The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers (Articolo in rivista)

Type
Label
  • The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/polb.21384 (literal)
Alternative label
  • Li L., Jinghua Y., Costa G., Stagnaro P. (2008)
    The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers
    in Journal of polymer science. Part B, Polymer physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Li L., Jinghua Y., Costa G., Stagnaro P. (literal)
Pagina inizio
  • 506 (literal)
Pagina fine
  • 515 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 46 (literal)
Rivista
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Costa G., Stagnaro P. ISMAC Genova Li L., Jinghua Y., Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China (literal)
Titolo
  • The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers (literal)
Abstract
  • A method was adopted to fix a series of polymers of PE-b-PEO with different PEO/PE segments on the chains of LLDPE. Maleic anhydride (MA) reacting with hydroxyl group of PE-b-PEO (mPE-b-PEO) was used as the intermediate. The structures of intermediates and graft copolymers were approved by H-1 NMR and FTIR. XPS analysis revealed a great amount of oxygen on the surface of grafted copolymers although the end group of PEO was fixed on the LLDPE chains through MA. Thermal properties of the graft copolymers as determined by differential scanning calorimetry (DSC) showed that PE segments in the grafted monomers could promote the heterogeneous nucleation of the polymer, increase T., and crystal growth rate. While the amorphous PEO segments which attached to the crystalline PE segments in LLDPE, impaired their ability to fit the crystal lattice, and depressed the crystallization of LLDPE backbones. In this study, it was also verified through the dynamic rheological data that increasing M-n of grafted monomers significantly increased the complex viscosity and enhanced the shear-thinning behavior. Long-branched chains formed by grafted monomers enhanced the complex moduli (G' and G '') value and retarded relaxation rate. However, there were little influence on the rheological properties when increasing the amounts of PEO segments (or decreasing PE segments) of grafted monomers with similar molecular weight. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it