Preferential absorption of (binary) solvents by p-hydroxyethyl methacrylate gels
نویسندگان
چکیده
منابع مشابه
Swelling behavior of poly (2-hydroxyethyl methacrylate) copolymer gels
Hydrogels based on 2-hydroxyethyl methacrylate/dimethyl-aminoethyl methacrylate copolymers were prepared by gamma radiation-inducedco-polymerization at low temperature (−78◦C). The swelling behavior of hydrogels was studied by immersion of the polymer discs in buffered solutions at pH from 2 to 10. The hydration process was followed gravimetrically by measuring the water uptake of the discs as ...
متن کاملThe effect of polar copolymers in protein absorption on contact lenses on 2-Hydroxyethyl methacrylate(HEMA)
For the purpose of increasing the permeability to oxygen and equilibrium water content in contact lenses, polar copolymers with nonionic monomers such as 2-hydroxyethle methacrylate(HEMA) Is used. By adding the polar monomers to (HEMA), the permeability to oxygen and equilibrium with water content is increased and also the absorption of proteins on lens surface is changed. In this research, the...
متن کاملEvaluation of poly(2-hydroxyethyl methacrylate) gels as drug delivery systems at different pH values.
Studies of dynamic and equilibrium swelling, structural characterisation and solute transport in swollen poly(2-hydroxyethyl methacrylate) gels (pHEMA) cross-linked with tripropyleneglycol diacrylate (TPGDA) were done for a wide range of TPGDA concentrations. The influence of the pH on these pHEMA properties was evaluated. In swelling studies it was found that in changing the pH from 6.5 to 12....
متن کاملThermodynamics and hydrodynamics of chemical gels II. Gels in binary solvents
We have developed a framework of the thermodynamics and hydrodynamics of chemically crosslinked gels in a binary miscible solvent. This work is an extension of a previous one on gels in a single solvent [Sekimoto K., J. Phys. II France1 (1991) 19]. Introduction of a composition degree of freedom of the solvent leads to both thermodynamic chemo-mechanical coupling and kinematical cros~coupling b...
متن کاملthe effect of polar copolymers in protein absorption on contact lenses on 2-hydroxyethyl methacrylate(hema)
for the purpose of increasing the permeability to oxygen and equilibrium water content in contact lenses, polar copolymers with nonionic monomers such as 2-hydroxyethle methacrylate(hema) is used. by adding the polar monomers to (hema), the permeability to oxygen and equilibrium with water content is increased and also the absorption of proteins on lens surface is changed. in this research, the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Polymer Science
سال: 1978
ISSN: 0021-8995,1097-4628
DOI: 10.1002/app.1978.070220325