Rheology, morphology and estimation of interfacial tension of LDPE/EVA and HDPE/EVA blends
Polymer Bulletin, 2005•Springer
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 …
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 …
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.
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