Engineering the microstructure: unveiling the synergistic effects of GnP and blowing agents on PA6 composite foams


ULUTAŞ E., TAŞDEMİR M.

Materials Today Communications, cilt.41, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 41
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.mtcomm.2024.110995
  • Dergi Adı: Materials Today Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Anahtar Kelimeler: Chemical foaming method, Foaming agent, Graphene nanoplatelet, Injection molding, Polyamide, Polymer foam
  • Marmara Üniversitesi Adresli: Evet

Özet

With the rapid evolution of modern society, issues such as the excessive consumption of resources and environmental pollution are significantly constraining the progress of the manufacturing industry. In response to these challenges, concepts like energy conservation, emission reduction, and sustainable development have driven the development of polymer foam materials. This study focuses on the development of PA6/GnP polymer composite foams aimed at achieving material and energy savings while enhancing mechanical properties. In the first phase of the research, GnP was added to the PA6 matrix material at weight percentages of 1 %, 2 %, and 3 %, and the mixture was melt-compounded using a twin-screw extruder. The polymer composites were subsequently molded using an injection molding machine, and foams containing 3 wt% GnP were produced to investigate the effect of the maximum GnP content on the properties of the foams. In the second phase of the study, the blowing agent content in the PA6/GnP polymer composites was varied (3 %, 6 %, and 9 %) to produce foams using an injection molding machine. To assess the effect of GnP on foam formation, foams were also produced from neat PA6 using the same amounts of blowing agents. The addition of GnP generally reduced pore sizes, and by increasing the foaming agent amount, the negative effects of GnP's high surface area were balanced. As a result, a more successful pore structure was achieved. In PA6 foams, the expansion ratio increased from 1.06 to 1.13 and 1.26 with rising CBA content, while in PA6/GnP composite foams, the ratios were 1.01 and 1.02.