Synthesis of the first hyperbranched polyorganoethoxysilsesquioxanes and their chemical transformations to functional core–shell nanogel systems

Abstract

Hyperbranched polyvinyl‐ and polymethylethoxysiloxanes were obtained for the first time by heterofunctional polycondensation of the corresponding organoethoxysilanols derived from relevant monosodium organodiethoxysilanolates. Synthesized structures were characterized using 29Si NMR, 1H NMR and infrared spectroscopies, gel permeation chromatography and elemental analysis. On the basis of the obtained hyperbranched polyorganoethoxysiloxanes, new ‘core–shell’ structured polyvinyl‐ and polymethylsilsesquioxanes with adjustable sizes, different crosslinking densities and variable chemical natures of the core–shell surroundings were prepared, investigated and characterized using 1H NMR and infrared spectroscopies, gel permeation chromatography, thermogravimetric analysis, differential scanning calorimetry and elemental analysis. © 2015 Society of Chemical Industry

Benzocyclobutene-functionalized hyperbranched polysiloxane for low-k materials with good thermostability

“…where D, L, and T are the relative amounts of D, L, and T units, respectively. These units can be evaluated from the ratio of the integral intensities of the peaks in the 29 Si-NMR spectrum [ 31 ]. Using this equation (1) , the DB of HB-DEMS was found to be approximately 0.45.…”

Dynamics of Dual Scale-Free Polymer Networks

“…We believe that our findings can be helpful for studies of supramacromolecular complexes, such as core-shell nanogel systems [10]. From the theoretical point, further extensions of the model through inclusion of excluded volume and hydrodynamic interactions can be of much interest.…”

“…In particular the concept of scale-free networks was applied with great success to World Wide Web [1,2], metabolic networks in biological organisms [3], reaction-diffusion processes [4], financial networks [5], and transport networks [6,7], to name only a few, but also to model hyperbranched polymers [8,9]. Inspired by recent experimental techniques allowing to make chemical transformations from hyperbranched polymers to functional core-shell nanogel systems [10] as well as to being interested in the fundamental role of the presence of loops in the polymer networks (e.g. in crosslinked systems [11] and elastomers [12]), we study in this article a new kind of polymer networks, the dual scale-free networks.…”

Dynamics of Dual Scale-Free Polymer Networks

“…Our findings can be helpful for studies of supramacromolecular complexes, such as core–shell nanogel systems [ 10 ]. From the theoretical point of view, further extensions of the model through inclusion of excluded volume and hydrodynamic interactions can be of much interest.…”

“…In particular, the concept of scale-free networks was applied with great success to the World Wide Web [ 1 , 2 ], metabolic networks in biological organisms [ 3 ], reaction–diffusion processes [ 4 ], financial networks [ 5 ], and transport networks [ 6 , 7 ], to name only a few, but also to model hyperbranched polymers [ 8 , 9 ]. Inspired by recent experimental techniques allowing chemical transformations to be made from hyperbranched polymers to functional core–shell nanogel systems [ 10 ], and due to our interest in the fundamental role of the presence of loops in polymer networks (e.g., in crosslinked systems [ 11 ], elastomers [ 12 ], and porous materials [ 13 , 14 ]), we study in this article a new kind of polymer network—the dual scale-free networks.…”