Macromolecular Symposia

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Transformation of “living” carbocationic and other polymerizations to controlled/“living” radical polymerization
Macromolecular Symposia - Tập 132 Số 1 - Trang 85-101 - 1998
Krzysztof Matyjaszewski
AbstractTransformation of “living” carbocationic polymerization of styrene and isobutene to controlled atom transfer radical polymerization (ATRP) is described and formation of the corresponding AB and ABA block copolymers with styrene (St), methyl methacrylate (MMA, methyl acrylate (MA) and isobornyl acrylate (IBA) was demonstrated. A similar approach was applied ...... hiện toàn bộ
Self‐Metathesis of 10‐Undecen‐1‐Ol with Ru‐Amine‐Based Complex for Preparing the Soft Segment and Chain Extender of Novel Castor Oil‐Based Polyurethanes
Macromolecular Symposia - Tập 368 Số 1 - Trang 30-39 - 2016
Larissa R. Fonseca, James A. Bergman, Michael R. Kessler, Samy A. Madbouly, Benedito dos Santos Lima Neto
SummarySelf‐metathesis of the terminal olefin in 10‐undecen‐1‐ol was conducted in the presence of [RuCl2(PPh3)2(perhydroazepine)] complex and ethyl diazoacetate (EDA) to form a bioderived diol. The diol was utilized as soft segment and chain extender in polyurethane reactions wit...... hiện toàn bộ
In‐situ Synthesis and Characterization of Polyamide 6/POSS Nanocomposites
Macromolecular Symposia - Tập 249-250 Số 1 - Trang 295-302 - 2007
Subramaniyan Ramasundaram, Kap Jin Kim
AbstractThe nanocomposites of polyamide 6 (PA6) and polyhedral oligomeric silsesquioxane (POSS) containing primary and secondary amino groups were synthesized through in‐situ polymerization. The chemical structure of the PA6/POSS nanocomposites was characterized with FT‐IR and 1H‐NMR spectroscopies. The solution viscosity results showed the inc...... hiện toàn bộ
Modification of Recycled Polymer Blends with Activated Natural Zeolite
Macromolecular Symposia - Tập 217 Số 1 - Trang 391-400 - 2004
Strashimir Djoumaliisky, Peter Zipper
AbstractThe growing interest in the natural zeolite is based on some specific peculiarities of its structure, which after dehydration enables adsorption processes of some polymer molecules and/or segments to take place on the zeolite surface. The main goal of the study is to investigate the effect of dehydrated zeolite on the flow behavior, mechanical properties an...... hiện toàn bộ
Application of network models to physical gels
Macromolecular Symposia - Tập 93 Số 1 - Trang 187-194 - 1995
Allan Clark, Katsuyoshi Nishinari, Simon B. Ross‐Murphy, Mineo Watase
AbstractThere are a number of physical models which describe properties of physical gels, such as the time dependence of viscoelastic properties, stress‐strain dependence, and the concentration dependence of gel(ation) time and of gel modulus. One of the latter, due to ourselves, has been useful for fitting data for a number of systems including PVC and gelatin gel...... hiện toàn bộ
Routes to Rubber Nanocomposites
Macromolecular Symposia - Tập 291-292 Số 1 - Trang 95-105 - 2010
Amit Das, Klaus Werner Stöckelhuber, René Jurk, Gert Heinrich
AbstractThis paper presents recent developments in rubber nanocomposites from the laboratory of the authors. In particular, the preparation of rubber nanocomposites with improved performance from layered silicates, carbon nanotubes and in situ sol‐gel derived silica nanoparticles incorporated in different elastomers and by different metho...... hiện toàn bộ
Comparative Properties of Thermoplastic Polyurethane Adhesive Filled with Natural or Precipitated Calcium Carbonate
Macromolecular Symposia - Tập 301 Số 1 - Trang 63-72 - 2011
Jessica Donate‐Robles, José Miguel Martín‐Martínez
AbstractSummary: The rheological, mechanical and adhesion properties of thermoplastic polyurethane adhesive (TPU) containing natural ultramicronized or precipitated nanometric calcium carbonate filler were compared. Precipitated calcium carbonate addition did not noticeably improve the rheological properties of filled TPU with respect to the ...... hiện toàn bộ
Multilayers by adsorption of functional polyelectrolytes
Macromolecular Symposia - Tập 126 Số 1 - Trang 105-121 - 1998
Valery Charlier, André Laschewsky, B. Mayer, Erik Wischerhoff
AbstractThe synthesis of polycations bearing reactive groups, namely tertiary anilines located in the side chain or in the main chain, is described. These polyions are employed in conventional alternating polyelectrolyte multilayer assembly or in a modified build‐up process including an azo coupling reaction on the topmost layer after every polycation adsorption st...... hiện toàn bộ
Percolation in carbon black filled epoxy resin
Macromolecular Symposia - Tập 104 Số 1 - Trang 261-268 - 1996
Ruediger Schueler, J. Petermann, Karl Schulte, Hans‐Peter Wentzel
AbstractThe conditions to form a conductive network in carbon black filled epoxy resin were examined. It was found that the formation is controlled by particle‐particle interaction which can be influenced by shear forces or by the ionic concentration of the resin. Therefore the network morphology and thus the percolation threshold depends strongly upon the processi...... hiện toàn bộ
Supercritically‐Dried Alginate Aerogels Retain the Fibrillar Structure of the Hydrogels
Macromolecular Symposia - Tập 273 Số 1 - Trang 80-84 - 2008
Mike Robitzer, Laurent David, Cyrille Rochas, F. Di Renzo, F. Quignard
AbstractSummary: SAXS patterns of a Ca‐alginate hydrogel and of the derived alcogel and aerogel have been recorded. All patterns correspond to disordered arrays of rod‐like fibrils. The calculated size of the fibrils of the aerogel, 8 nm, is in good agreement with the results of scanning electron microscopy and N2 adsorpt...... hiện toàn bộ
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