Startseite Effect of expansion temperature on the properties of expanded graphite and modified linear low density polyethylene
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Effect of expansion temperature on the properties of expanded graphite and modified linear low density polyethylene

  • Xiuyan Pang EMAIL logo , Wenyu Zhang , Yafang Meng , Meifang Ma und Jianzhong Xu
Veröffentlicht/Copyright: 10. Mai 2022
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International Polymer Processing
Aus der Zeitschrift International Polymer Processing Band 37 Heft 3

Abstract

To study the influence of expansion temperature on the properties of expanded graphite (EBG), EBG300, EBG600, and EBG900 were prepared by heating expandable graphite (EG) at 300, 600, and 900 °C, respectively. Furthermore, the influence of these EBGs on the combustion performance and physical-mechanical properties of linear low density polyethylene (LLDPE) were investigated. The expansion volumes of EBG300, EBG600, and EBG900 increase with the rise of temperature, and a four-stage ordered structure of “graphite worm” gradually forms. The thermal stability increases gradually for EBG300, EBG600, and EBG900. On the contrary, the thermal conductivity decreases in sequence. However, the incorporation of EBG900 promotes the formation of a continuous network structure and makes the modified LLDPE to present the best heat transmission. The addition of 30 wt% of these EBGs significantly improves LLDPE’s flame retardancy and high-temperature thermal stability. The total heat release, the peak value of heat release rate, and the fire growth index of 70LLDPE/30EBG300 reduce by 69, 91, and 87% respectively, while the effective fire performance index improves seven times. The addition of these additives reduces the tensile strength and elongation at break, the larger the EBG size, the more obvious the effect.

Keywords: combustion performance; expandable graphite; expansion temperature; physical mechanical properties; polyethylene
Corresponding author: Xiuyan Pang, College of Chemistry and Environmental Science, Hebei University, Wusi East Road No. 180, Baoding, 071002, P. R. China; and Flame Retardant Material and Processing Technology Engineering Technology Research Center of Hebei Province; Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding, P. R. China, E-mail:

Funding source: Natural Science Foundation of Hebei Province

Award Identifier / Grant number: B2015201028

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This study was supported by project (No. B2015201028) of Natural Science Foundation of Hebei Province, P R China. We gratefully acknowledge the support.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2022-01-04
Accepted: 2022-04-11
Published Online: 2022-05-10
Published in Print: 2022-07-26

© 2022 Walter de Gruyter GmbH, Berlin/Boston

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  4. An experimental study on the role of manufacturing parameters on the dry sliding wear performance of additively manufactured PETG
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https://doi.org/10.1515/ipp-2022-0003
Schlagwörter für diesen Artikel
combustion performance; expandable graphite; expansion temperature; physical mechanical properties; polyethylene

Artikel in diesem Heft

  1. Frontmatter
  2. Research Articles
  3. Predicting the replication fidelity of injection molded solid polymer microneedles
  4. An experimental study on the role of manufacturing parameters on the dry sliding wear performance of additively manufactured PETG
  5. Effect of expansion temperature on the properties of expanded graphite and modified linear low density polyethylene
  6. Thermal, morphological, rheological and deformation under mechanical loading analyses of recycled polyethylene terephthalates
  7. Mung bean protein films incorporated with cumin essential oil: development and characterization
  8. Influence of ammonium octamolybdate on flame retardancy and smoke suppression of PVC matrix flame retardant composites
  9. Rapid Communications
  10. Influence of surface modification on thermal, adhesive properties and impact behavior of TPU films for laminated glass
  11. News
  12. PPS News
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