The all documents that i upload are about physical chemistry, Cheat Sheet of Chemistry

Download The all documents that i upload are about physical chemistry and more Cheat Sheet Chemistry in PDF only on Docsity! 1) 2) 3) Every polymerization reaction proceeds through three steps- Chain initiation Chain propagation Chain termination 1- Chain initiation: This is the first step of polymerization reaction where initiator activate the monomer unit resulting in the formation of active center in monomer unit. As example peroxide, hydro peroxide, peracid are very useful initiator in organic polymerization reaction. MACROMOLECULES Lecture – 4 TOPIC - Kinetics Of Polymerization 1- Chain initiation: This is the first step of polymerization reaction where initiator activate the monomer unit resulting in the formation of active center in monomer unit. As example peroxide, hydro peroxide, peracid are very useful initiator in organic polymerization reaction. Rate of production of free radical or rate of initiation – As we know Rate law depends on the slowest step – which is Rate of propagation So , RATE OF POLYMERIZATION = RATE OF PROPOGATION Rate of polymerization =   ( intermediate ) R – Is unknown A/C to SSA - Rate of change in a concentration of all reactive intermediate are negligibly small . Rate of formation of intermediate = rate of disappearance of intermediate KINETIC CHAIN LENGTH – Denoted by gamma ( ) It explain about a no of repeating unit present in a polymer chain. It is a ratio of a rate of overall step & rate of initiation step.