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Bell howell 12184/27/2023 ![]() ![]() Mechanical testing was used to evaluate the strength of P(MAA-g-EG) membranes and to elucidate the mesh size under various conditions. A Boltzmann superposition model was used to analyse this behaviour. Network collapse (complexation) occurred more rapidly than network expansion (decomplexation). Swelling under oscillatory pH conditions revealed the dynamic sensitivity of P(MAA-g-EG) membranes as well as the diffusional mechanisms causing network expansion and collapse. Mesh sizes in the two states were determined. ![]() Uncomplexed equilibrium swelling ratios were 40 to 90 times higher than those of the complexed states and varied according to copolymer composition and poly(ethylene glycol) (PEG) graft length. P(MAA-g-EG) membranes showed pH sensitivity due to complex formation and dissociation. Grafted poly(methacrylic acid-g-ethylene glycol) copolymers were synthesized and their pH sensitivity was investigated. ![]()
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