Publication: Effects of the Copolymer Microstructure on the Morphology of Polyethylene-Poly(ethylene-co-α-olefin) Blends
Issued Date
2004-03-15
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ISSN
08876266
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2-s2.0-1542335743
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Polymer Science, Part B: Polymer Physics. Vol.42, No.6 (2004), 965-973
Suggested Citation
Arunee Tabtiang, Noree Phochalam, Richard Venables Effects of the Copolymer Microstructure on the Morphology of Polyethylene-Poly(ethylene-co-α-olefin) Blends. Journal of Polymer Science, Part B: Polymer Physics. Vol.42, No.6 (2004), 965-973. doi:10.1002/polb.10715 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/21282
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Title
Effects of the Copolymer Microstructure on the Morphology of Polyethylene-Poly(ethylene-co-α-olefin) Blends
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Abstract
The effects of the copolymer microstructure on the morphology evolution in polyethylene/poly(ethylene-co-α-olefin) blends were investigated. Microscopy revealed that the melt-phase morphology, inferred from the solid-state morphologies of annealed and quenched samples, was strongly affected by the copolymer structure, that is, the branch content and branch length. Higher molecular weight α-olefin comonomer residues and residue contents in the copolymers led to faster coarsening of the morphology. The molecular weight of the polyethylene and the copolymers affected the coarsening rates of the morphology, principally through its influence on the melt viscosity. The effects of the molecular weight were largely explained by the normalization of the coarsening rate data with respect to the thermal energy and zero-shear-rate viscosity. Thus, the effect of the molecular weight on the compatibility of the blends was much smaller than the effects of the branch length and branch number. © 2004 Wiley Periodicals, Inc.