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The present article proposes a simple way to dramatically alter the pore architecture of Mg(OEt) 2 -based Ziegler-Natta catalysts by the addition of a small amount of i-propanol the synthesis of Mg(OEt) 2 . The incorporated i-propoxide distorts the crystalline structure of Mg(OEt) 2 , finally causing the phase transformation and significant densification of particles. Such modifications completely alternate the pore architecture of resultant catalysts, which contribute to the design of catalytic properties.

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