Journal ArticleDOI
Glass transitions of topologically interpenetrating polymer networks
TLDR
In this paper, two component topologically-interpenetrating polymer networks were made of the SIN type composed of two polyurethanes (a polyether-based and a polyester-based) in combination with an epoxy resin, a polyacrylate and two unsaturated polyesters.Abstract:
Two component topologically-interpenetrating polymer networks were made of the SIN type (simultaneous interpenetrating network) composed of two polyurethanes (a polyether-based and a polyester-based) in combination with an epoxy resin, a polyacrylate and two unsaturated polyesters. The linear polymers and/or prepolymers were combined in solution and in bulk together with the necessary crosslinking agents and catalysts. Films were cast and chains extended and crosslinked in situ. All of the IPN's exhibited one glass transition (Tg) intermediate in temperature to the Tg's of the component networks, and as sharp as the Tg's of the components. This suggests that phase separation may not occur and thus some chain entanglement (interpenetration) of the two networks is involved. The observed Tg's are always several degrees lower than the arithmetic means of the component Tg's. A theory based on interpenetration is developed to account for this.read more
Citations
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Journal ArticleDOI
Interpenetrating Polymer Networks
TL;DR: Interpenetrating polymer networks (IPN) are a unique type of polyblend, synthesized by swelling a crosslinked polymer (I) with a second monomer (II), together with crosslinking and activating agents, and polymerizing monomer II in situ as discussed by the authors.
Book
Phase-Separated Interpenetrating Polymer Networks
Yuri S. Lipatov,T. T. Alekseeva +1 more
TL;DR: In this article, the formation and properties of interpenetrating polymer networks (IPNs) are considered, and the physicochemical properties of phase-separated IPNs are analyzed.
Journal ArticleDOI
Mechanical and Thermal Properties of Epoxy Resin Modified with Polyurethane
TL;DR: In this article, the impact strength, tensile strength, elongation at break and flexural strength were estimated as functions of polyurethane content and isocyanate index.
Journal ArticleDOI
PLLA microalloys versus PLLA nanoalloys: preparation, morphologies, and properties.
TL;DR: This paper fabricates nanoalloys and microalloys that exhibit not only high transparency in the visible region, but also significantly improved ductility and impact strength, compared with neat PLLA, and investigates the structure-property relationships of the prepared alloys.
References
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Journal ArticleDOI
Interpenetrating Polymer Networks of Poly(ethyl acrylate) and Poly(styrene-co-methly methacrylate). I. Morphology via Electron Microscopy
Journal ArticleDOI
A topologically interpenetrating elastomeric network
TL;DR: In this article, two different elastomers, a crosslinked polyether-based poly(urethane-urea) and a linear poly(butadiene-acrylonitrile), are mixed, together with crosslinking agents and stabilizers, films cast, and subsequently cured to form the IPN.
Journal ArticleDOI
Polybutadiene/polystyrene interpenetrating polymer networks
TL;DR: In this article, a wide range of polybutadiene (PB) and polystyrene (PS) compositions were synthesized and electron microscopy studies revealed an irregular cellular structure of a few hundred Angstrom diameter with the first component, PB, making up the cell walls.
Journal ArticleDOI
Structure‐Property relationships in polyacrylate‐poly(urethane‐urea) interpenetrating polymer networks
TL;DR: In this article, a phase inversion occurred from the U-phase particles in A-phase matrix to the "A-phase in Uphase matrix" at A/U ≑ 30/70 as the U phase content increases.
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