Processing rheology

In another study [31] it has been reported that haze of LLDPE is mainly a consequence of light scattered by the spherulites. Thus, origin of poor clarity is not the same in LLDPE as in HP LDPE. In HP LDPE the haze is produced by surface defects coming from processing rheology [48,54,55]. Processing variables, therefore, do not have the same effect on LLDPE as they do on HP LDPE. 

While performance of resource recovery processes have been significantly improved in the past two decades, further efforts must be directed to 1. minimize shear degradation, 2. control adsorption, 3 control process rheology, and 4 provide appropriate chemical stability. These are the properties which fundamental and applied research must target during the next decade. 

Kissi NE and Piau J-M, "Stability Phenomena During Polymer Melt Extrusion" in Piau J-M and Agassant J-F (Eds), "Rheology for Polymer Melt Processing", Rheology Series, Vol. 5, Elsevier, Amsterdam, 1996, pp 389-420. Langelaan HC and Gotsis AD, J Rheol 40 (1996) 107. 

Piau J-M and Agassant J-F (Eds), Rheology for Polymer Melt Processing", Rheology Series, Vol. 5, Elsevier, Amsterdam, 1996. 

As will be seen in the second section, computer techniques are very useful in this optimization process. Rheological measurements are used to predict physical stability, and accelerated and longterm storage tests are used to confirm physical stability. There are four papers in this section which deal with these topics. The papers by Knowles et al. and Warrington et al. deal with novel... 

Process Rheology. Since the polymerization reaction is completed during the fabrication step, the initial rate of viscosity increase and the gel point, must... 

A review of initial research on processing, rheology and properties of thermoplastic starch is provided by Lai [3] and concentrates on effects of starch... 

Y. Oyanagi, Introduction to Polymer Processing Rheology, Agune, Tokyo (1996). 

Franchini, E., Galy, J., and Gerard, J.F. (2009) Sepiolite-based epoxy nanocomposites Relation between processing, rheology, and morphology. 

Marrucci G, Maffettone PL (1993) Liquid crystalline polymers. Pergamon, New York Mead DW (1994) Determination of molecular weight distributions of linear flexible polymers from linear viscoelastic material functions. J Rheol 38 1797-1827 Moldenaers P, Yanase H, Mewis J (1990) Effect of shear history on the theological behavior of lyotropic liquid crystals. Liq Cryst Polym 24(1990) 370-380 Muir MC, Porter RS (1989) Processing rheology of liquid taystal polymers a review. Mol Cryst Liq Cryst 169 83-95... 

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