Effect of compatibilizing compounds on the viscoelastic properties of interpenetrating polymer networks

Lipatov, Yu.S.; Alekseeva, T. T.; Kosyanchuk, L. F.; Rosovitsky, V. F.; Babkina, N. V.

doi:10.1016/s0032-3861(99)00088-9

Cited by 11 publications

(8 citation statements)

References 12 publications

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“…As we showed earlier in [14], such changes to a large extent are due to changes in the kinetics of polyurethane formation. Since iron and copper chelates are active catalysts for urethane formation [7], adding them to the incipient semi-IPN leads to a sharp increase in the rate of polyurethane formation and a significant increase in the viscosity of the system, and consequently to acceleration of MMA polymerization due to the decrease in the chain termination reaction rate [15].…”

Section: Characteristics Of the Kinetics Of Formation Of Semi-ipns Insupporting

confidence: 54%

“…We studied the kinetics of simultaneous formation of crosslinked polyurethane and linear PMMA in semi-IPNs of composition PU/PMMA = 70/30 in the presence of 1 wt.% Fe(acac) 3 , Cr(acac) 3 , Cu(eacac) 2 , and we compared with the kinetic parameters obtained previously for the formation of the same semi-IPNs but with composition PU/PMMA = 50/50 [14]. Figure 1 shows the kinetic curves (conversion a vs. time) for the formation of crosslinked polyurethane and linear PMMA in semi-IPNs with composition PU/PMMA = 70/30 (Fig.…”

Section: Characteristics Of the Kinetics Of Formation Of Semi-ipns Inmentioning

confidence: 99%

“…Depending on the PU/PMMA ratio in the system we may see both synergism (observed in [14]) and the opposite effect on phase segregation from the kinetics of formation of semi-IPNs in the presence of metal chelates and their complexation with the matrix.…”

Section: --mentioning

confidence: 99%

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Kinetics of formation of a linear polymer-polymer network system in the presence of 3d metal chelates

et al. 2006

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For semi-interpenetrating polymer networks (semi-IPNs) based on an incompatible polyurethane network/linear polymethylmethacrylate pair formed in situ in the presence of 3d metal chelates, we have studied the effect of the system composition on the kinetics of formation of the components and the nature of complex formation between the metal compound and the polymer matrix. The ratio of the system components has been shown to have an effect on the selection of the macroligand in formation of complexes of the metal chelate with the polar groups of the semi-IPN, where the general character of the kinetic behavior for the formation of the network and the linear polymer is preserved.Key words: polyurethane network, linear polymethylmethacrylate, kinetics, EPR, complexes of 3d metal chelates.In recent years, scientific and practical interest has been stimulated in the problem of the compatibility of topologically connected binary polymer mixtures: interpenetrating polymer networks (IPNs), semi-interpenetrating polymer networks (semi-IPNs), mixtures of linear polymers formed in situ. Such systems consist of linear and/or networked components, not chemically bonded and interlaced with each other. They are characterized by incomplete phase separation, due to kinetic factors and diffusional constraints. The faster the reaction rate for the formation of the components of the mixture, the less the system should experience phase separation [1].Another important factor affecting the process of phase separation is specific interactions in the system between its components. Donor-acceptor bonding of polar groups from two incompatible components of the mixture promotes incompleteness of phase separation, like the kinetic conditions and diffusional constraints. Targeted slowing of phase separation in such systems can be done by introducing special additives (compatibilizers), forming chemical and/or donor-acceptor bonds with the components of the mixture [2-6].We know [7] that chelates of many metals are capable of strong specific interaction with compounds containing electron-donor groups. They act as centers for complexation ("coordination" crosslinking nodes), leading to local structurization of the polymer. By "local change in structure," we mean an increase in concentration of some functional groups of the polymer near the metal chelate. The type of functional groups of the polymer matrix forming complexes with a coordination compound with a chelate structure depends significantly on their electron-donor ability and on the electronic configuration of the central metal ion [8][9][10].Metal chelates are often catalysts for the formation of one of the components of the selected mixtures [7], and so introducing them can also have an appreciable effect on the kinetics for the formation of such systems. Bearing in mind the 0040-5760/06/4206-0357

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Section: Characteristics Of the Kinetics Of Formation Of Semi-ipns Insupporting

confidence: 54%

Section: Characteristics Of the Kinetics Of Formation Of Semi-ipns Inmentioning

confidence: 99%

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Kinetics of formation of a linear polymer-polymer network system in the presence of 3d metal chelates

et al. 2006

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“…For this investigation, we have chosen semi‐IPNs based on crosslinked polyurethane (PUs) and poly(butyl methacrylate)14 taken in the ratio 75/25 by mass. Semi‐IPNs were prepared by simultaneous formation of crosslinked PU and radical polymerization of butyl methacrylate.…”

Section: Methodsmentioning

confidence: 99%

“…One can suppose that ageing in blends and IPNs is related to incomplete phase separation in the system. Physical ageing in polymer blends and segmented polyurethanes has previously been investigated 13. Such systems are of great interest from both theoretical and practical points of view.…”

Section: Introductionmentioning

confidence: 99%

Effect of physical ageing on the viscoelasticity of interpenetrating polymer networks

et al. 2000

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Viscoelastic Properties of Interpenetrating Polymer Networks

Goswami

2016

Micro‐ and Nano‐structured Interpenetrating Polymer Networks

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Effect of compatibilizing compounds on the viscoelastic properties of interpenetrating polymer networks

Cited by 11 publications

References 12 publications

Kinetics of formation of a linear polymer-polymer network system in the presence of 3d metal chelates

Kinetics of formation of a linear polymer-polymer network system in the presence of 3d metal chelates

Effect of physical ageing on the viscoelasticity of interpenetrating polymer networks

Viscoelastic Properties of Interpenetrating Polymer Networks

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