Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Effect of Surface Modifying Agents Towards Enhancing Performance of Waste Gypsum Based PBAT Composite

  • Kong, Tae Woong (Department of Materials Engineering and Convergence Technology, ReCAPT, Gyeongsang National University) ;
  • Kim, In Tae (Department of Materials Engineering and Convergence Technology, ReCAPT, Gyeongsang National University) ;
  • Sinha, Tridib Kumar (Department of Materials Engineering and Convergence Technology, ReCAPT, Gyeongsang National University) ;
  • Moon, Junho (Department of Materials Engineering and Convergence Technology, ReCAPT, Gyeongsang National University) ;
  • Kim, Dong Ho (Space-Aeronautics & Advanced Non-Metal Material Center) ;
  • Kim, Inseon (Namhae Chemical Corp.) ;
  • Na, Kwangyong (Namhae Chemical Corp.) ;
  • Kim, Min-Woo (GSFILMS Co., Ltd.) ;
  • Kim, Hye-Lin (GSFILMS Co., Ltd.) ;
  • Hyeong, Taegyeong (Photochems Co., Ltd.) ;
  • Oh, Jeong Seok (Department of Materials Engineering and Convergence Technology, ReCAPT, Gyeongsang National University)
  • Received : 2020.12.03
  • Accepted : 2020.12.20
  • Published : 2020.12.31
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Abstract

Stearic acid (SA), polyethylene glycol (PEG), and malic acid (MA) have been used to modify the surface of waste gypsum to develop corresponding poly (butylene adipate-co-terephthalate) (PBAT) composites. According to the mechanical properties, MA-treated gypsum (MA-gypsum) showed the best performance, whereas SA-gypsum showed the worst performance. In contrast to SA and PEG (having -COOH and -OH as polar functional groups, respectively), the presence of both -OH and -COOH in MA is responsible for the superior surface treatment of gypsum and its better dispersion in the polymer matrix (as revealed by FE-SEM analyses). The presence of long aliphatic chain in SA is supposed to inhibit the dispersion of SA-gypsum. Further, the performance of MA-gypsum/PBAT was enhanced by adding polylactic acid (PLA). The maximum optimized contents of MA-gypsum and PLA are 20 and 7.5 wt% for developing a high-performance PBAT composite.

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References

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