Results 211 to 220 of about 20,638 (260)

Effects of polydimethylsiloxane concentration on properties of polyurethane/polydimethylsiloxane hybrid dispersions

Journal of Applied Polymer Science, 2006
AbstractA series of waterborne polyurethane (WPU) derived from isophorone isocyanate and poly(tetramethylene glycol) were modified by hydroxyl‐terminated polydimethylsiloxane (HPMS). The solutions were then cast into films named as PUHS. Rheological behavior of the emulsions were studied using Rheometer and morphology was studied with transmission ...
Guiqiang Fei, Yiding Shen, Haihua Wang, Yue Shen   +3 more
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Cationic Photocrosslinkable Polydimethylsiloxane. III. Synthesis and Photocrosslinking of Polydimethylsiloxane Bearing Oxetane Groups

Journal of Macromolecular Science, Part A, 1997
Abstract From 3-hydroxymethyl-3-methyl oxetane, we synthesized three oxetane monomers with allylic, diethoxysilane or triethoxysilane functions. These monomers allowed us to prepare different polydimethylsiloxanes bearing oxetane groups by two routes.
Lecamp, Laurence, Youssef, Boulos, Lebaudy, Philippe, Bunel, Claude   +3 more
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Rheology of trimethylsiloxysilsesquioxanes in polydimethylsiloxane

Russian Journal of Physical Chemistry A, 2009
Properties of the MQ polymer solution in PDMS elastomer in the temperature range 266.7–351.1 K are investigated using the viscometry technique. On the basis of viscosity and density isotherms, the solutions in question are shown to belong to the systems whose viscosity is a function of free fluctuation volume of their constituent components.
V. I. Kovalenko, I. I. Skorokhodov, B. V. Molchanov, A. A. Savitskii, V. V. Belyaev   +4 more
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Thermodynamics of polydimethylsiloxane solutions

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1973
Solvent chemical potentials and heats of dilution have been obtained for systems containing polydimethylsiloxane and solvents comprising normal and branched alkanes, aromatic hydrocarbons and dimethylsiloxane oligomers. Using the Flory–Huggins approximation to eliminate the combinatorial contribution to ΔSM, the results are expressed as concentration ...
Ramlal S. Chahal, Wei-Pang Kao, Donald Patterson   +2 more
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Emulsion Polymerized Polydimethylsiloxane

Rubber Chemistry and Technology, 1983
Abstract The observations are consistent with the formation of grafts of hydrophilic silicates to the silanol chain ends at the surface of the PDMS emulsion particles prior to removal of the water. The silicates may be introduced into the system directly or through the alkaline colloidal silica, which contains appreciable amounts of dissolved ...
Daniel Graivek, David J. Huebner, John C. Saam   +2 more
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Polydimethylsiloxane quenchable vitrimers

Polymer Chemistry, 2017
Reprocessable and recyclable PDMS vitrimers can be transformed into “quenched” vitrimers that exhibit conventional elastomer properties.
Tyler Stukenbroeker, Wendi Wang, Johan M. Winne, Filip E. Du Prez, Renaud Nicolaÿ, Ludwik Leibler   +5 more
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On the thermal decomposition of polydimethylsiloxanes

Science of The Total Environment, 1988
Abstract The IRS laser-induced degradations of polydimethylsiloxane (PDMS) vapors have been studied in order to determine whether the high temperature thermal properties of the dimethylsiloxane unit is best represented by SiO bond rearrangement (the conventional pyrolysis mechanism) or SiC bond cleavage (the thermodynamic reaction pathway).
Jon M. Bellama, William F. Manders
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A Study of Monodispersed Polydimethylsiloxanes

Journal of the Chinese Chemical Society, 1988
AbstractA series of monodispersed polydimenthylsiloxanes (PDMS) with molecular weights from 3K to 156K were synthesized. The intrinsic viscosity and absolute molecular weight of each monodispersed PDMS was measured and the Mark‐Houwink equation for the PDMS series in toluene at 25°C was derived: [eta;]=2.88 × 10−4 M0.613.
Liaw, W. C., Yang, Mei-Hui
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Environmental Occurrence of Polydimethylsiloxane

Environmental Science & Technology, 1997
An extensive monitoring program was conducted to determine the occurrence of polydimethylsiloxane (PDMS) in environmental compartments impacted by consumer waste disposal practices. Eight wastewater treatment plants, representative of those found in North America, were monitored to determine PDMS removal during wastewater treatment.
N. J. Fendinger, D. C. McAvoy, W. S. Eckhoff, B. B. Price   +3 more
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Attachment of drugs to polydimethylsiloxanes

European Polymer Journal, 1984
Abstract Polydimethylsiloxane, which is a biologically inert polymer, was used as a carrier polymer for drugs. Functional groups were introduced into the polymer to enable attachment to drugs. Polymers (and oligomers) having carboxyl, amine or hydroxyl groups were prepared from polydimethylsiloxanes having different distributions of SiH groups which
A. Bachrach, A. Zilkha
openaire   +1 more source