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Wei Wang, et al. Time-dependent  rheological behavior of branched polymer melts in extensional flows.
Mechanics of Time-Dependent Materials,2016,20(1): 123-137.
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Time-dependent rheological behavior of branched polymer melts in extensional flows
×÷Õß:Wang, W (Wang, Wei)[ 1,2 ] ; Hu, CX (Hu, Changxu)[ 1 ] ; Li, WW (Li, Wenwen)[ 1 ]


MECHANICS OF TIME-DEPENDENT MATERIALS


¾í: 20
ÆÚ: 1
Ò³: 123-137
DOI: 10.1007/s11043-015-9287-3

³ö°æÄê: FEB 2016

²é¿´ÆÚ¿¯ÐÅÏ¢

MECHANICS OF TIME-DEPENDENT MATERIALS  

³ö°æÉÌ SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS

ISSN: 1385-2000
eISSN: 1573-2738

Ñо¿ÁìÓò Mechanics
Materials Science



ÕªÒª
The viscoelastic flow of low-density polyethylene melts in a cross-slot channel is studied numerically for the double convected Pom-Pom (DCPP) and single modified DCPP (S-MDCPP) models. The equal low-order finite elements for velocity-pressure-stress variables are implemented to solve the flow fields using the pressure-stabilized iterative fractional step algorithm. The distributions of axial velocity along the channel centerline and the principal stress difference achieved by numerical predictions are in quantitative good agreement with the reported experimental results. Furthermore, the evolution of backbone stretch of macromolecule with flow time is demonstrated, and then an exponential decay function is proposed linking the microscale stretch relaxation time with the macroscale flow time, in order to reveal the stretch relaxation response of the branched polymer. The effects of the Weissenberg number and several constitutive parameters of the S-MDCPP model on the rheological behavior of polymer melts are discussed.

¹Ø¼ü´Ê
×÷Õ߹ؼü´Ê:Numerical simulation; Complex flow; Rheological behavior; Extensional flow; Viscoelastic constitutive models; Polymer melts

KeyWords Plus:CROSS-SLOT FLOW; PLANAR CONTRACTION FLOW; POM-POM MODEL; FINITE-ELEMENT-METHOD; CONSTITUTIVE MODELS; NUMERICAL SIMULATIONS; POLYETHYLENE MELT; EQUATIONS; RHEOMETRY; FLUIDS

×÷ÕßÐÅÏ¢
ͨѶ×÷ÕßµØÖ·: Wang, W (ͨѶ×÷Õß) Qingdao Univ Sci & Technol, Minist Educ, Shandong Prov Key Lab Rubber Plast, Key Lab Rubber Plast, Qingdao 266042, Peoples R China.
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Qingdao University of Science & Technology  
ͨѶ×÷ÕßµØÖ·: Wang, W (ͨѶ×÷Õß) Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China.
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Dalian University of Technology  


µØÖ·:  [ 1 ] Qingdao Univ Sci & Technol, Minist Educ, Shandong Prov Key Lab Rubber Plast, Key Lab Rubber Plast, Qingdao 266042, Peoples R China
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Qingdao University of Science & Technology  
[ 2 ] Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Dalian University of Technology  


µç×ÓÓʼþµØÖ·:ww@qust.edu.cn

»ù½ð×ÊÖúÖÂл
»ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ
National Natural Science Foundation of China  21274072
11302043  
State Key Laboratory of Structural Analysis for Industrial Equipment  GZ1213  
Key Laboratory of Rubber-plastics, Ministry of Education  KF2010007  
²é¿´»ù½ð×ÊÖúÐÅÏ¢¹Ø±Õ»ù½ð×ÊÖúÐÅÏ¢   

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China through Contract/Grant numbers 21274072, 11302043, and the State Key Laboratory of Structural Analysis for Industrial Equipment (No. GZ1213) and the Key Laboratory of Rubber-plastics, Ministry of Education (No. KF2010007).

³ö°æÉÌ
SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS

Àà±ð / ·ÖÀà
Ñо¿·½Ïò:Mechanics; Materials Science

Web of Science Àà±ð:Mechanics; Materials Science, Characterization & Testing

ÎÄÏ×ÐÅÏ¢
ÎÄÏ×ÀàÐÍ:Article

ÓïÖÖ:English

Èë²ØºÅ: WOS:000371303800007

ISSN: 1385-2000

eISSN: 1573-2738

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