SYNTHESIS OF HYPERBRANCHED POLYMERS VIA POLYMERIZATION OF ASYMMETRIC MONOMER PAIRS

Physics in Radiology, D-69120 Heidelberg, Germany. Tel. No.: +49 6221 42 2495; Fax No.: +49 6221 42 3326; E-mail: k.braun@dkfz.de Received: 2010.03.10; Accepted: 2010.06.22; Published: 2010.06.27 Abstract Progress in genome research led to new perspectives in diagnostic applications and to new promi[r]

which could be attributed to the morphology, surface defects, band gap and surface area. The formationmechanisms of different ZnO morphologies were also investigated based on the experimental results.Ó 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Soci[r]

nanocomposites by a sol–gel method was investigated using differential thermal analysis (DTA), X-ray diffraction(XRD) and transmission electron microscopy (TEM) techniques. Thermal treatment of the precursor at 400◦C in air resulted in the formationof WO3/TiO2nanocomposites with a particle si[r]

SiC with a small amount of SiO2. Compared with the IRabsorption of the bulk SiC (794 cm-1), the blue shift at832 cm-1is attributed to the quantum size effects.The previous report [19] indicated that porous carbonmaterial could increase the formation rate of SiC NWs byfavoring th[r]

largeremergences of {1 0 1 0} and {0 0 0 1} surfaces would be

reheating, but degrades.A more important classification of polymers is based on molecularstructure. According to this system, the polymer could be one of the following:1. Linear-chain polymer2. Branched-chain polymer3. Network or gel polymerIt has already been observed that, in o[r]

mevalonate from acetyl-CoA (Figure 24.31). The first step is the ␤-ketothiolase–catalyzed Claisen condensation of two molecules of acetyl-CoA to form acetoacetyl-CoA. In the next reaction, acetyl-CoA and acetoacetyl-CoA join to form 3-hydroxy-3-methylglutaryl-CoA, which is abbreviated H[r]

The results from Raman spectra and XRD patterns demonstratethat the obtained nanorods have the single crystalline rutilestructure of SnO2. The present process has the advantage of beingvery simple, its yields are high and the morphology of nanorodscan be controlled.Further work[r]

solution, followedby an addition of 15 ml n-propanol and 0.408 gurea. In the first step, the mixed solution was putinto a three-necked flask, which was heated andmaintained at 82°C for 5 h under stirring. Aftercentrifugalized, a yellow precipitate was obtained.The product was repeatedly washed[r]

... cinchona alkaloid derived bifunctional catalysts Our approach combines organocatalytic Henry reaction and concept of dynamic kinetic resolution, and it also provides an access to biologically important... cinchona alkaloid derivatives as catalysts In this process, (DHQD)2AQN 1-25 acts as a bifun[r]

the sample for recording the IR spectra. Thermogravimetricanalysis (TGA) was performed with a Perkin-Elmer TGA-7system (Norwalk, CT, USA) at a scan rate of 10 °C min to800 ° CinN2atmosphere. The morphologies of the poly-mer grafted silica nanoparticles and the polymeric nano-capsules w[r]

EURASIP Journal on Applied Signal Processing 2004:7, 990–1000c 2004 Hindawi Publishing CorporationA Digital Synthesis Model of Double-ReedWind InstrumentsPh. GuillemainLaboratoiredeM´ecanique et d’Acoustique, Centre National de la Recherche Scientifique, 31 chemin Joseph-Aiguier,13402[r]

Synthesisofinulinesterby30mg/ml Proleather FP-F is performed in 15 ml anhy-drous DMF containing 0.017 M (6.7%, w/v) inulin and 0.48 mol vinyl acetate/molRU. The reaction mixture is shaken at 250 rpm and 50◦C in a temperature-controlled New Brunswick Scientific C24 orbital shaker (Edison, NJ) for 72 h[r]

(0.1 M, 7.4 pH) and release of p - nitroaniline as well as TMA - gly was measured and found to be similar to its linear counterpart of the polymer (TMA - gly:SA 30:70) [41, 42] , indicating that crosslinking has little effect on the degradation behavior of this particular polym[r]

Saji et al. Nanoscale Research Letters 2011, 6 :521http://www.nanoscalereslett.com/content/6/1/521© 2011 Saji et al; licensee Springer. This is an Open Access article distributed under the terms of the Creative Co mmons At tributionLicense (http://creativ ecommons.org/licenses/by/2.0), wh ich[r]

(C1, n=3-6, 8-10, Fig. 19) confirming the previous findings and that the orientational order photoinduced in the material is higher with the derivatives possessing lower spacer length. Relevant thermal stability of the photoinduced surface gratings and high stability of the birefringen[r]

face, in the presence of sacrificial initiator. The lack ofcontrol is due to the low concentration of Cu (II) [47]. Thiscan also be inferred from the lowering of the PDI withincreasing polymerization time, as shown in Table 3.An amphiphilic diblock polymer based on 2-hydro[r]

oligosilsesquio xanes (POSS ): from synthesis to application. AdvOrganomet Chem 2008, 57:1.13. Sahoo NG, Cho JW, Li L, Chan SH: Polymer nanocomposites based onfunctionalized carbon nanotubes. Prog Polym Sci 2010, 35:837.14. Jin J, Dong Z, He J, Li R, Ma J: Synthesis of novel por[r]

[17] J. Yu, H. Guo, S.A. Davis, S. Mann, Adv. Funct. Mater. 16 (2006) 2035.[18] P.D. Cozzoli, A. Korrowski, H. Weller, J. Am. Chem. Soc. 125 (2003)14539.[19] T. Kasuga, M. Hiramatsu, A. Hoson, T. Sekino, K. Niihara, Langmuir 14(1998) 3160.[20] B.B. Lakshmi, C.J. Patrissi, C.R. Martin, Chem. Mater. 9[r]

Ebook Handbook of polymer synthesis the book analyzes biodegradable polymers for biomedical applications; Investigates the use of polyolefins, polymeric dienes, aromatic polyethers, polymides, and metalcontaining macromolecules; and covers polymers of Acrylic Acid, Methacrylic Acid, and Maleic Acid.