Results 151 to 160 of about 1,564 (190)

Modification of adhesive properties of a polyethylene film by photografting

Journal of Applied Polymer Science, 2004
AbstractGraft polymerization of acrylic acid from monomer solutions in water or in bulk onto low‐density polyethylene film substrate was carried out by the method of continuous process under UV radiation. Effects of the nature of photoinitiator on acrylic acid grafting was first studied. One PI2 and two PI1 photoinitiators were used.
El Kholdi, O., Lecamp, L., Lebaudy, P., Bunel, C., Alexandre, S.   +4 more
openaire   +3 more sources

Sensitized Photografting of Diazonium Salts by Visible Light.

Chemistry of Materials, 2012
Visible irradiation of a gold surface dipped into a solution of diversely substituted aryldiazonium salts in the presence of a photosensitizer (Ru(bipy)32+ or eosinY) leads to a modification of the surface by attached aryl groups. A grafted nanometer thick polyphenylene film is obtained.
Bouriga, Meriem, Chehimi, Mohamed M., Combellas, Catherine, Decorse, Philippe, Kanoufi, Frédéric, Deronzier, Alain, Pinson, Jean   +6 more
openaire   +2 more sources

Surface modification and lamination of polymers by photografting

International Journal of Adhesion and Adhesives, 1999
This paper describes experimental processes for UV initiated “surface photografting” of polymers: the batch process with vapor-phase transfer of initiator and monomer and the continuous process with liquid-phase transfer of initiator and monomer in a thin layer of solution on the surface of the substrate.
openaire   +1 more source

Thermally Regenerable Ion-Exchange Resins by Photografting

Journal of Macromolecular Science: Part A - Chemistry, 1977
Abstract Crosslinked polymer beads containing regions of acidic and basic groups are the preferred structures for the efficient operation of a thermally regenerable ion-exchange process. Such systems can be prepared by various methods. Here the approach of using polymers and copolymers containing photo-labile groups as grafting sites is described.
M. B. Jackson, W. H. F. Sasse
openaire   +1 more source

Characterization of PNIPAAm photografted on PET and PS surfaces

Applied Surface Science, 2005
Abstract Aqueous solution of poly(N-isopropylacrylamide), or PNIPAAm, possess lower critical solution temperature (LCST) around 32–33 °C. Below this temperature the PNIPAAm is hydrophilic and above presents hydrophobic characteristics. In this work, virgin or oxidized films of PET and PS were submitted to surface modification by grafting of PNIPAAm ...
Priscila S. Curti, Márcia R. de Moura, Wanderley Veiga, Eduardo Radovanovic, Adley F. Rubira, Edvani C. Muniz   +5 more
openaire   +1 more source

Comparative examination of sensitizers in photografting on polymer films

Polymer Photochemistry, 1986
Abstract Photografting (λ > 300 nm) of methacrylic acid on low-density polyethylene film (thickness 30 μm) was carried out at 60°C for 60 min in water medium, and the activity of sensitizers towards the grafting was examined. Various sensitizers, involving hydrogen atom abstraction (aromatic ketones and quinones), radical generation, and energy ...
Hitoshi Kubota, Kyoko Kobayashi, Yoshitaka Ogiwara   +2 more
openaire   +1 more source

Substrate-Independent Photografting of Hyaluronic Acid for Antifouling Coatings

Langmuir
This work introduces a substrate-independent method for covalently immobilizing pristine hyaluronic acid (HA) as an antifouling coating on various surfaces. A tyrosine-conjugated perfluorophenyl azide (Tyr-PFPA) was synthesized, containing a tyrosine moiety that undergoes tyrosinase-mediated oxidation to form a melanin-mimetic film on various ...
Daeun Chu, Yubin Hong, Suho Park, Jaehoon Jeong, Daewha Hong   +4 more
openaire   +2 more sources

SURFACE PHOTOGRAFTING POLYMERIZATION OF STYRENE ON LDPE FILM

Journal of Macromolecular Science, Part A, 2002
ABSTRACT Styrene (St) was photografted onto LDPE substrates with different methods including a one-step method, pre-irradiation method, and pre-grafting method. Percent conversion (CP) and grafting efficiency (GE) of LDPE/St polymerization systems were measured by the gravimetric method.
Deng Jianping, Yang Wantai, Bengt Rånby
openaire   +1 more source

Functionalizing of polyurethane surfaces by photografting with hydrophilic monomers

Journal of Applied Polymer Science, 2000
Poly(ester urethane) (PU) with functional groups (amide, hydroxyl, carboxyl) on surfaces were prepared by grafting monomers such as acrylamide (AAm), hydroxyethyl acrylate (HEA), and methacrylic acid (MAA) onto the PU membranes. Grafting copolymerization was carried out by the combined use of photooxidization and UV irradiation grafting.
Jianjun Guan, Changyou Gao, Linxiang Feng, Jiacong Shen   +3 more
openaire   +1 more source

Autohesive properties of polyolefins photografted with hydrophilic monomers

Journal of Applied Polymer Science, 2003
AbstractIn an attempt to provide polyolefins such as low‐ and high‐density polyethylene and polypropylene with autohesive properties, hydrophilic monomers such as methacrylic acid (MAA), acrylic acid (AA), and 2‐(dimethylamino)ethyl methacrylate (DMAEMA) were photografted onto their surfaces.
Kazunori Yamada, Jun Kimura, Mitsuo Hirata   +2 more
openaire   +1 more source