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The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 19
(2014) pp 257-260
Living Polymerization
Ajay Kumar
Galgotias University, Plot No-2,Sector17A,Yamuna Expressaway, Distt Gautam Budh Nagar,UP, ak.gupta59@rediffmail.com
Received December 27, 2013. Accepted May 13, 2014.
Published: 22 August 2014
Abstract. Synthetic polymers are long chain molecules containing repeat units of monomers. The polymers can be prepared by free radical polymerization, condensation polymerization and by living polymerization. In a living polymerization, the molecular weight is directly proportional to conversion. Living polymerization techniques give the synthetic chemist two particular powerful tools for polymer chain design, the synthesis of block copolymers by sequential addition of monomers and the synthesis of functional ended polymers by appropriate reagents. In the anionic polymerization organic alkali – metal salts are most widely used initiators whereas in cationic polymerization most commonly used catalysts are metal trihalides such as AlCl3 or BF3. The first entirely aqueous living polymerization was catalyzed by metal complexes such as ruthenium biphosphine complexes containing a ruthenium carbon double bond.
Key Words: In the Classroom; organic chemistry; polymers chemistry; living polymerization; architectural of the polymers; anionic polymerization; cationic polymerization; living polymerization catalyzed in water
(*) Corresponding author. (E-mail: ak.gupta59@rediffmail.com)
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