Binary mixtures of polyethylene and oxidized wax: Dependency of thermal and mechanical properties upon mixing procedure
Abstract
The influence of the preparation procedure on the thermal and mechanical properties of linear low-density polyethylene (LLDPE)- and LDPE-oxidized wax blends was investigated. It was found that mechanically mixed blends show reduced thermal stability as well as ultimate mechanical properties (stress and strain at break) compared to that of extrusion mixed blends. However, the structure of the blend and consequently its thermal and mechanical behavior also depend on the initial morphology of polyethylene. DSC measurements show miscibility up to high wax contents in both blend types, but increasing the amount of wax in LDPE blends induces increasing crystallinity. As a result, the LDPE/wax blends show improved thermal stability of between 20 and 50degreesC at low wax concentrations. Although the elasticity modulus of the blends increases, increasing the amount of wax generally degrades the mechanical properties. The main reason for this is the reduced number of tie chains. Changes in the ...average concentration of tie chains with increasing wax content were calculated and a correlation was made with the ultimate properties of the blends. (C) 2003 Wiley Periodicals, Inc.
Keywords:
blends / differential scanning calorimetry (DSC) / mechanical properties / polyethylene (PE) / thermogravimetric analysis (TGA)Source:
Journal of Applied Polymer Science, 2003, 89, 9, 2446-2456
DOI: 10.1002/app.12466
ISSN: 0021-8995
WoS: 000183814900024
Scopus: 2-s2.0-0038719244
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VinčaTY - JOUR AU - Mtshali, TN AU - Van Sittert, CGCE AU - Đoković, Vladimir AU - Luyt, AS PY - 2003 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2644 AB - The influence of the preparation procedure on the thermal and mechanical properties of linear low-density polyethylene (LLDPE)- and LDPE-oxidized wax blends was investigated. It was found that mechanically mixed blends show reduced thermal stability as well as ultimate mechanical properties (stress and strain at break) compared to that of extrusion mixed blends. However, the structure of the blend and consequently its thermal and mechanical behavior also depend on the initial morphology of polyethylene. DSC measurements show miscibility up to high wax contents in both blend types, but increasing the amount of wax in LDPE blends induces increasing crystallinity. As a result, the LDPE/wax blends show improved thermal stability of between 20 and 50degreesC at low wax concentrations. Although the elasticity modulus of the blends increases, increasing the amount of wax generally degrades the mechanical properties. The main reason for this is the reduced number of tie chains. Changes in the average concentration of tie chains with increasing wax content were calculated and a correlation was made with the ultimate properties of the blends. (C) 2003 Wiley Periodicals, Inc. T2 - Journal of Applied Polymer Science T1 - Binary mixtures of polyethylene and oxidized wax: Dependency of thermal and mechanical properties upon mixing procedure VL - 89 IS - 9 SP - 2446 EP - 2456 DO - 10.1002/app.12466 ER -
@article{ author = "Mtshali, TN and Van Sittert, CGCE and Đoković, Vladimir and Luyt, AS", year = "2003", abstract = "The influence of the preparation procedure on the thermal and mechanical properties of linear low-density polyethylene (LLDPE)- and LDPE-oxidized wax blends was investigated. It was found that mechanically mixed blends show reduced thermal stability as well as ultimate mechanical properties (stress and strain at break) compared to that of extrusion mixed blends. However, the structure of the blend and consequently its thermal and mechanical behavior also depend on the initial morphology of polyethylene. DSC measurements show miscibility up to high wax contents in both blend types, but increasing the amount of wax in LDPE blends induces increasing crystallinity. As a result, the LDPE/wax blends show improved thermal stability of between 20 and 50degreesC at low wax concentrations. Although the elasticity modulus of the blends increases, increasing the amount of wax generally degrades the mechanical properties. The main reason for this is the reduced number of tie chains. Changes in the average concentration of tie chains with increasing wax content were calculated and a correlation was made with the ultimate properties of the blends. (C) 2003 Wiley Periodicals, Inc.", journal = "Journal of Applied Polymer Science", title = "Binary mixtures of polyethylene and oxidized wax: Dependency of thermal and mechanical properties upon mixing procedure", volume = "89", number = "9", pages = "2446-2456", doi = "10.1002/app.12466" }
Mtshali, T., Van Sittert, C., Đoković, V.,& Luyt, A.. (2003). Binary mixtures of polyethylene and oxidized wax: Dependency of thermal and mechanical properties upon mixing procedure. in Journal of Applied Polymer Science, 89(9), 2446-2456. https://doi.org/10.1002/app.12466
Mtshali T, Van Sittert C, Đoković V, Luyt A. Binary mixtures of polyethylene and oxidized wax: Dependency of thermal and mechanical properties upon mixing procedure. in Journal of Applied Polymer Science. 2003;89(9):2446-2456. doi:10.1002/app.12466 .
Mtshali, TN, Van Sittert, CGCE, Đoković, Vladimir, Luyt, AS, "Binary mixtures of polyethylene and oxidized wax: Dependency of thermal and mechanical properties upon mixing procedure" in Journal of Applied Polymer Science, 89, no. 9 (2003):2446-2456, https://doi.org/10.1002/app.12466 . .