Change of molecular mobility during formation of epoxy allylic interpenetrating polymer networks

Michal'chuk, V.M; Nikolaevskii, A. N.; Maklakov, L. I.; Lipatov, Yu.S.

doi:10.1016/s0032-3861(00)00488-2

Cited by 6 publications

(5 citation statements)

References 17 publications

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“…The following investigations on IPNs have fully confirmed the concept5–8, 11 that the simultaneous chemical reactions are accompanied by phase separation. In Reference 7 for the first time, it was shown that phase separation in IPNs proceeds according to spinodal mechanism.…”

Section: Introductionmentioning

confidence: 53%

“…However, analysis of the conditions of phase separation during chemical reaction and their interconnection with the reaction kinetics have not been investigated up to now. Meanwhile, for interpenetrating polymer networks (IPN), there are many papers showing the interdependence between chemical reactions of the formation of two independent networks and phase separation 2–11. Formation of IPNs is based on the simultaneous reactions of the synthesis of two cross‐linked polymers under conditions where each polymer is formed according its own reaction mechanism (for example, radical polymerization and polycondensation).…”

Section: Introductionmentioning

confidence: 99%

“…Since the publication of the famous book by Sperling2 it has been accepted that the two parallel reactions are not linked, for many IPNs of various chemical compositions, and those, especially based on polyurethanes and polyacrylates, ie there is no chemical interaction between the two network components. At the same time, as early as 1989, it was established that the kinetic conditions of both reactions are interdependent 3–9…”

Section: Introductionmentioning

confidence: 99%

“…As an alternative, studying the corresponding processes may be performed in blends of linear polymers. For example, the mechanism of reaction‐induced phase separation of the mixture of a linear polymer with a monomer was investigated,8 when the monomer polymerizes in the presence of this polymer. It was found that in such a system, phase separation proceeds according to the spinodal mechanism that is typical of isothermal phase separation of blends of linear polymers.…”

Section: Introductionmentioning

confidence: 99%

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Phase separation in blends of linear polymers formed in situ according to different mechanisms

Lipatov

Kosyanchuk

Nesterov

2002

Polymer International

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The in situ formation of blends of two incompatible polymers was studied. The kinetics of simultaneously proceeding reactions of radical polymerization of methyl methacrylate and polyaddition reaction of polyurethane formation was investigated for various ratios of monomeric compounds in the reaction mixture. It was established that the kinetics of formation of each polymer in the mixture depends on the presence of the other and on the kinetics of its formation. These parallel reactions are accompanied by phase separation at a definite conversion degree of each monomer. The onset of phase separation does not affect the course of the kinetic curves. The regularities of phase separation in connection with reaction kinetics were investigated by light scattering. It was found that because of the difference in the rates of the two reactions, the ratio of the polymers formed in the reaction mixture continually changes in time. In spite of this, initial stages of the phase separation may be considered as proceeding according to the spinodal mechanism. Values of amplification factors were calculated which depend on the component ratio and reaction rates. It was established that reaction‐induced phase separation determines the formation of the interconnected morphology immediately after the onset of phase separation, when the composition of the polymer blends has not yet reached its equilibrium value. © 2002 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phase separation in blends of linear polymers formed in situ according to different mechanisms

Lipatov

Kosyanchuk

Nesterov

2002

Polymer International

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“…There are many studies of the kinetic of the synthesis of the interpenetrating networks and mechanical, dielectric, optical, NMR properties of these systems. [1][2][3][4][5][6][7][8] The interpenetrating networks build from two similar components were also investigated. [9][10][11] The local interpenetrating effects may take place also in usual network systems, prepared by normal vulcanization of a polymer melt or cross-linked by other methods.…”

Section: Introductionmentioning

confidence: 99%

Model Theory of Visco‐Elastic Properties and Relaxation Spectra of Two Different Interpenetrating Polymer Networks

Gotlib

Torchinskii²,

Toshchevikov

et al. 2009

Macromolecular Symposia

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Dynamic viscoelastic models of the system of two different interpenetrating polymer networks with different topology and type of interactions were used for calculating spectra of relaxation times of the system under consideration. It was shown, that two branches of the relaxation spectrum appear for two models of interpenetrating networks with different components. One of the branches is the branch of the collective motion of double network consisting of two initial interacting networks. Parameters of this branch of relaxation spectrum are defined by both own elastic constants of each of interacting networks and by effective quasielastic interactions between two networks. This branch is the low frequency one and is described by broad relaxation time spectrum. The second branch is the high frequency one and characterizes mutual local motions of two interacting networks. The relaxation spectrum of this branch is comparatively narrow and depends on the quasi-elastic constants and mutual friction which is defined by the entanglements of the networks and by its effective rigidity. The second branch does not contain extremely large relaxation times for infinitely large networks.

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Interpenetrating Polymer Networks

Sperling

2004

Encyclopedia of Polymer Science and Technology

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An interpenetrating polymer network, IPN, is a combination of two polymers in network form, at least one of which is synthesized and/or cross‐linked in the immediate presence of the other (L. H. Sperling, Interpenetrating Polymer Networks and Related Materials, Plenum Press, New York, 1981). An IPN is distinguished from other multipolymer combinations, such as polymer blends, blocks, and grafts, in two ways: ( 1 ) an IPN swells, but does not dissolve in solvents; and ( 2 ) creep and flow are suppressed. This article discusses synthesis, morphology, glass transitions, and mechanical behavior of IPNs, and outlines known and proposed applications of these materials. Some applications of note include sound and vibration damping, biomedical applications, natural products and renewable resources, tough and impact‐resistant materials, etc.

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Change of molecular mobility during formation of epoxy allylic interpenetrating polymer networks

Cited by 6 publications

References 17 publications

Phase separation in blends of linear polymers formed in situ according to different mechanisms

Phase separation in blends of linear polymers formed in situ according to different mechanisms

Model Theory of Visco‐Elastic Properties and Relaxation Spectra of Two Different Interpenetrating Polymer Networks

Interpenetrating Polymer Networks

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