نتایج جستجو برای: in situ atom transfer radical polymerization

تعداد نتایج: 17067231  

Journal: :Advances in Colloid and Interface Science 2021

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)...

Journal: :Chemical communications 2013
Qiang Zhang Zaidong Li Paul Wilson David M Haddleton

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.

Journal: :Macromolecular Rapid Communications 2022

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...

2013
Akhilesh Kumar Shakya Ashok Kumar

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...

Journal: :علوم و تکنولوژی پلیمر 0
سمیه محمدیان گزاز اسماعیل قاسمی عبدالرسول ارومیه ای

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...

Journal: :Npg Asia Materials 2022

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...

2017
Jian Wu Lifen Zhang Zhenping Cheng Xiulin Zhu

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...

2018
Youning Chen Wei Zhao Huan Wang Yuhong Li Chenxi Li

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...

Journal: :Biomacromolecules 2021

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...

Journal: :Journal of Physical Chemistry B 2021

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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