Poly(norbornene): Tensile and dynamic‐mechanical properties

Galperin, I.; Carter, J. H.; Hein, Paulo Ricardo Gherardi

doi:10.1002/app.1968.070120722

Cited by 11 publications

(10 citation statements)

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“…From Figure 7 and Table II, what stands out is the fact that for low BaSO 4 concentration at 10 wt %, the filled PEBA compound has the sharpest loss tangent at the T gr transition, and both the T gf and T gr glass transitions are reduced to the lowest when compared with these of pure resin and other filled compounds. These facts imply that the PEBA compound filled with 10 wt % BaSO 4 has the highest damping ability resultant from the filler‐expanded free volume, thus utmostly enhancing the postyield material extensibility and ductility of the PEBA copolymer,39–41 as observed in Uniaxial tensile properties section. For other PEBA compounds with low BaSO 4 concentrations, say 20 and 29 wt %, the similar observations can be marginally made, except that the T gr glass transition (at ca.…”

Section: Resultsmentioning

confidence: 87%

Radiopaque, barium sulfate‐filled biomedical compounds of a poly(ether‐block‐amide) copolymer

Guo

2008

J of Applied Polymer Sci

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Various radiopaque compounds of a poly (ether‐block‐amide) copolymer resin filled with fine barium sulfate particles were prepared by melt mixing. Material properties of the filled compounds were investigated using various material characterization techniques, including thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic rheometry, uniaxial tensile test, and dynamic mechanical thermal analysis (DMTA). The effects of the filler and its concentration on the measured material properties are evaluated. It has been found that in addition to its well‐known X‐ray radiopacity, the filler is quite effective in reinforcing some mechanical properties of the copolymer, including modulus of elasticity and yield strength. More interestingly, it has been observed that at low loading concentrations near 10 wt %, the filler may also act as a rigid, inorganic toughener for the copolymer by improving the postyield material extensibility of strain hardening against ultimate material fracture. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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Section: Resultsmentioning

confidence: 87%

Radiopaque, barium sulfate‐filled biomedical compounds of a poly(ether‐block‐amide) copolymer

Guo

2008

J of Applied Polymer Sci

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“…145 Galperin et al . 158 found that the tensile strength and extensibility of PNB increased, while Young's modulus decreased with increasing molecular weight and with increasing content of trans relative to cis unsaturation. Matsumoto et al 159 investigated the physical/mechanical properties of poly(5-norbornene-2-nitrile) (PNB-CN) and found that PNB-CN has good tensile and flexural properties, high creep resistance, and high abrasion resistance that are comparable with those of engineering plastics.…”

Section: Effect Of Specific Interactions On Rheological Propertiesmentioning

confidence: 94%

Rheology of Miscible Polymer Blends with Hydrogen Bonding

Yang

2008

Macromolecules

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Poly(4-vinylphenol) (PVPh) was blended with four different polymers: poly(vinyl methyl ether) (PVME), poly(vinyl acetate) (PVAc), poly(2-vinylpyridine) (P2VP), and poly(4-vinylpyridine) (P4VP) by solvent casting. The miscibility of these four PVPhbased blend systems was investigated using differential scanning calorimetry (DSC) and the composition-dependent glass transition temperature (T g) was predicted by a thermodynamic theory. The hydrogen bonds between phenolic group in PVPh and ether group, carbonyl group or pyridine group was confirmed by Fourier transform infrared (FTIR) spectroscopy. The fraction of hydrogen bonds was calculated by the Coleman-Graf-Painter association model. Linear dynamic viscoelasticity of four PVPh-based miscible polymer blends with hydrogen bonding was investigated. Emphasis was placed on investigating how the linear dynamic viscoelasticity of miscible polymer blends with specific interaction might be different from that of miscible polymer blends without specific interaction. We have found that an application of time-temperature superposition (TTS) to the PVPh-based miscible blends with intermolecular hydrogen bonding is warranted even when the difference in the component glass transition temperatures is as large as about 200 °C, while TTS fails for miscible polymer blends without specific interactions. On the basis of such an observation, we have concluded that hydrogen bonding suppressed concentration fluctuations in PVPh-based miscible blends. It has been found that both the intra-association (self-association

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“…Accordingly, we conclude simply that the molecules closer to the surface nearest the light source more readily isomerize than those deeper in the film and further from the light source, and that the molecular volume change is positive. Following a procedure developed by van Oosten,20 the work per unit volume ( W ) performed by the proximal or front face of the film (irradiated side) on the distal or rear face of the film can be determined simply from W = ${1 \over 4}$ (Δ ϵ ) 2 E , where Δ ϵ is the differential strain from proximal and distal faces of the film and E is the average elastic or Young's modulus of polynorbornene (2 × 10 8 dynes cm −2 ) 21. The differential strain (Δ ϵ ) is the ratio of h / r , where h is the thickness of the film and r is the radius of a circle formed from the deformation.…”

Section: Molar Ratio Of Ruthenium Monomer To Norbornene Monomer Dimementioning

confidence: 99%

Bending Materials with Light: Photoreversible Macroscopic Deformations in a Disordered Polymer

2011

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An amorphous co‐polymer formed from norbornene and a photochromic ruthenium sulfoxide complex shows reversible macroscopic deformations when irradiated. Charge‐transfer excitation of the sulfur‐bonded isomer leads to isomerization and a macroscopic bending of the film. Charge‐transfer excitation of the oxygen‐bonded isomer reverses the bending. The macroscopic bending is ascribed to the molecular isomerization.

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Poly(norbornene): Tensile and dynamic‐mechanical properties

Cited by 11 publications

References 1 publication

Radiopaque, barium sulfate‐filled biomedical compounds of a poly(ether‐block‐amide) copolymer

Radiopaque, barium sulfate‐filled biomedical compounds of a poly(ether‐block‐amide) copolymer

Rheology of Miscible Polymer Blends with Hydrogen Bonding

Bending Materials with Light: Photoreversible Macroscopic Deformations in a Disordered Polymer

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