Extensional flow of stiff-chain polymer solutions in the semidilute regime

被引:2
作者
Romo-Uribe, Angel [1 ]
机构
[1] Johnson & Johnson Vis Care Inc, Res & Dev Adv Sci & Technol Div, Jacksonville, FL 32256 USA
关键词
structure-property relationships; rheology; viscosity; viscoelasticity; FILAMENT-STRETCHING RHEOMETRY; VISCOSITY; DYNAMICS; ISOCYANATE); BEHAVIOR;
D O I
10.1002/app.51660
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Stiff-chain polymers are preponderant in biology as structural components of tissue and living cells. Hence, understanding their solution behavior under different flow histories is fundamental. Here, the extensional flow under capillary breakup of isotropic semidilute solutions of stiff-chain poly-n-butyl isocyanate (PBIC) and hydroxypropyl cellulose (HPC) has been studied. PBIC-chloroform and HPC-water were studied as the polymer-solvent interaction tunes the molecular conformation (Romo-Uribe, J. Appl. Polym. Sci. 2021, 138, e49712). PBIC in chloroform exhibits a rod-like conformation, and capillary breakup at constant concentration and temperature initially showed an exponential decay of filament diameter D(t) followed by a sudden decrease of D, and finally slow filament thinning. Increasing the molecular weight by threefold increased the breakup time tau(b) by twofold. HPC in water adopts a semiflexible conformation and the filament thinning also exhibited three stages, however the breakup time was shorter than PBIC. Hence, the extensional viscosity as a function of strain of PBIC and HPC solutions exhibited three regimes, where initial constant extensional viscosity eta(E) was followed by strain hardening and finally a sudden decrease of extensional viscosity as strain increased. It was found that the filament breakup time tau(b) is a function of the radius of gyration R-g.
引用
收藏
页数:8
相关论文
共 47 条
[31]   UNIAXIAL EXTENSION OF A LYOTROPIC LIQUID-CRYSTALLINE POLYMER-SOLUTION [J].
OOI, YW ;
SRIDHAR, T .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1994, 33 (10) :2368-2373
[32]   Shear-Induced Isotropic-Nematic Transition in Poly(ether ether ketone) Melts [J].
Parisi, Daniele ;
Seo, Jiho ;
Nazari, Behzad ;
Schaake, Richard P. ;
Rhoades, Alicyn M. ;
Colby, Ralph H. .
ACS MACRO LETTERS, 2020, 9 (07) :950-956
[33]   EXTENSIONAL FLOW - A MATHEMATICAL PERSPECTIVE [J].
PETRIE, CJS .
RHEOLOGICA ACTA, 1995, 34 (01) :12-26
[34]   Cross-streamline migration of a semiflexible polymer in a pressure driven flow [J].
Reddig, S. ;
Stark, H. .
JOURNAL OF CHEMICAL PHYSICS, 2011, 135 (16)
[35]  
Romo-Uribe A., 1990, THESIS NATL U MEXICO
[36]   Shear rheology and scaling of semiflexible polymers: Effect of polymer-solvent interactions in the semidilute regime [J].
Romo-Uribe, Angel .
JOURNAL OF APPLIED POLYMER SCIENCE, 2021, 138 (03)
[37]   The transient extensional behavior of polystyrene-based Boger fluids of varying solvent quality and molecular weight [J].
Solomon, MJ ;
Muller, SJ .
JOURNAL OF RHEOLOGY, 1996, 40 (05) :837-856
[38]  
Stelter M, 1999, J APPL POLYM SCI, V74, P2773, DOI 10.1002/(SICI)1097-4628(19991209)74:11<2773::AID-APP25>3.0.CO
[39]  
2-9
[40]  
Szabo P, 1997, RHEOL ACTA, V36, P277, DOI 10.1007/BF00366669