Correlation study among oxygen permeability, molecular mobility, and amorphous structure change of poly(ethylene-vinylalcohol copolymers) by moisture

2009 ◽  
Vol 47 (12) ◽  
pp. 1181-1191 ◽  
Author(s):  
Tomoyuki Yamamoto ◽  
Taiji Kanda ◽  
Yuko Nishihara ◽  
Tetsuya Ooshima ◽  
Yoichiro Saito
Keyword(s):  
Molecular Mobility ◽  
Oxygen Permeability ◽  
Amorphous Structure ◽  
Correlation Study ◽  
Structure Change ◽  
Poly Ethylene

Copolymerization of Acrylic Monomers and Silane Group Containing Titanium Carbide Nanoparticles for Application to Ophthalmic Lens Materials

2021 ◽  
Vol 21 (8) ◽  
pp. 4388-4393
Author(s):  
Min-Jae Lee ◽  
A-Young Sung
Keyword(s):  
Ethylene Glycol ◽  
Titanium Carbide ◽  
Oxygen Permeability ◽  
Synergy Effect ◽  
Poly Ethylene Glycol ◽  
Propyl Methacrylate ◽  
Acrylic Monomers ◽  
Wetting Agents ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

This research was conducted to synthesis and application for high oxygen permeable ophthalmic lens materials. 2-(Trimethylsiloxy)ethyl methacrylate (2T), 3-[Tris(trimethylsiloxy)silyl]propyl methacrylate (3T), [(1,1-Dimethyl-2-propynyl)oxy]trimethylsilane (TMS), Poly(ethylene glycol) methyl ether methacrylate (PEGMA), N-vinyl-2-pyrrolidone (NVP) and titanium carbide nanoparticles were used as additives for the basic combination of synthesized silicone monomer (SiD) and N,N-Dimethylacetamide (DMA). And also, the materials were copolymerized with ethylene glycol dimethacrylate (EGDMA) as the cross-linking agent, azobisisobutyronitrile (AIBN) as the initiator. The copolymerization with a small amount of silane of about 1% increased the oxygen permeability to 30.3˜33.52(cm2/sec)·(mlO2/ml·mm Hg)·10−11, and in particular, the addition of titanium carbide nanoparticles was found to increase to 46.38 (cm2/sec)·(ml O2/ml·mm Hg)·10−11. Surface modification was possible with various wetting agents. Especially, simultaneous use with titanium carbide nanoparticles increased the wettability while maintaining water content. These materials are considered to make synergy effect each other, so it can be used in functional hydrogel ophthalmic lenses.

Molecular Mobility in Amorphous Biobased Poly(ethylene 2,5-furandicarboxylate) and Poly(ethylene 2,4-furandicarboxylate)

2018 ◽  
Vol 51 (5) ◽  
pp. 1937-1945 ◽  
Author(s):  
Aurélie Bourdet ◽  
Antonella Esposito ◽  
Shanmugam Thiyagarajan ◽  
Laurent Delbreilh ◽  
Frédéric Affouard ◽  
...  
Keyword(s):  
Molecular Mobility ◽  
Poly Ethylene

Oxygen permeability through poly(ethylene-co-vinyl acetate)/clay nanocomposites prepared by microwave irradiation

2011 ◽  
Vol 373 (1-2) ◽  
pp. 173-177 ◽  
Author(s):  
O. Urresti ◽  
A. González ◽  
M.J. Fernández-Berridi ◽  
J.J. Iruin ◽  
L. Irusta
Keyword(s):  
Microwave Irradiation ◽  
Vinyl Acetate ◽  
Oxygen Permeability ◽  
Clay Nanocomposites ◽  
Poly Ethylene

Research on Poly Lactic Acid Solvent Coated Paper

2012 ◽  
Vol 200 ◽  
pp. 380-384
Author(s):  
Jing Lei Tai ◽  
Guang Xue Chen ◽  
Qi Feng Chen ◽  
Bao Lin Tang
Keyword(s):  
Oxygen Permeability ◽  
Water Vapor Permeability ◽  
Poly Lactic Acid ◽  
Vapor Permeability ◽  
Poly Ethylene Glycol ◽  
Coated Paper ◽  
Roll Coating ◽  
Coating Method ◽  
Poly Ethylene ◽  
Poly Caprolactone

This paper draws on a roll coating method which used for the production of coated paper. Polylactide coating cardboard was prepared through the solvent coating, and study its packaging performance. In this study, chloroform is based solvent, ethanol or n-propanol as auxiliary solvents, poly (ethylene glycol) or poly caprolactone as plasticizer, and the water vapor permeability, oxygen permeability and heat sealability of polylactic acid coated cardboard.

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