CIFICEN   24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Thermal decomposition reaction of pinacolone diperoxide: its use as radical initiator in the styrene polymerization
Autor/es:
G. N. EYLER; A. CAÑIZO; M. ASTESUAIN; G. BARRETO; A. BRANDOLIN; C. MINELLONO; G MORALES
Revista:
POLYMER BULLETIN
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2017 vol. 74 p. 3545 - 3545
ISSN:
0170-0839
Resumen:
Some commercial vinyl polymers such as polystyrene, polymethylmethacrylateand polyvinyl chloride have been synthetized through last years usingnew initiators, for example those with multiple active sites. Multifunctional initiatorsin radical polymerization of vinyl monomers allow us to obtain differentbehaviours during the process and changes in the properties of the final products. Inthis work, the kinetic study of the thermal decomposition of cyclic pinacolonediperoxide (PDP) in ethylbenzene and its use in the initiation step of the bulk freeradical polymerization of styrene is reported. The activation parameters for thethermal decomposition reaction of PDP in styrene were worked out from Eyringequation (DH = 26.0 ± 1.2 kcal mol-1; DS = -9.5 ± 3.0 cal mol-1 K-1). Inaddition, the evolution of molecular weights during polymerization was studied
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