Evaluation of CO₂‐philicity and thickening capability of multichain poly(ether‐carbonate) with assistance of molecular simulations

Abstract

Phenyl-centered tri-chain poly(ether-carbonate) (TMA-PEC), phenyl-centered double-chain poly(ether-carbonate) (TPA-PEC), and phenyl-centered fourchain poly(ether-carbonate) (TFA-PEC) were synthesized to act as CO 2 thickener. Their solubility in CO 2 was measured by cloud point pressure. In order

Effective viscosification of supercritical carbon dioxide by oligomers of 1-decene

“…(2018) Variable volume cell, windows made of quartz glass 308 15–30 Magnetic stirrer Falling ball Al-Hinai et al. (2018) Windowed cell 377 55 No stirrer Capillary Chen et al. (2020) Autoclave with adjustable volume (visibility) 308 5–40 Not mentioned Falling ball …”

“…(2020) . Chen et al. (2020) report on CO 2 thickening by poly ether carbonates and find CO 2 viscosity to increase by a factor of 11 and 3.9 by addition of 0.95 wt% of phenyl-centered four-chain poly (ether-carbonate) and 0.72 wt% phenyl-centered tri-chain poly (ether-carbonate), respectively, at P = 30 MPa and T = 308 K. Ether group has one oxygen atom directly connected to an alkyl group.…”

Modeling of Branched Thickening Polymers under Poiseuille Flow Gives Clues as to How to Increase a Solvent’s Viscosity

“…For this purpose, we model prototype starlike polymers with four arms (BR4), where the central structure is made up of six beads labelled as B. Structures similar to this can be found in the literature [51,52]. The four arms are made up of beads called R; see Fig.…”

“…Structures similar to this can be found in the literature. 51,52 The four arms are made up of beads called R; see Figure 1a. The mesoscopic DPD representation of the system simulated is shown in Figure 1b, while Table 1 shows the a ij interaction parameters (see eq 2).…”

“…This is in contrast to the density profiles shown in the same figure for k = 40, 50 and 100, all of which have a maximum in the center of the pore. Softer bonding interactions allow the branches to stretch and intermingle with branches from other copolymers, creating agglomerates that yield larger viscosity[52].Exploring the dependence of the viscosity with the spring constant, universal kindependent behavior is obtained when the 0 data from Fig.13are plotted as a function of ϕ = ln( ) ⁄ , see Fig. 13.…”