma ^{1/4} }} {d} {rm log (}n { - 1)}$end{document} = specific refrachor, documentclass{article}pagestyle{empty}begin{document}$frac{x} {d}$end{document} = specific magnetic susceptibility, documentclass{article}pagestyle{empty}begin{document}$frac{{2,9 {rm log} {rm log } eta { }}} {{rm d}}$end{document} = specific viscosity number, documentclass{article}pagestyle{empty}begin{document}$frac{{v^{1/3} }} {d}$end{document} = specific sound velocity, n = refractive index, documentclass{article}pagestyle{empty}begin{document}$frac{{n^2 + 1}} {{n^2 + 2}} cdot frac{1} {d}$end{document} = specific refraction, and M the molecular weight is a and b are constants the values of which can be used for the evaluation of the increments of the atoms of the base mole. Some of these specific properties are suitable for determination of molecular weights in the range of 10³?10⁵, i.e. in polymer plasticizer and synthetic fibers as polymides and polyesters.