𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis of a TiCl4 Ziegler-Natta Catalyst Supported on Spherical MgCl2 · nEtOH for the Polymerization of Ethylene and Propylene

✍ Scribed by Lidiane A. Almeida; Maria de Fátima V. Marques

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
661 KB
Volume
6
Category
Article
ISSN
1862-832X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Experiments designed to prepare Ziegler‐Natta catalysts with controlled particle morphology are reported. Different dealcoholation processes are used on the adduct MgCl~2~ · __n__EtOH to prepare the catalysts: either thermal treatment or chemical dealcoholation employing different substances such as titanium tetrachloride, triethylaluminium, dichlorodimethylsilane, and chlorotrimethylsilane. In addition, dichlorodimethylsilane dealcoholation is also performed after thermal treatment. SEM analysis of adducts, supports, and catalysts is carried out. The obtained catalysts are characterized through impregnated titanium content evaluation. The polyethylenes and poly(propylene)s obtained employing the so prepared catalysts show spherical morphology when examined by optical microscopy.magnified image

📜 SIMILAR VOLUMES

Morphological study of spherical MgCl2.n
Morphological study of spherical MgCl2.nEtOH supported TiCl4 Ziegler-Natta catalyst for polymerization of ethylene
✍ R. Jamjah; G. H. Zohuri; J. Vaezi; S. Ahmadjo; M. Nekomanesh; M. Pouryari 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 602 KB

## Abstract Spherical MgCl~2~·nEtOH was prepared by adducting ethanol to MgCl~2~ using melt quenching method. Effect of molar ratio of [EtOH]/[MgCl~2~] = 2.8–3.05 on the morphology and particle size of the MgCl~2~·nEtOH were studied. The best adduct of spherical morphology was obtained when 2.9 mol

Effect of diether as internal donor on M
Effect of diether as internal donor on MgCl2-supported Ziegler–Natta catalyst for propylene polymerization
✍ Nannan Cui; Yucai Ke; Huayi Li; Zhicheng Zhang; Cunyue Guo; Zhanxia Lv; Youliang 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 92 KB 👁 2 views

## Abstract This article demonstrates the influence of the molar ratio between diether as internal donor and Magnesium dichloride in processing of the catalyst preparation on the catalytic performance for propylene polymerization with MgCl~2~‐supported Ziegler–Natta catalyst. The effect of electron

Fractionation and characterization of an
Fractionation and characterization of an ethylene–propylene copolymer produced with a MgCl2/SiO2/TiCl4/diester-type ziegler–natta catalyst
✍ Qi Dong; Zhi-Qiang Fan; Zhi-Sheng Fu; Jun-Ting Xu 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 252 KB 👁 2 views

## Abstract An ethylene–propylene copolymer synthesized with a Ziegler–Natta catalyst was fractionated by a combination of dissolution/precipitation and temperature‐gradient extraction fractionation. The fractions were characterized with ^13^C‐NMR, differential scanning calorimetry, and wide‐angle

Effect of polymerization temperature on
Effect of polymerization temperature on the microtacticity of isotactic poly(propylene) prepared using heterogeneous (MgCl2-supported) Ziegler-Natta catalysts
✍ John C. Chadwick; Giampiero Morini; Giulio Balbontin; Olof Sudmeijer 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 533 KB

A study of the effect of polymerization temperature on the microtacticity of poly(propy1ene) prepared using various MgClz-supported catalysts has shown that, in almost all cases, an increase in temperature leads not only to higher proportions of isotactic polymer but also to increased stereoregu1ari