Relationship Between Rheology Behavior of TLCP/PEI Blend System and Its Multi-scales of Structure

Abstract

Abstract: Structural rheology of multi-scales of Vectra A950/PEI blend was studied. The prediction of the dynamic rheological behavior of Vectra A950/PEI blend according to Palierne model is consistent with the experiment results during the period of low frequency, while at high frequency, the prediction is deviated from the experiment results. The cause is that dispersed phase is deviated from sphere at a high frequency, which is related to rheological response of multi-scales of structure. The explanations are: (1) at the higher frequency, molecules orientation of Vectra A950 is hard to relax completely, and global anisotropy appears, so that the dispersed TLCP particles are easy to be deformed; (2) the relaxation process of dispersed phase droplet is slow, therefore, the deformed dispersed TLCP droplets are not able to retract at the high frequency. Affected by the two factors metioned above, Vectra A950 droplets in Vectra A950/PEI blend are deviated from sphere, resulting in different structural rheology properties from flexible polymer blends.

Key words: Thermotropic liquid crystalline(TLCP), Blend, Rheological behavior, Relaxation time

CLC Number:

O631

TrendMD:

YU Ruo-Bing, ZHOU Chi-Xing, YU Wei . Relationship Between Rheology Behavior of TLCP/PEI Blend System and Its Multi-scales of Structure[J]. Chem. J. Chinese Universities, 2004, 25(11): 2140.

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Relationship Between Rheology Behavior of TLCP/PEI Blend System and Its Multi-scales of Structure

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