Kinetics Study on Melt Grafting Copolymerization of LLDPE with Acid Monomers Using Reactive Extrusion (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Kinetics Study on Melt Grafting Copolymerization of LLDPE with Acid Monomers Using Reactive Extrusion (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

Alternative label

• Shi Q., Zhu L., Cai CL., Yin JH., Costa G. (2006)
  Kinetics Study on Melt Grafting Copolymerization of LLDPE with Acid Monomers Using Reactive Extrusion
  in Journal of applied polymer science (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Shi Q., Zhu L., Cai CL., Yin JH., Costa G. (literal)

Pagina inizio

• 4301 (literal)

Pagina fine

• 4306 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 101 (literal)

Rivista

• Journal of applied polymer science (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Giovanna Costa: CNR Ismac Ge Qiang Shi,Lianchao Zhu, ChuanLun Cai,JingHua Yin: State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy, China of Sciences, Changchun 130022, People’s Republic of China (literal)

Titolo

• Kinetics Study on Melt Grafting Copolymerization of LLDPE with Acid Monomers Using Reactive Extrusion (literal)

Abstract

• ABSTRACT: Graft copolymerization in the molten state is of fundamental importance as a probe of chemical modification and reactive compatibilization. However, few grafting kinetics studies on reactive extrusion were carried out for the difficulties as expected. In this work, the macromolecular peroxide-induced grafting of acrylic acid and methyl methacrylate onto linear low density polyethylene by reactive extrusion was chosen as the model system for the kinetics study; the samples were taken out from the barrel at five ports along screw axis and analyzed by FTIR, 1H NMR, and ESR. For the first time, the time-evolution of reaction rate, the reaction order, and the activation energy of graft copolymerization and homopolymerization in the twin screw extruder were directly obtained. On the basis of these results, the general reaction mechanism was tentatively proposed. It was demonstrated that an amount of chain propagation free radicals could keep alive for several minutes even the peroxides completely decomposed and the addition of monomer to polymeric radicals was the rate-controlled step for the graft copolymerization. The results presented here revealed that the relative importance of graft copolymerization compared with homopolymerization mainly depended on the monomer solubility and reactivity, while the process parameters such as reaction temperature also influenced the reaction tendency. (literal)

Prodotto di

• Istituto per lo studio delle macromolecole (ISMAC) (Istituto)
• Catalisi per nuove architetture macromolecolari e sistemi polimerici nanostrutturati e biomimetici (PM.P02.005.003) (Modulo)

Autore CNR

• GIOVANNA COSTA (Unità di personale interno)

Incoming links:

Prodotto

• Istituto per lo studio delle macromolecole (ISMAC) (Istituto)
• Catalisi per nuove architetture macromolecolari e sistemi polimerici nanostrutturati e biomimetici (PM.P02.005.003) (Modulo)

Autore CNR di

• GIOVANNA COSTA (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Journal of applied polymer science (Rivista)