An experimental appraisal of the Cox–Merz rule and Laun's rule based on bidisperse entangled polystyrene solutions

Wen, Yu; Lin, Hui; Li, Chang H.; Hua, Chi C.

doi:10.1016/j.polymer.2004.10.012

Cited by 33 publications

(23 citation statements)

References 12 publications

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“…The surface tension (γ), and conductivity (κ) of the prepared solutions were measured using Face surface tension meter (CBVP‐A3), and Consort conductivity meter (C832), respectively. The viscoelastic properties of the solutions were measured in a strain‐controlled rheometer (ARES, TA Instruments) using a cup‐and‐bar feature at room temperature 35. The oscillatory shear mode was used to determine the storage modulus G ′(ω) and loss modulus G ″(ω) over a range of frequencies, ω, at room temperature.…”

Section: Methodsmentioning

confidence: 99%

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Morphology, microstructure, and electrical properties of poly(D,L‐lactic acid)/carbon nanocapsule composite nanofibers

Chien

Wang

2012

J of Applied Polymer Sci

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The morphologies and properties of poly(D,L-lactic acid)/carbon nanocapsule (CNCs) electrospun fiber mats were studied.To determine the effect of filler, a solution without sufficient entanglement density was used. The rheological results showed that the solution entanglement density was enhanced by the addition of filler, which led to the formation of network between the polymer chains and filler particles. The findings can be used for further exploration of electrospinning in semidilute solutions. The electrical conductivities of electrospun fiber mats and cast films were determined and fitted using the percolation theory. When the CNC content was above the critical percolation concentration, a master curve was obtained provided that the conductivity curves were normalized with the level of percolation network. The porosity effect was investigated. In addition, the microstructure of as-spun composite fiber was examined in detail. V C 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 128: 958-969, 2013

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Section: Methodsmentioning

confidence: 99%

“…The oscillatory shear mode was used to determine the storage modulus G ′(ω) and loss modulus G ″(ω) over a range of frequencies, ω, at room temperature. The solution complex viscosity (η*) was derived from the dynamic properties using:35 [( G ′/ω) 2 + ( G″ /ω) 2 ] 0.5 .…”

Section: Methodsmentioning

confidence: 99%

Morphology, microstructure, and electrical properties of poly(D,L‐lactic acid)/carbon nanocapsule composite nanofibers

Chien

Wang

2012

J of Applied Polymer Sci

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“…Both rules by Cox and Laun were analysed by Wen et al (2004) at low shear rates (up to Hz). It was demonstrated that the rules are valid in the shear rate range ( s -1 ), thought deviation from the measured steady state shear rate begins at the higher frequency.…”

Section: Effect Of Polymer Concentration and Excitation Frequencymentioning

confidence: 99%

Development of an Ultrasonic Sensing Technique to Measure Lubricant Viscosity in Engine Journal Bearing In-Situ

Schirru

2017

Springer Theses

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“…η 0 was determined as the viscosity at 0.0628 rad/s. The two polymers both have a narrow molecular weight distribution and are linear; thus, the Cox‐Merz rule is assumed valid and applied 36…”

Section: Methodsmentioning

confidence: 99%

Investigation on high strength laser welds of polypropylene and high‐density polyethylene

Juhl

Christiansen

Jensen

2013

J of Applied Polymer Sci

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Mechanical strength in polymer weld interfaces in semi‐crystalline high density polyethylene (HDPE) and polypropylene (PP) is investigated. The welding method investigated is through transmission laser welding (TTLW). Utilizing the TTLW process with 0.4 wt % carbon black as absorber, a lap‐joint is formed which is tested for mechanical properties using an Instron tensile testing machine. In contrast to earlier investigations, the tensile tests conclude that 89% of the strength of a HDPE/HDPE weld was developed in a PP/HDPE weld with HDPE as the absorbing part. This high weld strength is explained from: (1) a relatively low reptation time being in the millisecond range for both HDPE and PP; (2) a polymer mesh size (tube diameter (a)) being similar to the equilibrium interpenetration depth, determined from Helfand's theory and the interaction parameter (χ); (3) The selected HDPE and PP were both metallocene catalyzed and constituted a similar crystallization temperature which is required for high crystallinity in/near the interface. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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An experimental appraisal of the Cox–Merz rule and Laun's rule based on bidisperse entangled polystyrene solutions

Cited by 33 publications

References 12 publications

Morphology, microstructure, and electrical properties of poly(D,L‐lactic acid)/carbon nanocapsule composite nanofibers

Morphology, microstructure, and electrical properties of poly(D,L‐lactic acid)/carbon nanocapsule composite nanofibers

Development of an Ultrasonic Sensing Technique to Measure Lubricant Viscosity in Engine Journal Bearing In-Situ

Investigation on high strength laser welds of polypropylene and high‐density polyethylene

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