Article

Polymer Bulletin

, Volume 54, Issue 1, pp 75-84

Rheology, Morphology and Estimation of Interfacial Tension of LDPE/EVA and HDPE/EVA Blends

  • H.A. KhonakdarAffiliated withDepartment of Polymer Processing, Iran Polymer and Petrochemical Institute (IPPI) Email author 
  • , S.H. JafariAffiliated withDepartment of Chemical Engineering, Faculty of Engineering, University of TehranLeibniz Institute of Polymer Research Dresden
  • , A. YavariAffiliated withDepartment of Chemical Engineering, Faculty of Engineering, University of Tehran
  • , A. AsadinezhadAffiliated withDepartment of Chemical Engineering, Faculty of Engineering, University of Tehran
  • , U. WagenknechtAffiliated withLeibniz Institute of Polymer Research Dresden

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Summary

Rheological characteristics and morphology of low-density polyethylene (LDPE) /ethylene vinyl acetate copolymer (EVA) and high-density polyethylene (HDPE)/EVA blends were compared. Morphological examinations clearly reveal a two-phase morphology in which the LDPE/EVA blends have smaller dispersed domain size than HDPE/EVA Furthermore, LDPE/EVA shows a finely interconnected morphology at 50wt% of EVA while HDPE/EVA exhibits a coarse co-continuous morphology at the same composition. The morphological observations can be attributed to the lower viscosity ratio and lower interfacial tension in the LDPE/EVA system. The Palierne model also successfully fits to the experimental data giving higher values for interfacial tension of HDPE/EVA system as compared to LDPE/EVA.