Controlled migration of antifog additives from LLDPE compatibilized with LLDPE grafted maleic anhydride

Koranit Shlosman, Ran Y. Suckeveriene, Jasmine Rosen-Kligvasser, Roza Tchoudakov, Evgeni Zelikman, Raphael Semiat, Moshe Narkis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

This paper summarizes a study of controlled migration of an antifog (AF) additive; sorbitan monooleate (SMO), from linear low density polyethylene (LLDPE) films containing a compatibilizer, LLDPE grafted maleic anhydride (LLDPE-g-MA). LLDPE/LLDPE-g-MA/SMO blends were prepared by melt compounding. Bulk and surface properties of compression molded LLDPE films containing SMO and LLDPE-g-MA were characterized using Fourier transform infrared spectroscopy and contact angle measurements. Thermal properties were investigated using a thermal gravimetric analyzer. Diffusion coefficient (D) was calculated, and AF properties were characterized using a “hot fog” test. Compression molded films were characterized for their morphology using high-resolution scanning electron microscopy, and rheological properties were measured using a parallel-plate rotational rheometer. It was found that the LLDPE/LLDPE-g-MA/SMO systems are characterized by a slower SMO migration rate, a lower diffusion coefficient, and lower contact angle values compared with LLDPE/SMO blends. These results are well correlated with results of a hot fog test. Morphological studies revealed a very fine dispersion of SMO in the LLDPE films, when 3 phr LLDPE-g-MA was combined with 1 phr SMO. Thermal analysis results show that the incorporation of 3 phr LLDPE-g-MA and 1 phr SMO significantly increases the decomposition temperature of the blend at T>400° C. At high shear rates, the LLDPE blends show that the AF and the compatibilizer have a lubrication effect on LLDPE.

Original languageEnglish
Pages (from-to)1484-1491
Number of pages8
JournalPolymers for Advanced Technologies
Volume25
Issue number12
DOIs
StatePublished - 1 Dec 2014
Externally publishedYes

Keywords

  • Antifog
  • Compatibilization
  • Controlled migration
  • FTIR
  • LLDPE

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