Product Details of 3779-29-1In 2008, Cardoso, Renata da Silva;Galvao da Silva, Micheli;Marques, Maria de Fatima Vieira published 《Evaluation of internal and external donors in the supported Ziegler-Natta catalyst for stereospecific propylene polymerization》. 《Annual Technical Conference – Society of Plastics Engineers》published the findings. The article contains the following contents:
In the present work, the effects of Bu phthalate as internal electron donor on the preparation of MgCl2-supported Ziegler-Natta catalyst and of dimethoxy-diphenylsilane as external electron donor were evaluated in propylene polymerization and compared with the new prepared Ziegler-Natta systems employing diverse internal and external electron donors. Polymers were characterized by IR absorption spectroscopy, differential scanning calorimetry and by heptane extraction The new prepared catalysts did not achieve the same polymer yields compared with the reference catalyst. On the other hand, the catalysts with the new internal donors produced polymers with isotacticity index up to 98% in the polymerization conditions employed. The experimental procedure involved many compounds, such as Diethyl cyclobutane-1,1-dicarboxylate (cas: 3779-29-1) .
Diethyl 1,1-cyclobutanedicarboxylate(cas:3779-29-1 Product Details of 3779-29-1) reacts with silicon to form diethyl esters and magnesium to form magnesium salts. The reaction time for this compound is short, which may be due to its ability to undergo debromination.
Reference:
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