نتایج جستجو برای: precipitation polymerization

تعداد نتایج: 89204  

2017
Kun Zhang Kai Yang Shiyun Ai Jing Xu

A blue-fluorescence 2,4,6-tris(4-fluorophenyl)-1,3,5-triazine (TFPT) monomer was synthesized with high yield and high purity under mild reaction conditions. The TFPT, which had three active fluoric groups, was facilely incorporated into stable cross-linked fluorescent polymeric nanoparticles (FCPNs) via precipitation polymerization with 6-(4-hydroxyphenyl)pyridazin-3(2H)-one (HPZ). The FCPNs we...

2011
Petra BUSINOVA Jana CHOMOUCKA Jan PRASEK Radim HRDY Jana DRBOHLAVOVA Petr SEDLACEK Jaromir HUBALEK

This contribution presents the production of polymer-coated iron oxide magnetic nanoparticles carrying functional groups on their surface and their basic characterization. The preparation of polymer-coated nanoparticles was carried out by a two-step process. In the first step, magnetite (Fe3O4) nanoparticles were prepared by a co-precipitation method from the solutions of FeCl2.4H2O and FeCl3.6...

Journal: :The Journal of General Physiology 1950
N. B. Kurnick A. E. Mirsky

Study of the stoichiometry of the DNA-methyl green reaction by dialysis, precipitation of stain-nucleic acid mixtures, and the staining of nuclei of known DNA content, indicate that the compound consists of one dye molecule per 10 P. The significance of this result was discussed in the preceding paper (1). Histone and lanthanum (and probably other multivalent cations (3)) compete with the dye f...

2017
Qiang Xia Yanbin Yun Qiang Li Zejun Huang Zhixia Liang

A new kind of molecularly imprinted polymer (MIP) microspheres for the selective extraction of kaempferol was prepared by precipitation polymerization using 4-vinylpridine (4-VP) and ethylene glycol dimethacrylate (EDMA) as functional monomer and cross-linker respectively. The synthesis conditions, such as ratios of 4-VP/EDMA and polymerization time were discussed in detail. Results showed that...

2006
Mirja Andersson Sami Hietala Heikki Tenhu Sirkka Liisa Maunu

Thermoresponsive colloidal particles were prepared by seeded precipitation polymerization of N-isopropylacrylamide (NIPAM) in the presence of a crosslinking monomer, N,N-methylenebisacrylamide (MBA), using polystyrene latex particles (ca. 50 nm in diameter) as seeds in aqueous dispersion. Phase transitions of the prepared poly(N-isopropylacrylamide), PNIPAM, shells on polystyrene cores were stu...

Journal: :Molecules 2009
Roberta Del Sole Maria Rosaria Lazzoi Mario Arnone Fabio Della Sala Donato Cannoletta Giuseppe Vasapollo

Molecularly imprinted microspheres obtained by precipitation polymerization using nicotinamide (nia) as template have been prepared and characterised by SEM. How various experimental parameters can affect microsphere morphology, reaction yield and re-binding capacity have been evaluated. Pre-polymerization interactions between template and functional monomer in chloroform and MeCN have been stu...

2002
Daphne N. Robinson Nicholas A. Peppas

Poly(methacrylic acid-g-ethylene glycol) (P(MAA-g-EG)) has been studied extensively in our laboratory due to its extremely promising applications in the biomedical and pharmaceutical fields. It exhibits pH-responsive interpolymer complexes that make it a promising candidate as an oral carrier for peptide and protein drug. We have developed a photoinitiated free-radical precipitation polymerizat...

Journal: :Macromolecular Chemistry and Physics 2021

Front Cover: In article number 2100022 by Tugrul Cem Bicak, a new method, namely “Type-II photoinitiated precipitation polymerisation”, is described for the synthesis and functionalisation of highly crosslinked microspheres in one step. Using this click functionality introduced to particles at room temperature UV irradiation. A pyrene group then attached onto CuAAC reaction confirm presence acc...

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