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Characterization of High-Order Structure and Impact Strength of Multi-Phase Polymer Alloys
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Narisawa, lkuo / Toyoda, Syoji / Kitamura, Takuro / Inoue, Kazushige
A quantitative characterization of the degree of agglomeration of the particles in multi-phase polymer alloy systems has been carried out. A numerical agglomeration distribution function and its 4 moments were calculated from SEM photographs using computer image analysis. In a model alloy system of PC/MBS a good correlation between the degree of agglomeration of the MBS and of the impact strength has been obtained. In PBT/PC alloys, the effect of mixing conditions in the heating rolls on the distribution of particle diameter, ligament thickness between particles and degree of agglomeration have been examined. A similar analysis has been carried out on the PBT/PC alloys mixed with an extruder. The results showed that increasing agglomeration of the dispersed phase (PC) reduced the impact strength when the matrix was composed of high molecular weight PBT.
Key words: Agglomeration / Impact Strength / Polymer Alloy / Mixing / Extrusion