Dependence of the zero shear-rate viscosity and the viscosity function of linear high- density polyethylenes on the mass-average molar mass and polydispersity
Linear high-density polyethylenes with molar masses Mw between 240 and 1,000,000 g/mol, obtained by metallocene catalysts, were characterized in shear using oscillatory and creep tests. The polydispersities of the molar mass distributions (MMDs) lay between 1 and 16. The resulting zero shear-rate vi...
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| Veröffentlicht in: | Rheologica acta 2006-06, Vol.45 (5), p.755-764 |
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| container_title | Rheologica acta |
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| creator | STADLER, Florian J PIEL, Christian KASCHTA, Joachim RULHOFF, Sascha KAMINSKY, Walter MUNSTEDT, Helmut |
| description | Linear high-density polyethylenes with molar masses Mw between 240 and 1,000,000 g/mol, obtained by metallocene catalysts, were characterized in shear using oscillatory and creep tests. The polydispersities of the molar mass distributions (MMDs) lay between 1 and 16. The resulting zero shear-rate viscosities η0 covered a range from 2.5×10−3 to around 108 Pas. Above a critical molar mass of Mc≈2,900 g/mol, the experimental results can be described by the relation η0 ∼ Mw3.6, independently of the MMD. The oscillatory data were fitted with a Carreau–Yasuda equation. The resulting parameters were correlated to molecular structure. The parameter a, being a quantity for the width of the transition between the Newtonian and the non-Newtonian regime, showed a dependence on the molar mass Mw but not on Mw/Mn. The parameter λ of the Carreau-Yasuda equation was found to be the reciprocal crossover frequency for all samples with a log-Gaussian MMD. λ depends on the molar mass Mw and also on Mw/Mn. |
| doi_str_mv | 10.1007/s00397-005-0042-6 |
| format | Article |
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The polydispersities of the molar mass distributions (MMDs) lay between 1 and 16. The resulting zero shear-rate viscosities η0 covered a range from 2.5×10−3 to around 108 Pas. Above a critical molar mass of Mc≈2,900 g/mol, the experimental results can be described by the relation η0 ∼ Mw3.6, independently of the MMD. The oscillatory data were fitted with a Carreau–Yasuda equation. The resulting parameters were correlated to molecular structure. The parameter a, being a quantity for the width of the transition between the Newtonian and the non-Newtonian regime, showed a dependence on the molar mass Mw but not on Mw/Mn. 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The polydispersities of the molar mass distributions (MMDs) lay between 1 and 16. The resulting zero shear-rate viscosities η0 covered a range from 2.5×10−3 to around 108 Pas. Above a critical molar mass of Mc≈2,900 g/mol, the experimental results can be described by the relation η0 ∼ Mw3.6, independently of the MMD. The oscillatory data were fitted with a Carreau–Yasuda equation. The resulting parameters were correlated to molecular structure. The parameter a, being a quantity for the width of the transition between the Newtonian and the non-Newtonian regime, showed a dependence on the molar mass Mw but not on Mw/Mn. The parameter λ of the Carreau-Yasuda equation was found to be the reciprocal crossover frequency for all samples with a log-Gaussian MMD. λ depends on the molar mass Mw and also on Mw/Mn.</description><subject>Applied sciences</subject><subject>Creep tests</subject><subject>Crossovers</subject><subject>Dependence</subject><subject>Exact sciences and technology</subject><subject>High density polyethylenes</subject><subject>Molecular structure</subject><subject>Organic polymers</subject><subject>Parameters</subject><subject>Physicochemistry of polymers</subject><subject>Polydispersity</subject><subject>Polyethylene</subject><subject>Properties and characterization</subject><subject>Rheology and viscoelasticity</subject><subject>Shear</subject><subject>Viscosity</subject><issn>0035-4511</issn><issn>1435-1528</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpFkctOxCAUhonRxPHyAO5IjEuUSynt0nhPTNy4JxQOtqZChY7J-DA-q3TGxAUhHL7vP4sfoTNGLxml6ipTKlpFKJXlVJzUe2jFKiEJk7zZR6vyLUklGTtERzm_U8pUrfgK_dzCBMFBsICjx3MP-BtSxLkHk0gyM-CvIduYh3mDTXBb4n_i18HOQwyLOw6hOLgf3nqCS-IWmOK4gbnfjBAg4wIu_ofJmZgvSOatPOJYrGW0zV8EN-QJ0uKfoANvxgynf_cxer2_e715JM8vD08318_EirqdiZWNk9KL1inb8ko6r7hiBqDrfON44w1wY1wnhGFWdp2QzCvmoaHcWcvEMTrfxU4pfq4hz_o9rlMoGzXnNadVXcu6UGxH2RRzTuD1lIYPkzaaUb20oHct6NKCXlrQi3Pxl2yyNaNPJtgh_4uqadtaNOIXTCeMXQ</recordid><startdate>20060601</startdate><enddate>20060601</enddate><creator>STADLER, Florian J</creator><creator>PIEL, Christian</creator><creator>KASCHTA, Joachim</creator><creator>RULHOFF, Sascha</creator><creator>KAMINSKY, Walter</creator><creator>MUNSTEDT, Helmut</creator><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20060601</creationdate><title>Dependence of the zero shear-rate viscosity and the viscosity function of linear high- density polyethylenes on the mass-average molar mass and polydispersity</title><author>STADLER, Florian J ; PIEL, Christian ; KASCHTA, Joachim ; RULHOFF, Sascha ; KAMINSKY, Walter ; MUNSTEDT, Helmut</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c369t-c58d55f39d7c9245df7271aeebbf8d28fae2aadb33a1c5bb351f71fe802dcc13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Applied sciences</topic><topic>Creep tests</topic><topic>Crossovers</topic><topic>Dependence</topic><topic>Exact sciences and technology</topic><topic>High density polyethylenes</topic><topic>Molecular structure</topic><topic>Organic polymers</topic><topic>Parameters</topic><topic>Physicochemistry of polymers</topic><topic>Polydispersity</topic><topic>Polyethylene</topic><topic>Properties and characterization</topic><topic>Rheology and viscoelasticity</topic><topic>Shear</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>STADLER, Florian J</creatorcontrib><creatorcontrib>PIEL, Christian</creatorcontrib><creatorcontrib>KASCHTA, Joachim</creatorcontrib><creatorcontrib>RULHOFF, Sascha</creatorcontrib><creatorcontrib>KAMINSKY, Walter</creatorcontrib><creatorcontrib>MUNSTEDT, Helmut</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><jtitle>Rheologica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>STADLER, Florian J</au><au>PIEL, Christian</au><au>KASCHTA, Joachim</au><au>RULHOFF, Sascha</au><au>KAMINSKY, Walter</au><au>MUNSTEDT, Helmut</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dependence of the zero shear-rate viscosity and the viscosity function of linear high- density polyethylenes on the mass-average molar mass and polydispersity</atitle><jtitle>Rheologica acta</jtitle><date>2006-06-01</date><risdate>2006</risdate><volume>45</volume><issue>5</issue><spage>755</spage><epage>764</epage><pages>755-764</pages><issn>0035-4511</issn><eissn>1435-1528</eissn><coden>RHEAAK</coden><abstract>Linear high-density polyethylenes with molar masses Mw between 240 and 1,000,000 g/mol, obtained by metallocene catalysts, were characterized in shear using oscillatory and creep tests. The polydispersities of the molar mass distributions (MMDs) lay between 1 and 16. The resulting zero shear-rate viscosities η0 covered a range from 2.5×10−3 to around 108 Pas. Above a critical molar mass of Mc≈2,900 g/mol, the experimental results can be described by the relation η0 ∼ Mw3.6, independently of the MMD. The oscillatory data were fitted with a Carreau–Yasuda equation. The resulting parameters were correlated to molecular structure. The parameter a, being a quantity for the width of the transition between the Newtonian and the non-Newtonian regime, showed a dependence on the molar mass Mw but not on Mw/Mn. The parameter λ of the Carreau-Yasuda equation was found to be the reciprocal crossover frequency for all samples with a log-Gaussian MMD. λ depends on the molar mass Mw and also on Mw/Mn.</abstract><cop>Berlin</cop><pub>Springer</pub><doi>10.1007/s00397-005-0042-6</doi><tpages>10</tpages></addata></record> |
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| subjects | Applied sciences Creep tests Crossovers Dependence Exact sciences and technology High density polyethylenes Molecular structure Organic polymers Parameters Physicochemistry of polymers Polydispersity Polyethylene Properties and characterization Rheology and viscoelasticity Shear Viscosity |
| title | Dependence of the zero shear-rate viscosity and the viscosity function of linear high- density polyethylenes on the mass-average molar mass and polydispersity |
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