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The polymerisation kinetics of lower dialkyl itaconates
Author(s) -
Tomić Simonida Lj.,
Filipović Jovanka M.,
Velic�ković Jovan S.,
Katsikas Lynne,
Popović Ivanka G.
Publication year - 1999
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19991001)200:10<2421::aid-macp2421>3.0.co;2-e
Subject(s) - chemistry , polymerization , monomer , substituent , polymer chemistry , kinetics , alkyl , reaction rate constant , radical polymerization , methacrylic acid , bulk polymerization , degree of polymerization , chain transfer , organic chemistry , polymer , physics , quantum mechanics
The free radical polymerisation kinetics of diethyl‐ (DEI), dipropyl‐ (DnPI), dibutyl‐ (DnBI), and dihexyl itaconate (DHI) in the bulk were studied in the temperature range from 50 to 70°C. The concentration of the initiator, 2,2′‐azoisobutyronitrile (AIBN), was varied between 0.02 and 0.085 mol/dm 3 . The rate of polymerisation (R p ) , degree of polymerisation (DP) , overall polymerization rate constant ( K ), the ratio of the propagation and termination rate constants ( k p /k t 1/2 ), as well as the chain transfer constant to monomer ( C M ) were determined. The values of R p , K , and k p /k t 1/ 2 of the investigated monomers all increase with increasing size of the alkyl group in the ester substituent, whereas C M decreases when going from the dimethyl to the dihexyl ester. The values of C M are larger than the corresponding values for the alkyl esters of methacrylic acid.