화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.42, No.5, 769-775, September, 2018
DOI10.7317/pk.2018.42.5.769  Export Citation
나노 충전제의 분산을 정량화하기 위한 폴리에틸렌-클레이 나노 복합체의 유전특성 연구
Investigation of Dielectric Properties of Polyethylene-Clay Nanocomposites for Quantifying Nanofiller Dispersion
Saffettin Yıldırım, Kübra Pehlivan, Ali Durmuş1, and Kadir Esmer2, †
  • Physics Department, İstanbul University, 34134, Vezneciler, İstanbul, Turkey
  • 1Chemical Engineering Department, İstanbul University, 34320, Avcılar, İstanbul, Turkey
  • 2Physics Department, Marmara University, 34722, Göztepe, İstanbul, Turkey
E-mail:
This study examined the dielectric properties of linear low density polyethylene (LLDPE)/organo-clay nanocomposites including the same amount of maleic anhydride grafted polyethylene (PE-g-MA) and oxidized polyethylene (OxPE) as compatibilizer at different frequencies (10-1-10+7 Hz) and temperatures (237-373 K). The dielectric constant of natural LLDPE remained constant at around 1.5, depending on the temperature rise and frequency while that of LLDPE-PE-g-MA/clay and LLDPE-OxPE/clay nanocomposites increased up to 4.8 and 2.8, respectively, linearly with increasing temperature. Especially in the low frequency region, a Maxwell-Wagner-Sillars polarization was observed in composite structures with an increase in temperature due to the dipolar effect. It has been concluded that the clay in the polymer matrix was more homogeneously dispersed than OxPE due to the compatibilizing effect of PE-g-MA and that different polarization mechanisms were at play for each compatibilizer.
Keywords:low density polyethylene;composites;nanoparticles;polymers;dielectric properties
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