ISSN:
0887-624X
Keywords:
alternating copolymerization
;
monomer reactivity ratios
;
propagation rate constant
;
solvent effect
;
electron spin resonance spectroscopy
;
donor-acceptor interaction
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The radical copolymerization of N-(2,6-dimethylphenyl)maleimide (DMPhMI) and 2,4,4-trimethylpentene (TP) was investigated in several solvents at 60°C. The copolymerization rate and the molecular weight of the resulting copolymers were dependent on the kind of solvent used. It was also revealed that the monomer reactivity ratios depended on the solvent; r1 = 0.086 and r2 = 0 in chloroform and r1 = 0.25 and r2 = 0 in benzene, where DMPhMI and TP are M1 and M2, respectively. The propagation rate constants were determined for the homopolymerization and copolymerization in chloroform and benzene using electron spin resonance spectroscopy. The homo- and crosspropagation rate constants (k11 and k12, respectively) were revealed to depend on the solvent: k11 is 20 and 37 L/mol·s and k12 is 230 and 150 L/mol·s in chloroform and in benzene, respectively. The interaction between the maleimide moiety and the solvent molecules was discussed based on the acceptivity of the solvents. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 1515-1525, 1997
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
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