A new slit‐radial die for simultaneously measuring steady state shear viscosity and first normal stress difference of viscoelastic liquids via capillary rheometry
A new slit‐radial die capable of simultaneously obtaining steady state shear viscosity ηγ̇ and the average first normal stress difference coefficient Ψ1γ̇ via capillary rheometry has been developed. The steady state shear viscosity ηγ̇ and average first normal stress difference coefficient Ψ1γ̇ are...
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| Veröffentlicht in: | Journal of applied polymer science 2022-05, Vol.139 (18), p.n/a |
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| container_title | Journal of applied polymer science |
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| creator | Khabazian Esfahani, Masood Georgantopoulos, Christos K. Naue, Ingo F. C. Sunder, Joachim Wilhelm, Manfred |
| description | A new slit‐radial die capable of simultaneously obtaining steady state shear viscosity ηγ̇ and the average first normal stress difference coefficient Ψ1γ̇ via capillary rheometry has been developed. The steady state shear viscosity ηγ̇ and average first normal stress difference coefficient Ψ1γ̇ are calculated in the slit part and radial part of the die, respectively. The steady state shear viscosity ηγ̇ from the slit part of the slit‐radial die is compared to shear viscosities ηγ̇ obtained from a capillary die and also the magnitude of the complex viscosity η*ω obtained from oscillatory shear experiment. The average value of first normal stress difference coefficient Ψ1γ̇ which is calculated in the radial part of the slit‐radial die is compared to first normal stress difference coefficient Ψ1γ̇ obtained from transient shear experiment in a cone‐plate geometry and the molecular stress function model predictions. The effect of variation of power law fitting parameters (consistency index, k and power law index, n) on average value of the first normal stress difference coefficient Ψ1γ̇ obtained from the radial part of the slit‐radial die is discussed. As this die has the shape of the city map of Karlsruhe it is named as Karlsruhe die. |
| doi_str_mv | 10.1002/app.52094 |
| format | Article |
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C. ; Sunder, Joachim ; Wilhelm, Manfred</creator><creatorcontrib>Khabazian Esfahani, Masood ; Georgantopoulos, Christos K. ; Naue, Ingo F. C. ; Sunder, Joachim ; Wilhelm, Manfred</creatorcontrib><description>A new slit‐radial die capable of simultaneously obtaining steady state shear viscosity ηγ̇ and the average first normal stress difference coefficient Ψ1γ̇ via capillary rheometry has been developed. The steady state shear viscosity ηγ̇ and average first normal stress difference coefficient Ψ1γ̇ are calculated in the slit part and radial part of the die, respectively. The steady state shear viscosity ηγ̇ from the slit part of the slit‐radial die is compared to shear viscosities ηγ̇ obtained from a capillary die and also the magnitude of the complex viscosity η*ω obtained from oscillatory shear experiment. The average value of first normal stress difference coefficient Ψ1γ̇ which is calculated in the radial part of the slit‐radial die is compared to first normal stress difference coefficient Ψ1γ̇ obtained from transient shear experiment in a cone‐plate geometry and the molecular stress function model predictions. The effect of variation of power law fitting parameters (consistency index, k and power law index, n) on average value of the first normal stress difference coefficient Ψ1γ̇ obtained from the radial part of the slit‐radial die is discussed. 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C.</creatorcontrib><creatorcontrib>Sunder, Joachim</creatorcontrib><creatorcontrib>Wilhelm, Manfred</creatorcontrib><title>A new slit‐radial die for simultaneously measuring steady state shear viscosity and first normal stress difference of viscoelastic liquids via capillary rheometry</title><title>Journal of applied polymer science</title><description>A new slit‐radial die capable of simultaneously obtaining steady state shear viscosity ηγ̇ and the average first normal stress difference coefficient Ψ1γ̇ via capillary rheometry has been developed. The steady state shear viscosity ηγ̇ and average first normal stress difference coefficient Ψ1γ̇ are calculated in the slit part and radial part of the die, respectively. The steady state shear viscosity ηγ̇ from the slit part of the slit‐radial die is compared to shear viscosities ηγ̇ obtained from a capillary die and also the magnitude of the complex viscosity η*ω obtained from oscillatory shear experiment. The average value of first normal stress difference coefficient Ψ1γ̇ which is calculated in the radial part of the slit‐radial die is compared to first normal stress difference coefficient Ψ1γ̇ obtained from transient shear experiment in a cone‐plate geometry and the molecular stress function model predictions. The effect of variation of power law fitting parameters (consistency index, k and power law index, n) on average value of the first normal stress difference coefficient Ψ1γ̇ obtained from the radial part of the slit‐radial die is discussed. As this die has the shape of the city map of Karlsruhe it is named as Karlsruhe die.</description><subject>Coefficients</subject><subject>extrusion</subject><subject>manufacturing</subject><subject>Materials science</subject><subject>Normal stress</subject><subject>Polymers</subject><subject>Power law</subject><subject>rheology</subject><subject>Rheometry</subject><subject>Shear viscosity</subject><subject>Steady state</subject><subject>Stress functions</subject><subject>Viscoelastic liquids</subject><subject>Viscosity</subject><issn>0021-8995</issn><issn>1097-4628</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><recordid>eNp1kc1u1TAQhS0EEpfCom9giRWLtP7Jz83yqgKKVKldwDqaa49bV06cehyq7PoIPARPxpPUJWxZjTTzzZk5OoydSnEmhVDnMM9njRJ9_YrtpOi7qm7V_jXblZms9n3fvGXviO6FkLIR7Y79PvAJHzkFn_88_UpgPQRuPXIXEyc_LiHDhHGhsPIRgZbkp1tOGcGupUBGTncIif_0ZCL5vHKYLHc-UeZTTGORo5yQqKg6hwkngzy6jccAlL3hwT8s3lJpAjcw-xAgrTzdYRwxp_U9e-MgEH74V0_Yjy-fv19cVlfXX79dHK4qo7Wqqw6c1c5II92xBlnMdk2x36IqxgUK1NqhdPLojk0ntLLG2R4s7rGVWplGn7CPm-6c4sOClIf7uKSpnBxUq-taqk6_UJ82yqRIlNANc_JjeXiQYngJYSghDH9DKOz5xj76gOv_weFwc7NtPAN2gY7O</recordid><startdate>20220510</startdate><enddate>20220510</enddate><creator>Khabazian Esfahani, Masood</creator><creator>Georgantopoulos, Christos K.</creator><creator>Naue, Ingo F. 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C. ; Sunder, Joachim ; Wilhelm, Manfred</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3324-7afd3fc1c1fb4a1995754626e28990e0e33fe1f1bfb57032dcfd9ade8e6132c53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Coefficients</topic><topic>extrusion</topic><topic>manufacturing</topic><topic>Materials science</topic><topic>Normal stress</topic><topic>Polymers</topic><topic>Power law</topic><topic>rheology</topic><topic>Rheometry</topic><topic>Shear viscosity</topic><topic>Steady state</topic><topic>Stress functions</topic><topic>Viscoelastic liquids</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Khabazian Esfahani, Masood</creatorcontrib><creatorcontrib>Georgantopoulos, Christos K.</creatorcontrib><creatorcontrib>Naue, Ingo F. C.</creatorcontrib><creatorcontrib>Sunder, Joachim</creatorcontrib><creatorcontrib>Wilhelm, Manfred</creatorcontrib><collection>Wiley Online Library Open Access</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of applied polymer science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Khabazian Esfahani, Masood</au><au>Georgantopoulos, Christos K.</au><au>Naue, Ingo F. C.</au><au>Sunder, Joachim</au><au>Wilhelm, Manfred</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A new slit‐radial die for simultaneously measuring steady state shear viscosity and first normal stress difference of viscoelastic liquids via capillary rheometry</atitle><jtitle>Journal of applied polymer science</jtitle><date>2022-05-10</date><risdate>2022</risdate><volume>139</volume><issue>18</issue><epage>n/a</epage><issn>0021-8995</issn><eissn>1097-4628</eissn><abstract>A new slit‐radial die capable of simultaneously obtaining steady state shear viscosity ηγ̇ and the average first normal stress difference coefficient Ψ1γ̇ via capillary rheometry has been developed. The steady state shear viscosity ηγ̇ and average first normal stress difference coefficient Ψ1γ̇ are calculated in the slit part and radial part of the die, respectively. The steady state shear viscosity ηγ̇ from the slit part of the slit‐radial die is compared to shear viscosities ηγ̇ obtained from a capillary die and also the magnitude of the complex viscosity η*ω obtained from oscillatory shear experiment. The average value of first normal stress difference coefficient Ψ1γ̇ which is calculated in the radial part of the slit‐radial die is compared to first normal stress difference coefficient Ψ1γ̇ obtained from transient shear experiment in a cone‐plate geometry and the molecular stress function model predictions. The effect of variation of power law fitting parameters (consistency index, k and power law index, n) on average value of the first normal stress difference coefficient Ψ1γ̇ obtained from the radial part of the slit‐radial die is discussed. As this die has the shape of the city map of Karlsruhe it is named as Karlsruhe die.</abstract><cop>Hoboken, USA</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/app.52094</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0003-0947-4010</orcidid><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Coefficients extrusion manufacturing Materials science Normal stress Polymers Power law rheology Rheometry Shear viscosity Steady state Stress functions Viscoelastic liquids Viscosity |
| title | A new slit‐radial die for simultaneously measuring steady state shear viscosity and first normal stress difference of viscoelastic liquids via capillary rheometry |
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