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a) b - École Polytechnique de Montréal

a) b - École Polytechnique de Montréal

a) b - École Polytechnique de Montréal

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Continuity Scheme (a)<br />

Figure 6-10. Triangular concentration diagram showing two pathways: Continuity Scheme (a),<br />

and Continuity Scheme (b). Scheme (a) is shown in Figure 6-11 and represents the case where<br />

the concentration of PMMA is kept constant at 40% of total while the concentration ratio of the<br />

PS and HDPE phases change. Scheme (b) is shown in Figure 6-12 where the concentration of<br />

PS is kept constant at 10% of total while the concentration ratio of PMMA and HDPE phases<br />

change. These two pathways were chosen since they pass through a range of different<br />

morphological states.<br />

In Figure 6-11, the continuity of the PS phase following Scheme a is examined as a function of<br />

the % concentration of HDPE in (HDPE plus PS) where HDPE plus PS always equals 60% in<br />

the ternary blend with PMMA. Thus 100% HDPE refers to the 60%HDPE/40%PMMA blend<br />

while 50% HDPE in Figure 6-11 refers to the 30%HDPE/30%PS/40%PMMA blend. At 0% of<br />

HDPE a co-continuous morphology of 40/60 PMMA/PS is formed (point a in Figure 6-11).<br />

195<br />

Continuity Scheme (b)

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