Mechanical behavior of glassy polyethylene terephthalate deformed in liquid adsorption active media

Волынский, А. Л.; Aleskerov, A.G.; Grokhovskaya, T.Ye.; Bakeyev, N.F.

doi:10.1016/0032-3950(76)90122-2

Cited by 20 publications

(2 citation statements)

References 4 publications

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“…The fracture mechanism that is induced in the demonstrated method is similar to the one that occurs naturally during environmental stress cracking (ESC), for which a polymer experiences crack propagation under stress while drawing in a surround liquid deeper into the material. This type of chemical influenced deformation was studied earlier by Bernier and Kambour, and later adopted for practical uses by Volynskii et al , and Rozanski et al Both of the latter research groups showed that samples subjected to tensile deformation in a liquid media, formed a large number of submicron crazes that percolated through the polymer film. Subsequent studies by Rozanski et al reported on the significance of crystallinity on the network of crazes by this procedure .…”

Section: Introductionmentioning

confidence: 97%

Developing Continuous Submicron-Scale Conductive Interpenetrating Hydrogel Network in Polyethylene Matrices through Controlled Crazing and Polymerization

Kornberg

Thompson

Zhu

2020

Ind. Eng. Chem. Res.

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An approach is described for the synthesis of controlled submicron interpenetrating networks with distinct functional features in commodity polymers, based on a mechanism of crazing and polymerization. In this work, ion conductivity was introduced into polyethylene with only minor losses in its mechanical properties, using a highly branched acrylic hydrogel. Control over the porous network developed in the matrix was gained by the addition of a crystallizing nucleating agent, which was used to increase the number and reduce the size of crystallites. Variation of experimental conditions, such as the degree of elongation and applied reaction pressure, produced different morphologies and conductivities for the co-continuous alloy. The samples were deformed in a liquid medium that possessed an affinity for the matrix material and acted both as a surface-active agent for the crazing and as a reactant for the conductive phase. Without pressure, deforming by 100% strain yielded a conductivity of 5.67 × 10 −7 S•cm −1 for the polymer specimen. Simultaneously increasing the system pressure while constantly straining a specimen enabled further enhancement in conductivity. As a particular example, elongation of 100% and applied pressure up to 2.76 MPa ensured conductivity nearly equal to that of the pure hydrogel at 4.43 × 10 −4 S•cm −1 .

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Section: Introductionmentioning

confidence: 97%

Developing Continuous Submicron-Scale Conductive Interpenetrating Hydrogel Network in Polyethylene Matrices through Controlled Crazing and Polymerization

Kornberg

Thompson

Zhu

2020

Ind. Eng. Chem. Res.

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“…The described alternative approach above is based on the mechanism of crazing in polymers in the presence of liquids, similar to the damaging phenomenon that occurs naturally during part service via environmental stress cracking (ESC). , In our previous research, we extended the approach of Volynskii et al , and Rozanski and Galeski by adjusting the experimental parameters. For our purposes of developing a functional cross-linked network within a polyethylene matrix, we included a post-polymerization of the surrounding liquid in which the matrices were stretched.…”

Section: Introductionmentioning

confidence: 99%

Flexible Conductive Substrate Incorporating a Submicrometer Co-continuous Polyaniline Phase within Polyethylene by Controlled Crazing

Kornberg

Thompson

Zhu

2021

ACS Appl. Polym. Mater.

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A polyethylene film with an incorporated nanodispersed polyaniline conductive network was developed by controlled crazing in a high-pressure reactor while immersed in an emulsified medium of aniline in chloroform. The resulting conductive material exhibited an average through-plane electron conductivity of 2 × 10–2 S·cm–1, within an order of magnitude of brittle doped polyaniline (1.2 × 10–1 S·cm–1), yet retained the ductility of the polyethylene matrix. It was also shown that 90% of the original conductivity was retained after 1% elongation. Embedded polyaniline fibers acted both as a nucleating agent to reduce the size of crystallites for controlled crazing and as submicrometer conductive nodes, connecting neighboring conductive conduits formed inside the crazing voids, with both effects contributing to the increasing electrical permeability of the secondary phase. For comparison, montmorillonite and TiO2 particles were tested as alternative nucleating agents to verify the effect of the preliminary embedded polyaniline fibers on the matrix morphology and, consequently, the conductivity acquired.

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Advances in Polymer Physics

1977

Polymer Science U.S.S.R.

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Mechanical behavior of glassy polyethylene terephthalate deformed in liquid adsorption active media

Cited by 20 publications

References 4 publications

Developing Continuous Submicron-Scale Conductive Interpenetrating Hydrogel Network in Polyethylene Matrices through Controlled Crazing and Polymerization

Developing Continuous Submicron-Scale Conductive Interpenetrating Hydrogel Network in Polyethylene Matrices through Controlled Crazing and Polymerization

Flexible Conductive Substrate Incorporating a Submicrometer Co-continuous Polyaniline Phase within Polyethylene by Controlled Crazing

Advances in Polymer Physics

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