نتایج جستجو برای: in situ atom transfer radical polymerization
تعداد نتایج: 17067231 فیلتر نتایج به سال:
Micelles from self-assembled amphiphilic copolymers are highly attractive in drug delivery, due to their small size and hydrophilic stealth corona allowing prolonged lifetimes the bloodstream thus improved bioavailability. Polylactide (PLA)-based copolymer micelles key candidates this field, owing well-established biodegradability biocompatibility of PLA. While PLA-b-poly(ethylene glycol) (PEG)...
The polymerization of hydrophilic monomers is reported utilizing Cu(0)-mediated living radical polymerization, SET-LRP. Highly active Cu(0) is formed in situ as a result of rapid disproportionation of [Cu(I)(Me6-Tren)Br] in serum. Disproportionation and homogenous controlled radical polymerization (PDI 1.09-1.25) are performed for the first time in blood (sheep) serum.
Front Cover: A block copolymer containing UV-addressable benzophenone moieties within the hydrophobic is synthesized via atom transfer radical polymerization (ATRP). The utilized in a self-assembly non-solvent induced phase separation process to obtain an integral asymmetric membrane, which can be stabilized upon UV- irradiation revealing enhanced solvent and pressure resistance. This work feat...
Article info: Received: 23 January 2013 Accepted: 5 February 2013 ABSTRACT One of the major challenges in modern synthetic polymer chemistry is to synthesize end defined polymers of different end functionality with predetermined uniform molecular weight. End functionalized polymers/copolymers basically in block and grafting form are having several potential applications in biomedical areas in t...
a new method was used to prepare abs/pa6 blends by in situ polymerization and compatibilization method. in this process, ε-caprolactam monomer was polymerized in presence of abs via activated anionic polymerization to produce pa6. the main ingredients of the reaction mixture included: monomer ()ε-caprolactam), catalyst na-caprolactamate), microactivator hdi)( and macro-activator sma)(. then, in...
Abstract In this study, we show the controlled self-oscillation behavior (i.e., normalized amplitude, swelling rate, and deswelling rate) of self-oscillating gels by introducing grafted chains. The chain was introduced to base gel network “grafting from” method atom-transfer radical polymerization (ATRP). We demonstrated that properties chain, including monomer composition length can lead notab...
Photochemistry serves as a wonderful means to facilitate various chemical reactions and is indeed unique in its powerful ability to meet the energetic requirements for conducting processes that would not be accomplished using thermal counterparts. In this work, a novel photocatalyzed Fe-based atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) was performed under UV irradia...
This paper explored the method of combining atom transfer radical polymerization (ATRP) technology and hyperbranched polymer principle to prepare the high capacity chelating resin. First, surface-initiated atom transfer radical polymerization (SI-ATRP) method was used to graft glycidyl methacrylate (GMA) on chloromethylated cross-linked styrene-divinylbenzene resin, and then the novel polyamine...
When cellulose nanocrystals (CNCs) are isolated from microfibrils, the parallel arrangement of chains in crystalline domains is retained so that all reducing end-groups (REGs) point to one crystallite end. This permits selective chemical modification end CNCs. In this study, two reaction pathways compared selectively attach atom-transfer radical polymerization (ATRP) initiators REGs CNCs, using...
Organic photocatalysts (PCs) are gaining popularity in applications of photoredox catalysis, but few studies have explored their modus operandi. We report a detailed mechanistic investigation the electron transfer activation step organocatalyzed atom radical polymerization (O-ATRP) involving electronically excited organic PCs and initiator, methyl 2-bromopropionate (MBP). This study compares ni...
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