X-ray irradiated LDPE/PP blends with high mechanical and dielectric performance

Alkan U., Kılıç M., Karabul Y., Caglar M., İçelli O., Ozdemir Z.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.135, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 135
  • Publication Date: 2018
  • Doi Number: 10.1002/app.46571
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: blends, dielectric properties, irradiation, mechanical properties, thermoplastics, LOW-DENSITY POLYETHYLENE, GAMMA-RADIATION, THERMAL-PROPERTIES, ELECTRON-BEAM, POLYPROPYLENE, TEMPERATURE
  • Yıldız Technical University Affiliated: Yes


In this study, the influences of polypropylene (PP) additive (varying from 20% to 80% wt) and low dose X-ray irradiation (changing from 25 to 100 Gy) on the mechanical and dielectric properties of low-density polyethylene (LDPE) were investigated. LDPE/PP film blends were prepared by hot press technique. While the highest Young modulus and tensile strength were observed for the 20%LDPE/80%PP blend at 25 Gy X-ray irradiation, the same blend had the highest energy at break and percentage strain at break values for 50 Gy X-ray exposure. These results also indicated a chain scission in the material. The differential scanning calorimetry curves also indicated a chain scission and crosslinking effects in the blends due to X-ray irradiation. Hence, the higher concentration of PP additive and exposure of low dose X-ray resulted in a polymer composite with high mechanical performance. On the other hand, the dielectric investigations revealed that the 25 Gy X-ray irradiated 20%LDPE/80%PP blend may also attract attention for capacitor applications due to its increased static dielectric constant and reduced dielectric loss. (C) 2018 Wiley Periodicals, Inc.