How does the isophthalic unsaturated polyester affect the dielectric properties, the glass transition, and the ductility of bitumen?

Ulutaş H. K., Yakut Ş., Bozoğlu Parto D., Şitilbay B. D., Karaşahin M., Yardım M. S., ...Daha Fazla

ROAD MATERIALS AND PAVEMENT DESIGN, cilt.25, sa.9, ss.1-16, 2023 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Sayı: 9
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1080/14680629.2023.2266527
  • Dergi Adı: ROAD MATERIALS AND PAVEMENT DESIGN
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Compendex, ICONDA Bibliographic, INSPEC
  • Sayfa Sayıları: ss.1-16
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Başlık: İzoftalik doymamış polyester, bitümün dielektrik özelliklerini, cam geçişini ve sünekliğini nasıl etkiler?

Bitumen with 50/70 penetration was prepared and modified by doping with the unsaturated polyester resin based on isophthalic acid at 5% by weight (w/w%).

 

The structural, mechanical, and thermal properties of bitumen and bitumen modified with unsaturated polyester resin %5 (UPR) were determined. The dielectric properties of bitumen and modified bitumen were investigated in the frequency and temperature ranges of 0.1-106 Hz and (-)40°C-40°C, respectively. Polarization mechanisms, glass-transition temperature, and ductility of all samples were determined and compared to each other. The glass transition temperature of the modified bitumen shifts toward low temperatures in comparison to the bitumen. So, it can be suggested that the use of modified bitumen is very attractive in regions where the temperature differences are high. Also, the dielectric analysis method is an innovative alternative to determining modified bitumen’s low-temperature performance. It was found that the modification with UPR provide strength and flexibility to asphalt.


KEYWORDS: AC conductivity; bitumen; bitumen modified with unsaturated polyester resin; dielectric relaxation; glass transition temperature; thickness