Growth Homopolymerizations

The initiator types used in ehain-growth polymerizations are radieal formers, carboanionies, carboeationies, or eomplex-forming agents. The resulting polymerizations are either radical, anionic, cationic, or 

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When an extruder is working under steady-state conditions several factors can influence the process. The primary parameters that in principle can be controlled externally are the screw speed, the throughput, the barrel temperature, and the die resistance. All other parameters are influenced by the changes in the primary variables, e.g., filled length, heat transfer, and pressure gradient, or are predetermined, e.g., screw geometry or material properties. 

Apart from the residence time the temperature has also an important influence on the progress of the reaction and on the final product properties. 

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Random Step Growth Homopolymerization of a Bifunctional Monomer... 

Step Growth Homopolymerization Mechanism and Kinetics Here any two growing chains can react with each other. The propagation mechanism is an infinite set of reactions ... 

Historically, polymerization problems were initially treated using statistical methods. This is because they have the advantage of simplicity when dealing with simple polymerization problems. In using such approaches, a certain amount of intuition is necessary. For example, consider the case of a step-growth homopolymerization of a, co-amino-caproic acid to make nylon 6. This reaction can be schematically represented by... 

Simple AB step-growth homopolymerization AB homopolymerization is shown below ... 

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