Enhanced compatibility of SAN and PC in their blends by injection with extremely high shear.

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  • 超高速せん断射出によるＳＡＮ‐ＰＣブレンドの部分相容化
  • チョウコウソク センダン シャシュツ ニ ヨル SAN-PC ブレンド ノ ブ

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Abstract

Originally incompatible blends of SAN 30% and PC 70% were extruded with extremely high shear rate up to 107 s-1 as a typical example of the blends. The.blends are of binary systems microscopically in the first run of extruding, where SAN is present as small spherical particles in PC matrix. The apparent volume fraction of the spherical SAN estimated from the microscopic photographs decreases with the shear rate. The fraction is decreased also with the repeated runs. The blend appears uniform or structureless at the fifth run. Dynamic loss tangent gives two peaks corresponding to T ?? of SAN and PC, respectively. The latter shifts to lower temperatures with the number of extruding run. It is considered that some of SAN is mixed with PC in a compatible form. The pulsed NMR analysis supports the conclusion.

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