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Anisotactic PP was prepared over the rac-Et (Ind)2ZrCl2- MAO catalyst system and PP films were treated with a low-frequency (50 Hz) glow discharge plasma. The treatment resulted in whole-volume structural modifications whose extent was related to the initial α-/γ-phase ratio in original PP. At γ-phase contents < 60%, nearly all the γ- became the α-phase, the m. p. of the PP treated rose (from 130°C...
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