Identification of biodegradable plastics using differential scanning calorimetry and carbon composition with chemometrics

• DOI: 10.1016/j.hazadv.2023.100260
• Publication Date: 2023-02-15T09:18:56Z
• Authors: Menglin Zhang; Yongzhi Zhang; Chunlin Li; Nie Jing; Shengzhi Shao; Fang Wang; Hanyi Mei; Karyne M. Rogers; Xiangdong Kong; Yuwei Yuan
• Keywords: High-density polyethylene; Low-density polyethylene; Adipate; Polylactic Acid; Biodegradable plastic; Biodegradable polymer

Biodegradable plastics have become an important commodity to replace non-degradable and alleviate environment pollution. It is identify instances of counterfeit mislabeled biodegradable in the marketplace avoid sustainability fraud improve waste recycling. In this study, differential scanning calorimetry (DSC) elemental analyzer-isotope ratio mass spectrometry (EA-IRMS) were used analyze (polylactic acid (PLA), poly butylene adipate-co-terephthalate (PBAT), PBAT/PLA blend (PBAT+PLA)) (polyethylene terephthalate (PET), high density polyethylene (HDPE), low (LDPE), polypropylene (PP)). A verification model was built using orthogonal partial least squares-discriminant analysis (OPLS-DA). Results showed that melting point ranged from 120 °C 176 105 253 °C, respectively. The points PLA PP overlapped. δ13C values -25.8 ‰ -11.6 -32.3 -25.4 ‰, % C 36.0% 61.0% 56.4% 85.3%, Three OPLS-DA models established by combining DSC variables, C. discriminant accuracy these 100%, suggesting approach holds promise for regulation identification marketplace.