Synthesis and characterization of alcogels based on ethylene glycol methyl ether methacrylate-vinyl phosphonic acid copolymers

Abstract

Alcohol absorbents based on poly(ethylene glycol methyl ether methacrylate) and vinyl phosphonic acid (VPA) were prepared via solution polymerization using poly(ethylene glycol dimethacrylate) macrocrosslinker. Swelling capacity of these materials was measured in water, ethanol and methanol. Alcohol absorbency was increased with increase of VPA content that can be attributed to ability of VPA in formation of Hbonding and disassociation of phosphonic acid group to produce mobile ions. The alcogels could absorb ethanol and methanol up to 15.1 and 17.8 g/g respectively. Thermo-gravimetric analysis showed that increase in VPA concentration increased char yield and decreased the initial decomposition temperature (IDT) due to forming anhydride crosslinks during heating. Based on rheological measurements, the storage modulus was increased with increase in PEGMEMA content. The prepared alcogels were further characterized using FTIR, NMR and DMTA.

Preparation of acrylate‐based double and triple interpenetrating polymer networks hydrogels: Rheological, thermal, and swelling behavior

“…However, the presence of a 3D crosslinked network structure and H‐bonding formation between components of TN hydrogels leads to a decrease in the chain mobility of the hydrogel macromolecules. Hence the second T g in TN hydrogels shifted to the significantly higher amount of 230°C 5,43 …”

“…As can be deduced from Figure 7, swelling capacity in the TN organogels is considerably higher than PAA and the DN organogel samples. The high swelling capacity of TN organogels is due to ionic interactions and hydrogen bonding attributed to the simultaneous presence of COOH and SO 3 H groups in TN organogel structure as well as the formation of three‐component interpenetrating network structure with higher crosslink density as suggested in the mechanism 5,8,32 …”

“…Polymeric gels, also called gelators or gelling agents, can swell in both aqueous and organic liquid and absorb these supported media several times their weight to form hydrogels and organic gels, respectively, due to their three‐dimensional network structure 1–5 . Hydrogels are widely used in versatile applications, including scaffolds for regenerative medicine and tissue engineering due to their hydrated nature and biocompatibility, cell culture, disposable diapers as urine absorbent, contact lenses, controlled drug delivery, wastewater treatment, drilling fluid additives, and viscosifying polymers 6–10 …”

“…Amides and thioamides—amide analogs containing sulfur—have been applied to organic synthesis in the presence of PAA to resolve this problem 23 . Also, carboxylic acid groups in PAA could create different intermolecular interactions like electrostatic interaction, hydrogen bonds, ion‐ion, and dipole‐ion with other polymers 5,22 . For example, grafting of comonomers such as AM and AMPS onto a low‐molecular‐weight PAA backbone can be a candidate for specific applications 10 .…”

“…Polymeric gels, also called gelators or gelling agents, can swell in both aqueous and organic liquid and absorb these supported media several times their weight to form hydrogels and organic gels, respectively, due to their three-dimensional network structure. [1][2][3][4][5] Hydrogels are widely used in versatile applications, including scaffolds for regenerative medicine and tissue engineering due to their hydrated nature and…”