When comparing with our viscosity data for dilute solutions of compounds 3 and 5 at different temperatures and in different solvents (see Figure ), only the Tian-Munk interaction parameter 𝜒 𝑇𝑀 (see Table ) allows to put all measured overlap concentrations of a given polymer in the correct order. Moreover, 𝜒 𝑇𝑀 shows the best agreement with the published experimental data when assuming better solubility at elevated temperatures, as indicated by the viscosity data. Therefore, we use 𝜒 𝑇𝑀 as starting point to develop below an improved estimate 𝜒 𝜂 that reproduces accurately the ratio of the measured intrinsic viscosities of both compounds, allowing for a quantitative comparison of data measured in different solvents.