Results 91 to 100 of about 92,048 (122)

Branching features of amylopectins and glycogen determined by asymmetrical flow field flow fractionation coupled with multiangle laser light scattering.

Biomacromolecules, 2007
The aim of this work was to characterize starch polysaccharides using asymmetrical flow field flow fractionation coupled with multiangle laser light scattering.
A. Rolland-Sabaté, P. Colonna, M. Méndez-Montealvo, V. Planchot   +3 more
semanticscholar   +1 more source

Phase behavior of hyperbranched polymer systems: experiments and application of the perturbed-chain polar SAFT equation of state.

Journal of Physical Chemistry B, 2009
Vapor-liquid equilibrium data for systems of hyperbranched polymer (HBP) and carbon dioxide are reported for temperatures of 285-455 K and pressures up to 13 MPa.
M. Kozłowska, Bas F Jürgens, C. Schacht, J. Gross, T. W. de Loos   +4 more
semanticscholar   +1 more source

Control of polymer topology by chain-walking catalysts.

Chemistry, 2002
Chain-walking catalysts are demonstrated to control the branching topology of polyethylene by tuning the competition between monomer insertion and chain isomerization (walking).
Z. Guan
semanticscholar   +1 more source

Copolymers of ethylene imine and N-(2-hydroxyethyl)-ethylene imine as tools to study effects of polymer structure on physicochemical and biological properties of DNA complexes.

Bioconjugate chemistry, 2002
A series of five poly[(ethylene imine)-co-N-(2-hydroxyethyl-ethylene imine)] copolymers with similar molecular weights and different degrees of branching was established to study structure-function relationship with regard to physicochemical and ...
D. Fischer, A. von Harpe, Klaus Kunath, H. Petersen, Youxin Li, T. Kissel   +5 more
semanticscholar   +1 more source

Multibrominated hyperbranched polymers: synthesis and further functionalizations by ARGET ATRP or click chemistry.

Macromolecular rapid communications, 2012
Hyperbranched polymers with multiple alkyl bromide peripheral groups were synthesized by the copolymerization of styrene with ethylene glycol dimethacrylate (2.5, 5.0, 7.5, or 10.0 mol% relative to styrene) in the presence of CBr(4) (10-20-fold excess vs.
D. Popescu, N. Tsarevsky
semanticscholar   +1 more source

Short chain branching profiles in polyethylene from the Phillips Cr/silica catalyst

, 2007
SEC and on-line Fourier transform infrared spectroscopy analysis have been combined to study branching profiles from the Phillips Cr/silica catalyst.
Paul J. Deslauriers, M. Mcdaniel
semanticscholar   +1 more source

High-performance polymer solar cells with efficiency over 18% enabled by asymmetric side chain engineering of non-fullerene acceptors

Science China Chemistry, 2021
Shihao Chen, Lingwei Feng, Tao Jia, Jianhua Jing, Zhicheng Hu, Kai Zhang, F. Huang   +6 more
semanticscholar   +1 more source

Polyethyleneimine functionalized single-walled carbon nanotubes as a substrate for neuronal growth.

Journal of Physical Chemistry B, 2005
We report the synthesis of a single-walled carbon nanotube (SWNT) graft copolymer. This polymer was prepared by the functionalization of SWNTs with polyethyleneimine (PEI).
Hui Hu, Yingchun Ni, S. Mandal, Vedrana Montana, Bin Zhao, R. Haddon, V. Parpura   +6 more
semanticscholar   +1 more source

Chain Transfer to Polymer in Emulsion Polymerization

, 2001
Chain transfer to polymer in emulsion polymerizations of acrylate monomers and vinyl acetate has been studied using 13 C NMR spectroscopy to elucidate the chemistry by which chain transfer occurs and to quantify the mol% branches resulting from the ...
David Britton, P. Lovell, F. Heatley, R. Venkatesh   +3 more
semanticscholar   +1 more source

Dendrimer Chemistry: Supramolecular Perspectives and Applications

, 2012
Dendritic chemistry, from its initial development to its application in the construction of utilitarian devices andmaterials, has provided a great amount of proverbial cement for interdisciplinary integration.
C. Moorefield, S. Perera, G. Newkome
semanticscholar   +1 more source