Miscibility Studies of Hydroxypropyl Cellulose/Poly(Ethylene Glycol) in Dilute Solutions and Solid State

Abstract

The miscibility of Hydroxypropyl cellulose (HPC)/poly(ethylene glycol) (PEG) blends over an extended range of concentrations in water. The viscosity, ultrasonic velocity, and refractive index of the above blend solutions have been measured at 30• C. The interaction parameters such as Δβ and μ proposed by Chee and α proposed by Sun have been obtained using the viscosity data to probe the miscibility of the polymer blends. The values indicated that the blends were miscible when HPC content is more than 40% in the blend. The obtained results have been confirmed by the ultrasonic velocity and refractive index studies. The films of the blends were prepared by solution casting method using water as a solvent. The prepared films have been characterized by analytical techniques such as FTIR, DSC, X-RD, and SEM to probe the miscibility of HPC/PEG blends. The compatibility in the above compositions may be due to the formation of H-bonding between hydroxyl groups of HPC and etheric oxygen atom of PEG molecules.

Dispersion of Micro Fibrillated Cellulose (MFC) in Poly(lactic acid) (PLA) from Lab-Scale to Semi-Industrial Processing Using Biobased Plasticizers as Dispersing Aids

“…Additionally, the micrographs showed some different characteristic diameter tangles of cellulose fibrils, probably related to their mutual macromolecular self-organising during the biosynthesis process, of which the modification and destruction would cause defibrillation, forming looser structures [57]. Interesting is the random and well-dispersed presence of shiny dots within the plasticized matrix [58], corresponding to the transverse fractured sections of cellulose fibril and, as evidenced previously, its enhanced defibrillation [59]. From the SEM micrographs, it is possible to conclude that the plasticisers adopted allow a good MFCs dispersion within the polymeric matrix without leading to the formation of significant agglomerates that could result in detrimental mechanical properties.…”

3D printing of responsive chiral photonic nanostructures

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Investigation of Polyvinyl Chloride and Thermoplastic Polyurethane Waste Blend Miscibility

“…Basically, the dilute-solution viscometry is based on the well-known classical Huggins' equation that expresses the specific viscosity η sp of the polymer as a function of the concentration c, when one of the components is alone in the solution [5,18]:…”