نتایج جستجو برای: grafted copolymer

تعداد نتایج: 22029  

2012
Jianing Gao Junting Li Brian C. Benicewicz Linda S. Schadler

This study demonstrated a method for toughening a highly crosslinked anhydride cured DGEBA epoxy using rubbery block copolymer grafted SiO2 nanoparticles. The particles were synthesized by a sequential reversible addition-fragmentation chain transfer (RAFT) polymerization. The inner rubbery block poly(n-hexyl methacrylate) (PHMA) had a glass transition temperature below room temperature. The ou...

2015
Amandine Noel Yannick P. Borguet Karen L. Wooley

A series of hydrolytically degradable fluorescent poly(ferulic acid-co-tyrosine)-g-mPEG graft copolymers were synthesized and shown to undergo self-assembly in aqueous media to yield fluorescent micelles. The polymers and their micellar assemblies exhibited greater fluorescence emission intensity than did their small molecular building blocks, which provides a self-reporting character that has ...

2006
Chang Xu Tao Wu James D. Batteas Charles Michael Drain Kathryn L. Beers Michael J. Fasolka

We outline a method to fabricate gradient combinatorial libraries that explore architectural parameters of surface-grafted block copolymers (BCs). In addition, we demonstrate the utility of such libraries for the rapid, thorough assessment of the response of grafted BCs to solvent exposure. Our fabrication route uses surface-initiated controlled radical polymerization to produce a tethered poly...

2004
Wen Hong Ruan Ming Qiu Zhang Min Zhi Rong Klaus Friedrich

Polymer based nanocomposites, in which inorganic nanoparticles are dispersed in organic polymer matrices, have attracted materials scientists’ attention owing to their unique properties, resulting from their nano-scale microstructure. Because of their large surface area, nanoparticles interact with the polymer matrix and carry a load effectively. The mechanical properties of these composites ca...

Journal: :Arabian journal for science and engineering 2022

Abstract The present study aimed to develop an efficient superabsorbent hydrogel for water conservation and slow release of Ethephon in sandy soil. Herein, carboxymethyl cellulose (CMC) was grafted via a free radical polymerization technique with acrylamide 2-Acrylamido-2-methylpropanesulfonic acid (AMPS) as hydrophilic monomers. developed CMC-g-(PAM-co-PAMPS) graft copolymer characterized by F...

Journal: :Chemical communications 2012
Zhi-Qiang Yu Jiao-Tong Sun Cai-Yuan Pan Chun-Yan Hong

A facile temperature induced self-assembly and self-crosslinking method has been developed for preparing bioreducible nanogels/microgels without need of any stabilizer, catalyst or additional crosslinking agent. The size of formed nanogels/microgels can be easily tuned via the polymer concentration.

Journal: :European journal of advanced chemistry research 2022

Corrosion prevention has been one of the major concerns these days various methods have adopted for corrosion prevention. However, use inhibitors proven to be easiest and cheapest method But then most conventional are expensive toxic. Therefore recent focus turned developing non-toxic cheap inhibitors. To achieve that a Polyacrylic acid was successfully grafted on chitosan by thermal using refl...

Seedlings of aubergine (Solanum melongena L.) cv. ‘Rima’ were used as scion (R) and control (non-grafted) and rootstock (self-grafted) (RR), while two hybrid tomatoes ‘Heman’ (Lycopersicon hirsutm) and ‘Primavera’ (Lycopersicon esculentum) were used as rootstocks. Grafted and non-grafted plants were grown in the greenhouse and in the open-field. Grafted plants Rima and Heman (RH) were more vigo...

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