Question

what are the advantages of Ziegler natta polymerisation over the free radical polymerisation?​

Answer 1

The Ziegler-Natta (ZN) catalyst, named after two chemists: Karl Ziegler and Giulio Natta, is a powerful tool to polymerize α-olefins with high linearity and stereoselectivity (Figure 1). A typical ZN catalyst system usually contains two parts: a transition metal (Group IV metals, like Ti, Zr, Hf) compound and an organoaluminum compound (co-catalyst). The common examples of ZN catalyst systems include TiCl4 + Et3Al and TiCl3 + AlEt2Cl.

Answer 2

Zeigler Natta polymerization produces a more rigid, linear, dense, and tensile polymer with increased density.

• When many monomer molecules interact with one another during the polymerization process, a polymer is produced.
• Tetrafluoroethylene undergoes a polymerization step to create Teflon.
• Free radical and Zeigler Natta polymerization are two different types of polymerizations.
• Free radical polymerization is a method of polymerization in which free radicals are successively added to create a polymer unit.
• It is an instance of coordination, anionic, and cationic chain-growth polymerization.
• Three steps, Initiation, Propagation, and Termination, make up the process of free radical polymerization.
• Elastomers and polystyrene are produced by the process of free radical polymerization.
• While Zeigler Natta polymerization is a type of polymerization with the help of Ziegler Natta catalyst.
• Zeigler Natta catalysts are combinations of chemical compounds employed primarily in the manufacture of alpha-olefin-derived polymers, which are generated from 1-alkenes.
• It is a type of vinyl polymerization reaction.
• High and low-density polyethylene are made using Ziegler-Natta polymerization.
• It results in a low-density, branching polymer containing side chains during free-radical polymerization.
• But in the case of Zeigler Natta polymerization, a more rigid, linear, dense, and tensile polymer with increased density is produced.

Hence, Zeigler Natta polymerization has advantages over free radical polymerization.

#SPJ3