Microwave absorption properties of neoprene-based rubber with magnetic fillers and their effect on ozone degradation

Öz

The increasing demand for effective electromagnetic interference (EMI) shielding materials has led to the development of polymer-based composites with tailored microwave absorption properties. In this study, neoprene-based rubber composites were fabricated using various magnetic and dielectric fillers, including carbonyl iron powder (CIP), ferrites, and zinc oxide. The microwave absorption behavior of the samples was evaluated using a vector network analyzer in the 8.2–12.4 GHz frequency range, while ozone-induced degradation was assessed through FTIR spectroscopy and tensile testing. The results revealed that increasing CIP content significantly enhanced the dielectric permittivity and microwave attenuation, with the highest absorption observed in samples containing 66% CIP. Ferrite fillers contributed to improved ozone resistance by stabilizing the rubber matrix during oxidative exposure. Hybrid systems combining CIP and ferrites demonstrated synergistic effects, achieving both high electromagnetic performance and mechanical durability. This dual-functional approach offers promising potential for applications in automotive, aerospace, and electronic systems where EMI shielding and environmental resilience are critical. The study highlights the importance of filler selection and composition optimization in designing advanced rubber composites for multifunctional performance.

Anahtar Kelimeler

• Microwave absorption
• neoprene rubber
• carbonyl iron
• ferrite
• ozone resistance.

Destekleyen Kurum

The author would like to explicit their gratefulness to Kerim ÇOBAN and TUBITAK Marmara Research Centre and Arsan Kauçuk Co. for their collaboration in these studies. This research was presented at the 2nd International Symposium on Characterization, which took place in Turkey in September 2022.

Neopren bazlı kauçuğun mikrodalga soğurma özellikleri ile manyetik dolgu maddeleri ve bunların ozon bozunmasına etkisi

Öz

Yüksek frekanslarda elektromanyetik enerji yayan elektronik cihazların ve radyo frekansı radyasyon kaynaklarının hızla çoğalması, bunların operasyonel güvenilirliklerine ilişkin endişelerin artmasına neden olmuştur. Elektromanyetik (EM) dalga sızıntısı, bu tür cihazların yanlış çalışmasından veya yetersiz korumasından kaynaklanarak, diğer elektronik sistemlerle önemli parazitlere neden olabilir. Bu sorunu hafifletmek için araştırmacılar EM dalga emisyonlarını kontrol altına alabilecek etkili mikrodalga emiciler geliştirmeye odaklanmışlardır. Mikrodalga emici kompozitlerin tasarımında uygun bir polimer matris ve fonksiyonel dolgu maddesinin belirlenmesi çok önemlidir. Tipik olarak, bu tür kompozitler, yüksek dielektrik geçirgenliğe ve manyetik geçirgenliğe sahip dolgu maddeleri ile birleştirilmiş bir dielektrik polimer matrisinden oluşur. Matris, dolgu partiküllerini birbirinden izole ederek absorpsiyon verimliliğini optimize eder. Bu çalışmada, hem manyetik hem de manyetik olmayan dolgu maddeleriyle doldurulmuş neopren kauçuk kompozitlerin mikrodalga soğurma özellikleri değerlendirilmiştir. Ayrıca, bu malzemelerin ozon kaynaklı bozulmaya karşı direnci araştırılmıştır.

Anahtar Kelimeler

• Mikrodalga emilimi
• neopren kauçuk
• karbonil demir
• ferrit

Kaynakça

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