Rheological characterization of commercial glass mat thermoplastics (GMTs) by squeeze flow testing

Rheology studies the deformation and flow of matter and seeks to describe the deformations of material depending on the time they are exposed to mechanical actions. This paper proposes to understand the behavior of fresh mortar adhesives in Squeeze Flow tests based on rheological characterization of different commercial compositions. In the tests, flow of material results from the application of a compressive load on the sample in the fresh state which causes displacement due to stresses generated during radial shear flow. We performed further physical characterizations of mortars and viscosity on material passing the through a sieve with a 0.075 mm sieve opening with the objective of basing the analysis of the results obtained from Squeeze Flow tests. It was observed that the mortars studied showed differences in rheological behavior, probably resulting from synergistic action of some of the composition parameters, especially the particle size distribution and particle morphology.

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Rheological characterization of poly(ethylene oxide) aqueous solution under dynamic helical squeeze flow

Korea-Australia Rheology Journal ◽

10.1007/s13367-012-0033-y ◽

2012 ◽

Vol 24 (4) ◽

pp. 267-275 ◽

Cited By ~ 1

Author(s):

Jae Hee Kim ◽

Kyung Hyun Ahn

Keyword(s):

Aqueous Solution ◽

Ethylene Oxide ◽

Squeeze Flow ◽

Rheological Characterization ◽

Poly Ethylene Oxide ◽

Poly Ethylene

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Rheological characterization of asphalt in a temperature-gradient combinatorial squeeze-flow setup

Rheologica Acta ◽

10.1007/s00397-007-0196-5 ◽

2007 ◽

Vol 46 (8) ◽

pp. 1075-1082 ◽

Cited By ~ 1

Author(s):

Yatin P. Patil ◽

Antonio Senador ◽

Patrick T. Mather ◽

Montgomery T. Shaw

Keyword(s):

Temperature Gradient ◽

Squeeze Flow ◽

Rheological Characterization

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Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag

Materials ◽

10.3390/ma14082069 ◽

2021 ◽

Vol 14 (8) ◽

pp. 2069

Author(s):

Markssuel Teixeira Marvila ◽

Afonso Rangel Garcez de Azevedo ◽

Paulo Ricardo de Matos ◽

Sérgio Neves Monteiro ◽

Carlos Maurício Fontes Vieira

Keyword(s):

Blast Furnace ◽

Blast Furnace Slag ◽

Water Retention ◽

Mass Density ◽

Sodium Content ◽

Squeeze Flow ◽

Rheological Characterization ◽

Hardened State ◽

Furnace Slag

The fresh and rheological properties of alkali mortars activated by blast furnace slag (BFS) were investigated. Consistency tests, squeeze flow, dropping ball, mass density in the hardened state, incorporated air, and water retention were performed. Mortars were produced with the ratio 1:2:0.45 (binder:sand:water), using not only ordinary Portland cement for control but also BFS, varying the sodium content of the activated alkali mortars from 2.5 to 15%. The results obtained permitted understanding that mortars containing 2.5 to 7.5% sodium present a rheological behavior similar to cementitious mortars by the Bingham model. In turn, the activated alkali mortars containing 10 to 15% sodium showed a very significant change in the properties of dynamic viscosity, which is associated with a change in the type of model, starting to behave similar to the Herschel–Bulkley model. Evaluating the properties of incorporated air and water retention, it appears that mortars containing 12.5% and 15% sodium do not have compatible properties, which is related to the occupation of sodium ions in the interstices of the material. Thus, it is concluded that the techniques used were consistent in the rheological characterization of activated alkali mortars.

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Squeeze Flow Rheometry for Rheological Characterization of Energetic Formulations

Journal of Energetic Materials ◽

10.1080/07370650600791148 ◽

2006 ◽

Vol 24 (3) ◽

pp. 195-212 ◽

Cited By ~ 6

Author(s):

D.M. Kalyon ◽

H.S. Tang ◽

B. Karuv

Keyword(s):

Squeeze Flow ◽

Rheological Characterization

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Rheological characterization of tack and viscoelasticity of compositions of crepe coating used in the Yankee dryer

TAPPI Journal ◽

10.32964/tj18.11.641 ◽

2019 ◽

Vol 18 (11) ◽

pp. 641-649

Author(s):

JOSHUA OMAMBALA ◽

CARL MCINTYRE

Keyword(s):

Normal Force ◽

Weight Ratio ◽

Good Combination ◽

Rheological Characterization ◽

Nonlinear Viscoelastic ◽

Coating Composition ◽

Linear And Nonlinear ◽

Work Done ◽

Tissue Production

The vast majority of tissue production uses creping to achieve the required set of properties on the base sheet. The Yankee coating helps to develop the desired crepe that in turn determines properties such as bulk and softness. The adhesion of the sheet to the Yankee surface is a very important characteristic to consider in achieving the desired crepe. The coating mix usually consists of the adhesive, modifier, and release. A good combination of these components is essential to achieving the desired properties of the tissue or towel, which often are determined by trials on the machine that can be time consuming and lead to costly rejects. In this paper, five compositions of an industrial Yankee coating adhesive, modifier, and release were examined rheologically. The weight ratio of the adhesive was kept constant at 30% in all five compositions and the modifier and release ratios were varied. The normal force and work done by the different compositions have been shown at various temperatures simulating that of the Yankee surface, and the oscillatory test was carried out to explain the linear and nonlinear viscoelastic characteristic of the optimal coating composition.

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