Juniper Publishers Journal of Polymer science

                                        JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Novel phenyl-disubstituted propyl 3-(R-phenyl)-2-cyanoacrylates, RPhCH=C(CN)CO 2 C 3 H 7 (where R is 2-fluoro-5-methyl, 3-iodo-4-methoxy, 5-iodo-2-methoxy, 3,5-dichloro, 3,4-difluoro, 3,5-difluoro, 2-chloro-4-fluoro, 2-chloro-6-fluoro, 3-chloro-2-fluoro, and 3-chloro-4-fluoro) were prepared using condensation of substituted benzoic aldehydes and propyl ester of cyanoacetic acid. The ethynyl benzene copolymerization of novel cyanoacrylates was conducted in solution with radical initiation at 70 C. Nitrogen analysis, 1 H & 13 C NMR was used to analyze composition and the structure. Thermal behavior of the copolymers was analyzed by DSC and TGA. Keywords: Radical copolymerization; Styrene copolymers; Trisubstituted ethylene’s; Cyanoacrylates ...

                                   JUNIPER PUBLISHERS-   ACADEMIC JOURNAL OF POLYMER SCIENCE Abstract Glutathione may prevent age-related, oxidative damage to ocular tissues but has poor corneal penetration. Hydrogel formulations were investigated to determine an optimized ocular delivery system. The rheology and texture profile of formulations were investigated at 25°C. The 1% w/v glutathione was incorporated into systems demonstrating desirable characteristics for ocular vehicles and physical characteristics re-determined. In vitro cumulative glutathione delivery across the bovine cornea was measured over 8 hours at 32ºC in Franz diffusion cells. Carbopol-containing Poloxamer systems exhibited shear-thinning behavior desirable for ocular formulations whilst Polyvinyl alcohol (PVA) and Polyacrylic acid (PAA) systems exhibited Newtonian behavior. Of the glutathione-containing ...

Authored by Marek Gryta                                                                            Abstract Microporous hydrophobic membranes are applied in membrane distillation. During a long-term of module exploitation, a part of the pores is filled by water, and the membrane wetting causes that the industrial implementation of this process is hindered. Several investigators achieved promising results using the polypropylene membranes formed via TIPS method for various applications of membrane distillation. Keywords: Membrane distillation; Polypropylene membrane; Hydrophobic membrane Abbrevations: MD: Membrane Di...

Authored by Marek Gryta Abstract Microporous hydrophobic membranes are applied in membrane distillation. During a long-term of module exploitation, a part of the pores is filled by water, and the membrane wetting causes that the industrial implementation of this process is hindered. Several investigators achieved promising results using the polypropylene membranes formed via TIPS method for various applications of membrane distillation. Keywords: Membrane distillation; Polypropylene membrane; Hydrophobic membrane Abbrevations: MD: Membrane Distillation; PTFE: Polytetrafluoroethylene; PP: Polypropylene PE: Polyethylene; TIPS: Thermally Induced Phase Separation Introduction Membrane distillation (MD) is an evaporation process of water through non-wetted porous membranes. In this process the salts and other non-volatile compounds present in the feed water are retained and the quality of produced distillate is close to distilled w...