نتایج جستجو برای: graft polymerization

تعداد نتایج: 113644  

Journal: :Journal of Applied Polymer Science 2023

Abstract This study endeavors to augment the antibacterial and anti‐biofouling properties of thin‐film composite polyamide membranes by subjecting them modification with chitosan silver nanoparticle materials through UV‐induced graft polymerization technique. Various surface assessment methods were employed, efficiency membrane performance was demonstrated flux retention filtration process, whi...

2008
Patrick Farquet Celestino Padeste Harun H. Solak Selmiye Alkan Gürsel Günther G. Scherer Alexander Wokaun

Periodic nanostructures of poly(glycidyl methacrylate) (pGMA) were grafted onto poly(ethylenealt-tetrafluorethylene) (ETFE) films by reversible addition-fragmentation chain transfer (RAFT) polymerization. ETFE samples were first irradiated in an interference lithographic setup using EUV (extreme ultraviolet) light followed by exposure to air to introduce surface peroxide groups serving as therm...

Journal: :Colloids and Surfaces B: Biointerfaces 2021

Mechanical property is an important factor of cellular microenvironment for neural tissue regeneration. In this study, polyacrylamide (PAM) hydrogels with systematically varying elastic modulus were prepared using in situ radical polymerization. We found that the hydrogel was biocompatible, and length dorsal root ganglion (DRG)'s axon cell density optimal on 5.1 kPa (among between 3.6 16.5 kPa)...

Journal: :Journal of Membrane Science 2021

Hydraulic permeability and molecular weight cutoff (MWCO) performance tuning of polysulfone (PSf) ultrafiltration (UF) membrane was attained via surface modification with a tethered layer poly(acrylic acid) (PAA). Surface nano-structured (SNS) PAA synthesized onto base PSf UF membranes by atmospheric pressure plasma (APP) activation followed graft polymerization (GP) acrylic acid (AA). Through ...

2010
Yusuf Yagci Steffen Jockusch Nicholas J. Turro

The use of photoinitiated polymerization is continuously growing in industry as reflected by the large number of applications in not only conventional areas such as coatings, inks, and adhesives but also high-tech domains, optoelectronics, laser imaging, stereolithography, and nanotechnology. In this Perspective, the latest developments in photoinitiating systems for free radical and cationic p...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2007
Andréas Larsson Bo Liedberg

A novel method of producing a poly(ethylene glycol) (PEG)-based gradient matrix that varies gradually in thickness from 0 to 500 A over a distance of 5-20 mm is presented. The gradient matrix is graft copolymerized from a mixture of PEG methacrylates onto organic thin films providing free radical polymerization sites initiated by UV irradiation at 254 nm. The films used as grafting platforms co...

Journal: :Chemical reviews 2007
Nahrain E Kamber Wonhee Jeong Robert M Waymouth Russell C Pratt Bas G G Lohmeijer James L Hedrick

Modern synthetic methods have revolutionized polymer chemistry through the development of new and powerful strategies for the controlled synthesis of complex polymer architectures.1-5 Many of these developments were spawned by new classes of transition metal catalysts for the synthesis of new polyolefin microstructures,5 the design of highly efficient families of “living” polymerization strateg...

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