DSC and TGA characterization of free and surface water of colloidal unimolecular polymer (CUP) particles for coatings applications

Geng, Peng; Gade, Sagar Vijay; Mark, Michael R. Van De

doi:10.1007/s11998-020-00388-3

Cited by 1 publication

(2 citation statements)

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“…The interaction radius (R 0 ) (Figure 13) is the extent of the solubility sphere encompassing the good solvents and excluding the bad ones. The Hansen parameters for a copolymer, shown in Table 6, were calculated based on the weight fraction (w 1 and w 2 ) of each monomer present in the copolymer chain and individual homopolymer Hansen parameters [33,34] using Equation (10). The interaction radius (R 0 ) of the copolymer was also calculated as the weight average of individual homopolymers.…”

Section: Comparision Using Hansen Solubility Parametersmentioning

confidence: 99%

“…CUPs have a lot of utility in the field of coatings due to their zero-VOC (volatile organic content), low cost and easy synthesis. They have been used as a resin that can be cured with melamine or aziridine [8,9], an additive for the freeze-thaw stability and wet-edge retention [10] of latex paints or as a catalyst [11]. They can also be potential drug-delivery systems.…”

Section: Introductionmentioning

confidence: 99%

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Defining the Collapse Point in Colloidal Unimolecular Polymer (CUP) Formation

et al. 2022

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Colloidal unimolecular polymer (CUP) particles were made using polymers with different ratios of hydrophobic and hydrophilic monomers via a self-organization process known as water reduction. The water-reduction process and the collapse of the polymer chain to form a CUP were tracked using viscosity measurements as a function of composition. A vibration viscometer, which allowed for viscosity measurement as the water was being added during the water-reduction process, was utilized. The protocol was optimized and tested for factors such as temperature control, loss of material, measurement stability while stirring, and changes in the solution volume with the addition of water. The resulting viscosity curve provided the composition of Tetrahydrofuran (THF)/water mixture that triggers the collapse of a polymer chain into a particle. Hansen as well as dielectric parameters were related to the polymer composition and percentage v/v of THF/water mixture at the collapse point. It was observed that the collapse of the polymer chain occurred when the water/THF composition was at a water volume of between 53.8 to 59.3% in the solvent mixture.

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Section: Comparision Using Hansen Solubility Parametersmentioning

confidence: 99%