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Sequential interpenetrating polymer networks (SIPNs) composed of poly(2-hydroxyethyl methacrylate) (PHEMA) and polystyrene (PS) were synthesized by photopolymerization at room temperature. A common solvent, N,N-dimethylformamide, was used to impregnate the styrene monomer into the PHEMA network. The IPNs had a microphase-separated structure of the order of 100 nm. It was found that the gradient composition in the surface region (to a depth of 0.1 mm) was obtained by polymerization inhibition with oxygen which had diffused from the surfaces of the swollen PHEMA gel. X-ray photoelectron spectroscopy measurements revealed that the PS component was enriched in the surface of the IPN. Thermodynamic effects on the composition of the outermost surface layer are discussed

Посилання на статтю:

Hydrophobic and hydrophilic interpenetrating polymer networks (IPNs) composed of polystyrene and poly(2-hydroxyethyl methacrylate): 2. Gradient composition in the IPNs synthesized by photopolymerization / Satoshi Murayama, Shin-ichi Kuroda and Zenjiro Osawa // Polymer. – 1993. – Vol 34. – P. 3893-3898.

Hydrophobic and hydrophilic interpenetrating polymer networks (IPNs) composed of polystyrene and poly(2-hydroxyethyl methacrylate): 2. Gradient composition in the IPNs synthesized by photopolymerization - Завантажити.