Results 211 to 220 of about 6,892 (258)

Gradient interpenetrating polymer networks

Journal of Materials Science, 1995
The methods of synthesis and properties of gradient interpenetrating polymer networks (IPN) are discussed based on literature and authors' own experimental data. Gradient IPN can be treated as a sequence of an infinite number of layers of IPNs, whose composition and properties vary gradually from the surface to the core of specimens. These are analysed
Yu. S. Lipatov, L. V. Karabanova
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Recent Advances in Interpenetrating Polymer Networks

Polymer Engineering & Science, 1984
AbstractInterpenetrating polymer networks (IPN's) can be defined as a combination of two polymers in network form, at least one of which was synthesized and/or crosslinked in the immediate presence of the other. Historically, the science of IPN's began with the papers of J. R.
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Swollen interpenetrating polymer networks

Polymer, 2000
Abstract The swelling in common (benzene) and selective (CCl4) solvents and small angle X-ray scattering (SAXS) of interpenetrating polymer networks (IPNs) of PPO/PMMA in all composition intervals are studied. It is shown that in both solvents IPNs swell better than the pure crosslinked polymers; that may be caused by a smaller degree of crosslinking
L.Z. Rogovina, A.T. Dembo, P.R. Skitanth Sharma, H.L. Frisch, M. Schulz   +4 more
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Interpenetrating Polymer Networks (IPNs) in Dental Polymers and Composites

Journal of Adhesion Science and Technology, 2009
An interpenetrating polymer network (IPN) is a material containing two polymers, each in network form. In biomaterials used in dentistry, the IPN-like nanostructures are used in denture base polymers, denture teeth and fibre-reinforced composites.
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Latex Interpenetrating Polymer Networks

International Journal of Polymeric Materials and Polymeric Biomaterials, 1972
Abstract Latex interpenetrating polymer networks are a unique type of polymer blend, synthesized by swelling crosslinked seed latex particles of polymer I with monomer II, plus cross-linking agents, and polymerizing monomer II in situ. In a manner similar to polymer blends generally, polymer 1 and II are incompatible to greater or lesser extents, and ...
L H. Sperling, Tai-Woo Chiu, C. P. Hartman, D. A. Thomas   +3 more
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Topologically Interpenetrating Polymer Networks

1974
Ever since the concept of chemical topology was introduced,1 a number of investigators have prepared molecules showing topological isomerism,2–16 most of which were catenanes, i.e., interlocking rings with no chemical bonds between them, shown below.
K. C. Frisch, D. Klempner, H. L. Frisch, H. Ghiradella   +3 more
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Polymer blends and interpenetrating polymer networks at the interface with solids

Progress in Polymer Science, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
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Structure of interpenetrating polymer networks

Journal of Polymer Science Part B: Polymer Physics, 1998
A possible model for the formation of interpenetrating polymer networks is suggested. Phase separation is assumed to be faster than gelation. This implies that domains rich in either component grow first until late stages of spinodal decomposition. In these domains, short linear chains are crosslinked, leading to large branched macromolecules.
I. Chikina, M. Daoud
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Swelling of interpenetrating polymer networks

Journal of Polymer Science Part A: Polymer Chemistry, 1993
AbstractWe have studied the densities, kinetics, and equilibrium degree of swelling in a number of different solvents of poly(carbonate urethane)/poly(methyl methacrylate) and poly(carbonate urethane)/poly(vinyl pyridine) interpenetrating polymer networks (IPN's). The kinetics of solvent uptake are often anomalous.
L. Rogovina, Peiguang Zhou, H. L. Frisch
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Microstructures in interpenetrating polymer networks

Superlattices and Microstructures, 1998
Abstract Prevalence of patterned microstructures in interpenetrating polymer networks is well documented experimentally. Thermodynamic theories explaining this feature nonetheless have not been forthcoming. These enmeshed structures carry elastic energy and elevate in the thermodynamic limit the free energy of mixing.
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