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Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   May-June 2003 , Volume 12 , Number 3; Page(s) 191 To 199.
 
Paper: 

A KINETIC INVESTIGATION ON HIGH CONVERSION COPOLYMERIZATION OF LAURYL METHACRYLATE-ISOBUTYL METHACRYLATE IN SOLUTION

 
 
Author(s):  HABIBI A., SADAGHIANI K., VASHEGHANI FARAAHANI E.*, SEMSARZADEH M.A.
 
* CHEMICAL ENGINEERING DEPARTMENT, TARBIAT MODARRES UNIVERSITY,TEHRAN, I.R. IRAN
 
Abstract: 

Copolymers of isobutylmethacrylate (i-BMA), and laurylmethacrylate (LMA), were prepared by solution free radical copolymerizations at 70°C using 2,2¢–azobisisobutyronitrile (AIBN), as initiator. The synthesis of these copolymers were investigated over a wide composition and conversion ranges. Copolymer compositions were determined as a function of conversion from the %C, %H, %O contents of copolymer by elemental analysis. In order to avoid the complications of copolymerization kinetics, the “pseudokinetic rate constant method” (PKRC) was applied to constant and variable volume polymerization system. Theoretical values of coupled parameter Kp/Kt0.5 calculated from the “implicit penultimate unit effect” model (IPUE) based on instantaneous monomer feed composition, determined from Meyer-Lowery integrated copolymer composition equation. The results were compared with experimentally determined kinetic parameters

 
Keyword(s): COPOLYMERIZATION, METHACRYLATES, KINETIC PARAMETER ESTIMATION, HIGH CONVERSION, IMPLICIT PENULTIMATE UNIT EFFECT
 
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