A phenomenological model for the viscosity reductions in blends of HMMPE containing a small quantity of thermotropic liquid crystalline copolyester HBA/HQ/SA

Polymer

Volumn 46, Issue 19 SPEC. ISS., 2005, Pages 8151-8156

  Chan, Chi Kwong ^a   Gao, P ^a  

^a HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY   (Hong Kong)

Author keywords

Converging capillary flow; Forced molecular alignment and disengagement; HMMPE+TLCP blends

Indexed keywords

CAPILLARY FLOW; FLOW OF FLUIDS; LIQUID CRYSTAL POLYMERS; MATHEMATICAL MODELS; PHASE TRANSITIONS; POLYETHYLENES; THERMOTROPIC LIQUID CRYSTALS; VISCOSITY OF LIQUIDS;

CONVERGING CAPILLARY FLOW; FORCED MOLECULAR ALIGNMENT AND DISENGAGEMENT; HMMPE+TLCP BLENDS; PHENOMENOLOGICAL MODEL;

POLYMER BLENDS;

POLYETHYLENE;

EID: 23944433915     PISSN: 00323861     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.polymer.2005.06.095     Document Type: Article

References (16)

1. W.N. Kim, and M.M. Denn Properties of blends of a thermotropic liquid crystalline polymer with a flexible polymer (Vectra/PET) J Rheol 36 1992 1477 1498
2. W. Brostow, T. Sterzynsk, and S. Triouleyre Rheological properties and morphology of binary blends of a longitudinal polymer liquid crystal with engineering polymers Polymer 37 1996 1561 1574
3. C. Whitehouse, P. Gao, X.H. Lu, and C.K. Chai The viscosity reducing effect of very low concentrations of a thermotropic copolyester in a matrix of HDPE Polym Eng Sci 37 1997 1944 1958
4. C.K. Chan, C. Whitehouse, P. Gao, and C.K. Chai Flow induced chain alignment and disengagement as the viscosity reduction mechanism within TLCP/HDPE blends Polymer 42 2001 7847 7856
5. A.A. Handlos, and D.G. Baird Processing and associated properties of in situ composites based on thermotropic liquid crystalline polymers and thermoplastics J Macromol Sci, Rev Macromol Chem C35 1995 183 238
6. D.H. Weinkauf, and D.R. Paul Effects of structural order on barrier properties W.J. Koros Barrier polymers and structures ACS Symposium Series 423 1990 ACS Washington, DC [chapter 3]
7. Cogswell NF, Griffin BP, Rose JB. Compositions of melt-processable polymers having improved processability, US Patent 4,386,174; 1983 and 4,438,236; 1984.
8. A. Kohli, N. Chung, and R.A. Weiss Polym Eng Sci 29 1989 573
9. C.K. Chan, C. Whitehouse, and P. Gao The effect of TLCP melt structure on the bulk viscosity of HMMPE Polym Eng Sci 39 1999 1353 1364
10. Chan CK, Gao P. Shear-induced interactions in blends of HMMPE containing a small quantity of thermotropic liquid crystalline copolyester HBA/HQ/SA. Submitted for publication.
11. Blonski S, Brostow W, Jonah DA, Hess M. Solubility and miscibility in ternary systems: Polymer liquid crystal+flexible polymer+solvent. Macromolecules 1993;26:84-8.
12. A. Ajji, and P.A. Gignac Rheology and morphology of some thermotropic blends with a liquid crystalline copolyester Polym Eng Sci 32 1992 903 908
13. J.W.H. Kolnaar, and A. Keller A singularity in the melt flow of polyethylene with wider implications for polymer melt flow rheology J Non-Newtonian Fluid Mech 69 1997 71 98
14. L.A. Utracki, D.J. Walsh, and R.A. Weiss Polymer alloys, blends and ionomers - an overview L.A. Utracki R.A. Weiss Multiphase polymers: Blends and ionomers ACS Symposium Series 395 1989 American Chemical Society Washington, DC [chapter 1]
15. P. Gao, M.R. Mackley, and D.F. Zhao The deformation and break-up of thermotropic co-polyester droplets in a molten polypropylene matrix subjecting to oscillatory shear and entry flow J Non-Newtonian Fluid Mech 80 1999 199 216
16. J.-H. Chang, B.-K. Choi, J.-H. Kim, S.-M. Lee, and M.-S. Bang The effect of composition on thermal, mechanical and morphological properties of thermotroic liquid crystalline polyester with alkyl side-group and polycarbonate blends Polym Eng Sci 37 1997 1564 1571