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  1. Crystal and morphology development in immiscible nonpolar polymer blend nanocomposite based on low-density polyethylene and linear low-density polyethylene in presence of clay and compatibilizer

Crystal and morphology development in immiscible nonpolar polymer blend nanocomposite based on low-density polyethylene and linear low-density polyethylene in presence of clay and compatibilizer

Khederlou, K ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1002/vnl.21997
  3. Publisher: John Wiley and Sons Ltd , 2023
  4. Abstract:
  5. In this work, polyolefin-blend/clay nanocomposites based on low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and organically modified clay (OC) were prepared by melt extrusion. Various grades of maleic anhydride (MA) grafted polyethylene (PE-g-MA) were used and examined as compatibilizers in these nanocomposites. Differential scanning calorimetry analysis showed that OC and compatibilizer affect the crystallization behavior of LDPE/LLDPE with different mechanisms. Thermodynamic calculations of wetting coefficient based on interfacial energy between OC, LD, and LL, Morphological characterization based on field emission scanning electron microscopy, X-ray diffraction, small angles X-ray scattering, and dynamic rheology measurements revealed that the compatibilizer and OC were localized at the interface of LDPE and LLDPE phases with a preferred tendency toward one phase. Results demonstrated that at a specific amount of OC, there is an optimum compatibilizer concentration to achieve nanodispersed OC and beyond that the compatibilizer causes a structural change in the polymer crystalline morphology. It was also found that the tensile property enhancement of LDPE/LLDPE/OC nanocomposites is closely related to the crystalline structure development made by incorporation of both OC and compatibilizer. © 2023 Society of Plastics Engineers
  6. Keywords:
  7. Compatibilizer ; Crystalline morphology ; Immiscible polyolefin blend ; Organically modified nanoclay ; Polymer-clay nanocomposite
  8. Source: Journal of Vinyl and Additive Technology ; 2023 ; 10835601 (ISSN)
  9. URL: https://4spepublications.onlinelibrary.wiley.com/doi/10.1002/vnl.21997