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Influence of the isomeric structures of butyl acrylate on its single-electron t...
Coelho, Jorge F. J.; Carvalho, Erica Y.; Marques, Dina S.; Popov, Anatoliy V.; Percec, Virgil; Gil, M. H.The aim of this work is to the study the influence of the isomer structures of butyl acrylate monomer on the single-electron transfer/degenerative chain transfer mediated living radical polymerization (SET-DTLRP). The kinetic of isobutyl acrylate is determined for the first time by SET-DTLRP in water catalyzed by sodium dithionite. The plots of number-average molecular weight versus conversion and ln([M]0/[M]) ...
Thermal characterization of poly(vinyl chloride) samples prepared by living rad...
Coelho, Jorge F. J.; Simões, P. N.; Mendonça, Patrícia V.; Fonseca, A. C.; Gil, M. H.Poly(vinyl chloride) (PVC) samples were synthesized by a living radical polymerization (LRP) method and compared with commercial PVC prepared by the conventional free radical polymerization (FRP). The differences were assessed, for the first time, in terms of viscosimetry parameters and thermal analysis. The LRP method used to prepare the PVC-LRP samples is the only one available to obtain this polymer free of ...
Synthesis of poly(ethyl acrylate) by single electron transfer-degenerative chai...
Coelho, Jorge F. J.; Carvalho, Erica Y.; Marques, Dina S.; Popov, Anatoliy V.; Percec, Virgil; Gonçalves, Pedro M. F. O.; Gil, M. H.Living radical polymerization of ethyl acrylate was achieved by single-electron-transfer/degenerative-chain transfer mediated living radical polymerization in water catalyzed by sodium dithionite. The plots of number-average molecular weight versus conversion and ln[M]0/[M] versus time are linear, indicating a controlled polymerization. This method leads to the preparation of alpha,omega-di(iodo)poly(ethyl acry...
Synthesis of Poly(lauryl acrylate) by Single-Electron Transfer/Degenerative Cha...
Coelho, Jorge F. J.; Carvalho, Erica Y.; Marques, Dina S.; Popov, Anatoliy V.; Goncalves, Pedro M.; Gil, Maria H.Living radical polymerization of lauryl acrylate was achieved by SET/DTLRP in water catalyzed by sodium dithionite. The work describes the synthesis of a highly hydrophobic and polar monomer in aqueous medium. The plots of versus conversion and ln[M]0/[M] versus time are linear, indicating a controlled polymerization. This method leads to alpha,omega-diiodopoly(lauryl acrylate)s that can be further functionali...
Characterization of suspension poly(vinyl chloride) resins and narrow polystyre...
Coelho, Jorge F. J.; Gonçalves, Pedro M. F. O.; Miranda, Dionísio; Gil, M. H.This work reports the utilization of a multi-detector size chromatography for the characterization of poly(vinyl chloride) (PVC) resins prepared by suspension polymerization in the range of temperatures between 21 and 75 °C. The chromatography equipment offers the possibility of analyzing the samples in terms of their absolute molecular mass using a combination of three detectors (TriSEC): right angle light sca...
Processability and characterization of poly(vinyl chloride)-b-poly(n-butyl acry...
Coelho, Jorge F. J.; Carreira, Mafalda; Gonçalves, Pedro M. O. F.; Popov, Anatoliy V.; Gil, Maria H.This work reports the synthesis and processing of a new flexible material based on PVC produced by living radical polymerization. The synthesis was carried out in a two-step process. In the first step the macroinitiator alpha, omega-di(iodo)poly(butyl acrylate) [alpha, omega-di(iodo)PBA] was synthesized in water by single electron transfer/degenerative chain transfer mediated living radical polymerization (SET-...
Single electron transfer-degenerative chain transfer living radical polymerizat...
Coelho, Jorge F. J.; Silva, Ana M. F. P.; Popov, Anatoliy V.; Percec, Virgil; Abreu, Mariana V.; Gonçalves, Pedro M. O. F; Gil, M. H.Living radical polymerization of n-butyl acrylate was achieved by single electron transfer/degenerative-chain transfer mediated living radical polymerization in water catalyzed by sodium dithionate. The plots of number-average molecular weight versus conversion and ln[M]0/[M] versus time are linear, indicating a controlled polymerization. This methodology leads to the preparation of alpha,omega-di(iodo) poly (b...
Synthesis of poly(vinyl chloride)-b-poly(n-butyl acrylate)-b-poly(vinyl chlorid...
Coelho, Jorge F. J.; Silva, Ana M. F. P.; Popov, Anatoliy V.; Percec, Virgil; Abreu, Mariana V.; Gonçalves, Pedro M. O. F.; Gil, M. H.The synthesis of a block copolymer poly(vinyl chloride)-b-poly(n-butyl acrylate)-b-poly(vinyl chloride) is reported. This new material was synthesized by single-electron-transfer/degenerative-chain-transfer-mediated living radical polymerization (SET-DTLRP) in two steps. First, a bifunctional macroinitiator of alpha,omega-di(iodo)poly (butyl acrylate) [alpha,omega-di(iodo)PBA] was synthesized by SET-DTLRP in wa...
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