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Lee, Sang-Young
Energy Soft-Materials Lab (ESML)
Research Interests
  • Soft Materials for Energy Storage/ Conversion Systems

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Effect of compatibilizer on the crystallization, rheological, and tensile properties of LDPE/EVOH blends

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Title
Effect of compatibilizer on the crystallization, rheological, and tensile properties of LDPE/EVOH blends
Author
Lee, Sang-YoungKim, SC
Keywords
Constraint effect; Ethylene vinyl alcohol copolymer (EVOH); Interfacial adhesion; Low-density polyethylene (LDPE); Maleic anhydride-grafted linear low-density polyethylene (LLD-g-MAH); Retarded crystallization
Issue Date
199805
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF APPLIED POLYMER SCIENCE, v.68, no.8, pp.1245 - 1256
Abstract
The effect of the compatibilizer on the crystallization, rheological, and tensile properties of low-density polyethylene (LDPE)/ethylene vinyl alcohol (EVOH)(70/30) blends was investigated. Maleic anhydride-grafted linear low-density polyethylene (LLD-g-MAH) was used as the compatibilizer in various concentrations (from 1 to 12 phr). The interesting effect of compatibilization on the crystallization kinetics of the blends was noted, and the correlation between the morphology and the rheological and tensile properties was also discussed. Morphological analysis showed that the blends exhibited a regular and finer dispersion of the EVOH phase when LLD-g-MAH was added. Nonisothermal crystallization exotherms of the compatibilized LDPE/EVOH blends showed the retarded crystallization of the dispersed EVOH phase, which probably resulted from the constraint effect of the grafted EVOH (EVOH-g-LLD) as well as the size reduction of the EVOH domains. The blends exhibited increased melt viscosity and storage modulus and also enhanced tensile properties with the addition of LLD-g-MAH, which seemed to be attributable to both dispersed particle-size reduction and improved interfacial adhesion.
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DOI
http://dx.doi.org/10.1002/(SICI)1097-4628(19980523)68:8<1245::AID-APP6>3.0.CO;2-D
ISSN
0021-8995
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ECHE_Journal Papers

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