Effect of physical ageing on the viscoelasticity of interpenetrating polymer networks

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

doi:10.1002/(sici)1097-0126(200004)49:4<334::aid-pi371>3.0.co;2-q

Cited by 5 publications

(3 citation statements)

References 13 publications

(11 reference statements)

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“…Generally, the structures and the properties of the polymeric materials are related to the molecular weight of the components [12]. However, little attention has been paid to the relation of molecular weight in IPN to the structure and properties of the materials [13,14]. So in the present work, a series of BaTiO 3 filled and unfilled interpenetrating polymer networks (IPN), gradient IPN composed of poly(ethylene glycol urethane) (PEGPU) and unsaturated polyester resin (UP) with different molecular weight of PU were prepared.…”

Section: Introductionmentioning

confidence: 99%

The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO3 Filled IPN

Guo¹,

Tang²,

Wang³

2012

MSA

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Interpenetrating polymer network (IPN), gradient IPN and BaTiO3 filled IPN, composed of poly(ethylene glycol urethane) (PEGPU) and unsaturated polyester resin (UP) curing at room temperatures were prepared. Then the effect of soft/hard segment ratio in polyurethane (PU), component ratio of PU to UP in IPN, adding amount of BaTiO3 in filled IPN, the component sequences and interval times between each IPN for gradient IPN, on morphology and mechanical behavior of IPN and BaTiO3/IPN nanocomposites with different molecular weight of PU were studied systematically. Moreover, the investigation on the relationship between the morphologies and the mechanical properties indicated that the IPN with finer morphology exhibited an excellent consistency of the higher strengths and elongations

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Section: Introductionmentioning

confidence: 99%

The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO3 Filled IPN

Guo¹,

Tang²,

Wang³

2012

MSA

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“…IPNs in which one of the component is hydrophobous and the other is hydrophylic produces an alternating microdomain structure that shows excellent antithrombogenic properties, and blood compatibility of the resulting materials is enhanced [16]. Some particular features of glass transition and structural relaxation process are shown by phase separated IPNs [17,18].…”

Section: Introductionmentioning

confidence: 99%

Main dielectric relaxation of poly(methyl acrylate)–polystyrene interpenetrating polymer networks

Dueñas

Ribelles

2005

Journal of Non-Crystalline Solids

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“…Thus, in manganese containing segmented poly urethanes, the redistribution of coordination bonds occurs during physical aging [21]. For compatible blends of atactic poly(methyl methacrylate) and sta tistical styrene-acrylonitrile copolymers, the rate of volume relaxation depends on the aging temperature and blend composition [22].For heterogeneous systems, such as interpenetrat ing polymer networks (IPNs), physical aging pro cesses possess their own specifics related to phase sep aration; that is, they occur independently in each phase and have different times [23][24][25]. As was shown in [25], during aging of semi interpenetrating polymer networks (semi IPNs) based on network PU and lin ear PS, there are structural and phase transformations that are related to an increase in the amount of topo logical entanglements in the system due to of fluctua tions of polymer chains and redistribution of segmen tal mobility with a change in the rate of relaxation pro cesses of each phase.…”

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confidence: 99%

Structural changes in blends of linear polymers during their physical aging

et al. 2012

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125Aging of polymers is a combination of physical and chemical processes occurring during storage, process ing, and exploitation of polymeric materials and resulting in a change in their properties [1]. Depend ing on which processes prevail, chemical and physical aging of polymers can be distinguished. Under the action of oxygen, ozone, high temperature, light, pen etrating radiation, mechanical stress, etc., degradation processes may occur in polymers; they entail decom position of polymer chains and lead to formation of low molecular mass products. The improvement of known polymers and the creation of polymeric mate rials with new valuable properties are based on achievements in the chemical physics of aging and sta bilization of polymers [2,3]. However, owing to the thermodynamically nonequilibrium structure of poly mers (even in the absence of chemical transforma tions), relaxation processes occur in them; as a result, the polymers tend toward the state close to equilib rium. This process is referred to as "physical aging" [4] and is accompanied by change in local supramolecular structures [5]. Various factors responsible for aging of materials act both individually and jointly [6].Investigations of physical aging have been per formed for a very large amount of amorphous and semicrystalline polymers, and the main publications in this field concern the study of their nonequilibrium glassy states [7][8][9][10][11][12][13][14][15][16][17]. It is shown that the time and ther mal prehistory strongly affect the physical aging of polymeric materials [3,13,18,19]. Evidently, almost all composite materials are subjected to aging; how ever, little is known about the effect of physical aging on the properties of multicomponent heterogeneous systems. For example, it has been found that the pres ence of a filler in the polyvinylbutyral matrix during aging may initiate crosslinking processes in the system [20]. Thus, in manganese containing segmented poly urethanes, the redistribution of coordination bonds occurs during physical aging [21]. For compatible blends of atactic poly(methyl methacrylate) and sta tistical styrene-acrylonitrile copolymers, the rate of volume relaxation depends on the aging temperature and blend composition [22].For heterogeneous systems, such as interpenetrat ing polymer networks (IPNs), physical aging pro cesses possess their own specifics related to phase sep aration; that is, they occur independently in each phase and have different times [23][24][25]. As was shown in [25], during aging of semi interpenetrating polymer networks (semi IPNs) based on network PU and lin ear PS, there are structural and phase transformations that are related to an increase in the amount of topo logical entanglements in the system due to of fluctua tions of polymer chains and redistribution of segmen tal mobility with a change in the rate of relaxation pro cesses of each phase. Since the main factors of physical aging are by determined by relaxation pro cesses occurring in the system, which in turn depend on its str...

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Effect of physical ageing on the viscoelasticity of interpenetrating polymer networks

Cited by 5 publications

References 13 publications

The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO<sub>3</sub> Filled IPN

The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO<sub>3</sub> Filled IPN

Main dielectric relaxation of poly(methyl acrylate)–polystyrene interpenetrating polymer networks

Structural changes in blends of linear polymers during their physical aging

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Effect of physical ageing on the viscoelasticity of interpenetrating polymer networks

Cited by 5 publications

References 13 publications

The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO&lt;sub&gt;3&lt;/sub&gt; Filled IPN

The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO&lt;sub&gt;3&lt;/sub&gt; Filled IPN

Main dielectric relaxation of poly(methyl acrylate)–polystyrene interpenetrating polymer networks

Structural changes in blends of linear polymers during their physical aging

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The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO<sub>3</sub> Filled IPN

The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO<sub>3</sub> Filled IPN