نتایج جستجو برای: free radical polymerization

تعداد نتایج: 610931  

Journal: :علوم و تکنولوژی پلیمر 0
محمدرضا رستمی درونکلا محمدعلی سمسارزاده

in atom transfer radical polymerization (atrp) of methyl acrylate (ma) with polyvinyl acetate macroinitiator in bulk at 90°c the plots of ln [m]0/[m] increased linearly with reaction time. the apparent propagation rate constant (kp app) of the reaction was obtained from the linear curve and used to calculate the free macroradical concentration ([r°]) in polymerization medium. the [r°] and also ...

Journal: :Macromolecular Chemistry and Physics 2021

Terpolymers are used to generate bio-decomposable self-assemblies. PEG-PVL-PGMA terpolymers synthesized via a combination of organocatalyzed living radical polymerization (RCMP) with polymerization-induced self-assembly (PISA), generating vesicle, multicompartment micelle (MCM), and core-compartmentalized worm (CCW), where PEG, PVL, PGMA poly(ethylene glycol) monomethyl ether, poly(?-valerolact...

2004
Ludmila Kolb Ralf Thomann Stefan Mecking

Emulsion polymerization is one of the most important and versatile polymerization processes. About 10 million tonnes of polymer latices are produced annually for a variety of applications, such as coatings and paints. A key step in most applications is film formation upon evaporation of the dispersing medium, rendering aqueous dispersions particularly environmentally benign. Polymer dispersions...

2015
Yifan Pang Ruixue Wei Jintao Wang Liuhe Wei Chunhui Li

In this study, we discover unexpectedly that simple reaction of AgNO3 with oleic acid (OA) without solvent and surfactant could generate alkyl free radical which can catalyze double-bond polymerization of OA to form 1D polymeric oleic acid (POA) chain. In certain conditions, these POA chains circumvolute tightly each other to form microspheres and micro-plates in which monodisperse 4-5 nm Ag na...

Journal: :the iranian journal of pharmaceutical research 0
n. vishal gupta department of pharmaceutics, jss college of pharmacy, jss university, sri shivarathreeshwara nagar, mysore-570 015, karnataka, india. h.g. shivakumar department of pharmaceutics, jss college of pharmacy, jss university, sri shivarathreeshwara nagar, mysore-570 015, karnataka, india.

the objective of the present study is to develop and investigate the swelling behavior of ph-sensitive superporous hydrogel (sph) and sph composite (sphc). a novel superporous hydrogel containing poly (methacrylic acid-co-acrylamide) was synthesized from methacrylic acid and acrylamide through the aqueous solution polymerization, using n,n-methylenebisacrylamide as a crosslinker and ammonium pe...

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