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Rheologica Acta

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01.12.2004 | Original Contribution

Quantitative analysis of melt elongational behavior of LLDPE/LDPE blends

verfasst von: Manfred H. Wagner, Saeid Kheirandish, Masayuki Yamaguchi

Erschienen in: Rheologica Acta | Ausgabe 2/2004

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Abstract

Shear and elongational data of blends of linear (LLDPE) and branched (LDPE) polyethylene are reported. Blends show thermo-rheological complex behavior. Also, in unidirectional shear or elongational flow, the linear-viscoelastic deformation regime of the blends is significantly reduced, and the terminal relaxation times of the blends are shifted in the direction of the LDPE homopolymer. Quantitative analysis of elongational viscosity data by use of the Molecular Stress Function (MSF) model reveals that the strain hardening behavior of LLDPE/LDPE blends is completely determined by the LDPE component. While the linear-viscoelastic response changes with blend composition, the nonlinear strain measure is independent of blend composition for blends with LDPE contents between 100% (homopolymer) and 20%. Even for blends containing only 5 or 10% of LDPE, the LDPE strain measure gives a good qualitative description of the strain hardening observed. We argue that this complex behavior of LLDPE/LDPE blends can be understood by assuming the existence of two phases in the blends: (a) one phase composed of highly branched low molecular weight (MW) chains from both the LLDPE minority phase and the low MW part of LDPE and (b) one phase composed of the high MW (more linear) part of LLDPE and the higher MW part of LDPE. Composition of the phases is both temperature and deformation dependent.

Vorheriger Artikel Practical comparison of differential viscoelastic constitutive equations in finite element analysis of planar 4:1 contraction flow

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Agamalian M, Alamo RG, Kim MH, Londono JD, Mandelkern L, Wignall GD (1999) Phase behavior of blends of linear and branched polyethylenes on micron length scales via ultra-small-angle neutron scattering. Macromolecules 32:3093–3096CrossRef

Ajji A, Sammut P, Huneault MA (2003) Elongational rheology of LLDPE/LDPE blends. J Appl Polym Sci 88:3070–3077CrossRef

Bastian H (2001) Non-linear viscoelasticity of linear and long-chain-branched polymer melts in shear and extensional flows. Ph D Thesis, Universität Stuttgart, Germany, http://elib.uni-stuttgart.de/opus/volltexte/2001/894

Bin Wadud SE, Baird DG (2000) Shear and extensional rheology of sparsely branched metallocene catalyzed polyethylenes. J Rheol 44:1151–1167CrossRef

Carella JM, Gotro JT, Graessley WW (1986) Thermorheological effects of long-chain branching in entangled polymer melts. Macromolecules 19:659–667

Cho K, Lee BH, Hwang KM, Lee H, Choe S (1998) Rheological and mechanical properties in polyethylene blends. Polym Eng Sci 38:1969–1975CrossRef

Choi P (2000) Molecular dynamics study of the thermodynamics of HDPE/butane-based LLDPE blends. Polymer 41:8741–8747CrossRef

Curto D, La Mantia FP, Acierno D (1983) The rheological behavior of HDPE/LDPE blends. I. End effects and shear viscosity. Rheol Acta 22:197–208

de Gennes PG (1974) Remarks on entanglements and rubber elasticity. J Phys 35:1–133

Doi M, Edwards SF (1978) Dynamics of concentrated polymer systems. Part III: The constitutive equation. Faraday Trans II 74:1818–1832CrossRef

Doi M, Edwards SF (1979) Dynamics of concentrated polymer systems. Part IV: Rheological properties. Faraday Trans II 75:38–54CrossRef

Fleissner M (1988) Elongational flow of HDPE samples and bubble instability in film blowing. Int Polym Processing 3/4:229–233

Gabriel C, Münstedt H (2003) Strain hardening of various polyolefins in uniaxial elongational flow. J Rheol 47:619–630CrossRef

Gabriel C, Kaschta J, Münstedt H (1998) Influence of molecular structure on rheological properties of polyethylenes. I. Creep recovery measurements in shear. Rheol Acta 37:7–20CrossRef

Ghijsels A, Ente JJM, Raadsen J (1992) Melt strength behavior of polyethylene blends. Int Polym Processing VII:44–50

Graebling D, Muller R, Palierne JF (1993) Linear viscoelastic behavior of some incompatible polymer blends in the melt. Interpretation of data with a model of emulsion of viscoelastic liquids. Macromolecules 26:320–329

Graessley WW, Raju VR (1984) Some rheological properties of solutions and blends of hydrogenated polybutylene. J Polym Sci Polym Symp 71:77–93

Gramespacher H, Meissner J (1992) Interfacial tension between melts measured by shear oscillations of their blends. J Rheol 36:1127–1141CrossRef

Gramespacher H, Meissner J (1997) Melt elongation and recovery of polymer blends, morphology, and influence of interfacial tension. J Rheol 41:27–44CrossRef

Hameed T, Hussein I (2002) Rheological study of the influence of M_w and comonomer type on the miscibility of m-LDPE and LDPE. Polymer 43:6911–6929CrossRef

Ho K, Kale L, Montgomery S (2002) Melt strength of linear low-density polyethylene/low-density polyethylene blend. J Appl Polym Sci 85:1408–1418CrossRef

Hussein IA (2003) Influence of composition distribution and branch content on the miscibility of m-LDPE and HDPE blends: Rheological investigation. Macromolecules 36:2024–2031CrossRef

Hussein IA, Williams MC (2001) Rheological study of the miscibility of LLDPE/LDPE blends and the influence of T_mix. Polym Eng Sci 41:696–701CrossRef

Kazatchkov B, Bohnet N, Goyal SK, Hatziriakos SG (1999) Influence of molecular structure on the rheological and processing behavior of polyethylene resins. Polym Eng Sci 39:804–815CrossRef

Kwag H, Rana D, Cho K, Rhee J, Woo T, Lee BH, Choe S (2000) Binary blends of metallocene polyethylene with conventional polyolefins. Rheological and morphological properties. Polym Eng Sci 40:1672–1681CrossRef

Lee HS, Denn MM (2000) Blends of linear and branched polyethylenes. Polym Eng Sci 40:1132–1142CrossRef

Li L, Masuda T, Takahashi M (1990) Elongational flow behavior of ABS polymer melts. J Rheol 34:103–116CrossRef

Lin GG, Shih HH, Chai PC, Hsu SJ (2002) Influence of side-chain structures on the viscoelasticity and elongation viscosity of polyethylene melts. Polym Eng Sci 42:2213–2221CrossRef

Liu C, Wang J, He J (2002) Rheological and thermal properties of m-LLDPE blends with m-HDPE and LDPE blends. Polymer 43:3811–3818CrossRef

Lohse DJ, Milner ST, Fetters LJ, Xenidou M, Hadjichristidis N, Menedelson RA, Garcia-Franco RA, Lyon MK (2002) Well-defined, model long chain branched polyethylene. 2. Melt rheological behavior. Macromolecules 35:3066–3075CrossRef

Malmberg A, Gabriel C, Steffl T, Münstedt H, Löfgren B (2002) Long-chain branching in metallocene-catalyzed polyethylenes investigated by low oscillatory shear and uniaxial extensional rheometry. Macromolecules 35:1038–1048CrossRef

Marrucci G, Hermans JJ (1980) Nonlinear viscoelasticity of concentrated polymeric liquids. Macromolecules 13:380–387

Mavridis H, Shroff RN (1992) Temperature dependence of polyolefin melt rheology. Polym Eng Sci 32:1778–1791

Micic P, Bhattacharya SN (2000) Rheology of LLDPE, LDPE and LLDPE/LDPE blends and its relevance to the film blowing process. Polym Int 49:1580–1589CrossRef

Micic P, Bhattacharya SN, Field G (1996) Melt strength and elastic behavior of LLDPE/LDPE blends. Int Polym Processing XI:1–20

Micic P, Bhattacharya SN, Field G (1997) Rheological behavior of LLDPE/LDPE blends under elongational deformation. Int Polym Processing XII:110–115

Münstedt H (1981) Rheology of rubber-modified polymer melts. Polym Eng Sci 21:259–270

Münstedt H, Kurzbeck S, Egersdörfer L (1998) Influence of molecular structure on rheological properties of polyethylenes. II. Elongational behavior. Rheol Acta 37:21–29CrossRef

Palierne JF (1990) Linear rheology of viscoelastic emulsions with interfacial tension. Rheol Acta 29:204–2147

Satoh N, Tomiyama H, Kajiwara T (2001) Viscoelastic simulation of film casting process for a polymer melt. Polym Eng Sci 41:1564–1579CrossRef

Schlund B, Utracki LA (1987) Linear low density polyethylenes and their blends. Part 5. Extensional flow of LLDPE blends. Polym Eng Sci 27:1523–1529

Schuman T, Stepanov EV, Nazarenko S, Capaccio G, Hiltner A, Baer E (1998) Interdiffusion of linear and branched polyethylene in microlayers studied via melting behavior. Macromolecules 31:4551–4561CrossRef

Stephens CH, Hiltner A, Baer E (2003) Phase behavior of partially miscible blends of linear and branched polyethylenes. Macromolecules 36:2733–2741CrossRef

Takahashi T, Wu W, Toda H, Takimoto J, Akatsuka T, Koyama K (1997) Elongational viscosity of ABS polymer melts with soft or hard butadiene particles. J Non-Newtonian Fluid Mech 68:259–269

Takahashi T, Takimoto J, Koyama K (1999) Elongational viscosity for miscible and immiscible polymer blends. I. PMMA and AS with similar elongational viscosity. J Appl Polym Sci 73:757–766CrossRef

Trinkle S, Friedrich C (2001) Van Gurp-Palmen plot: a way to characterize polydispersity of linear polymers. Rheol Acta 40:322–328CrossRef

Utracki LA, Schlund B (1987) Linear low density polyethylenes and their blends. Part 4. Shear flow of LLDPE blends with LLDPE and LDPE. Polym Eng Sci 27:1512–1522

Wagner MH (1994) The origin of the C₂ term in rubber elasticity. J Rheol 38:655–679CrossRef

Wagner MH (1999) Constitutive equations for polymer melts and rubbers: Lessons from the 20th century. Korea-Australia Rheology Journal 11:293–304

Wagner MH, Schaeffer J (1992) Constitutive equations from Gaussian slip-link network theories in polymer melt rheology. Rheol Acta 31:22–31

Wagner MH, Schaeffer J (1993) Rubbers and polymer melts: Universal aspects of nonlinear stress-strain relations. J Rheol 37:643–661CrossRef

Wagner MH, Bastian H, Ehrecke P, Hachmann P, Meissner J (1998) A constitutive analysis of uniaxial, equibiaxial, and planar extension of a linear and branched polyethylene melts. In: Emri I et al. (eds) Progress and trends in rheology. Darmstadt, p 4–7

Wagner MH, Bastian H, Hachmann P, Meissner J, Kurzbeck S, Münstedt H, Langouche F (2000) The strain-hardening behavior of linear and long-chain-branched polyolefin melts in extensional flows. Rheol Acta 39:97–109CrossRef

Wagner MH, Rubio P, Bastian H (2001) The molecular stress function model for polydisperse polymer melts with dissipative convective constraint release. J Rheol 45:1387–1412CrossRef

Wagner MH, Bastian H, Bernnat A, Kurzbeck S, Choon KC (2002) Determination of elongational viscosity of polymer melts by RME and Rheotens experiments. Rheol Acta 41:316–325CrossRef

Wagner MH, Yamaguchi M, Takahashi M (2003) Quantitative assessment of strain hardening of low-density polyethylene melts by the molecular stress function model. J Rheol 47:779–793CrossRef

Walter P, Trinkle S, Suhn J, Mäder D, Friedrich C, Mülhaupt R (2000) Short and long chain branching of polyethene prepared by means of ethene copolymerization with 1-eicosene using MAO activated Me₂Si(Me₄Cp)(N^tBu)TiCl₂. Macromol Chem Phys 201:604–612CrossRef

Wignall GD, Alamo RG, Ritchson EJ, Mandelkern L, Schwahn D (2001) SANS studies on liquid-liquid phase separation in heterogeneous and metallocene-based linear low-density polyethylenes. Macromolecules 34:8160–8165CrossRef

Winter HH, Mours M (2003) IRIS Development, http://rheology.tripod.com/

Wood-Adams PM (2001) The effect of long chain branches on the shear flow behavior of polyethylene. J Rheol 45:203–210CrossRef

Yamaguchi M (2001) Rheological properties of linear and crosslinked polymer blends: relation between crosslink density and enhancement of elongational viscosity. J Polym Sci Part B Polym Phys 39:228–235CrossRef

Yamaguchi M, Abe S (1999) LLDPE/LDPE blends. I. Rheological, thermal and mechanical properties. J Appl Polym Sci 74:3153–3159CrossRef

Yamaguchi M, Gogos CG (2001) Quantitative relation between shear history and rheological properties of LDPE. Adv Polym Technol 20:261–269CrossRef

Yamaguchi M, Suzuki K (2001) Rheological properties and foam processability for blends of linear and crosslinked polyethylenes. J Polym Sci Polym Phys Ed 39: 2159–2167CrossRef

Yamaguchi M, Suzuki K (2002) Enhanced strain hardening in elongational viscosity for HDPE/crosslinked HDPE blend. II. Processability of thermoforming. J Appl Polym Sci 86:79–83CrossRef

Yamaguchi M, Takahashi M (2001) Rheological properties of low-density polyethylenes produced by tubular and vessel processes. Polymer 42:8663–8670CrossRef

Yamaguchi M, Todd DB, Gogos CG (2003) Rheological properties of LDPE processed by conventional processing machines. Adv Polym Technol 22:179–187CrossRef

Titel: Quantitative analysis of melt elongational behavior of LLDPE/LDPE blends
verfasst von: Manfred H. Wagner
Saeid Kheirandish
Masayuki Yamaguchi
Publikationsdatum: 01.12.2004
Verlag: Springer-Verlag
Erschienen in: Rheologica Acta / Ausgabe 2/2004
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI: https://doi.org/10.1007/s00397-004-0400-9

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