Shaibur Molla Rahman, Sarwar Sabiha, Ambade Balram
Laboratory of Environmental Chemistry, Department of Environmental Science and Technology, Faculty of Applied Science and Technology, Jashore University of Science and Technology, Jashore-7408, Bangladesh.
Department of Chemistry, National Institute of Technology, Jamshedpur 831014, India.
Heliyon. 2024 Jul 11;10(15):e34471. doi: 10.1016/j.heliyon.2024.e34471. eCollection 2024 Aug 15.
Bangladesh produces massive amounts of plastic products to meet the huge population demand. Jashore (Bangladesh) is well-known for discarding huge numbers of plastic caps (PCs). PCs are made up of hard polymer of polypropylene (PP) and high-density polyethylene (HDPE). Jashore was chosen as the study area because huge quantities of PCs are produced here and plastic rope (PR) is prepared using PCs. About 70 % of PCs came from drinking items, 20 % from toiletries items, 7 % from kitchen items, and rest 3 % from unidentified sectors. About 44.0 % of caps were blue, 35.0 % were red, 11.0 % were green, 5.0 % were yellow, 3.0 % were white, and 2.0 % were ash color. About 52 % of caps were prone to damage, 26.0 % were discolored, 15.0 % were slightly damaged, and about 7.0 % were intake. Additionally, different types of ropes (ash color; red color; yellow color, white color, blue color, rasmi, nylon, cotton, jute, and polyester rope) were collected and some mechanical characterization were performed to determine their sustainability. The internal structure of the ash, red, and yellow color PC rope, silk, jute, and cotton rope did not have any structural deformation, but the blue color rope, nylon, and polyester showed a wide range of structural deformation. Tensile strength (TS) was determined using a Universal Testing Machine (UTM), the internal structure was determined using Scanning Electron Microscopy (SEM), and chemical characterization was determined using Fourier Transform Infrared Spectroscopy (FTIR). The characteristics of PR were compared with the characteristics of other ropes. The highest strength was in silky (5315 Mpa) and nylon (2461.5) ropes. FTIR results showed that the chemical structure of C[bond, double bond]O stretching was in 1800 cm, and O[bond, double bond]C[bond, double bond]O stretching was in 2349 cm spectrum in PC samples. It can be said that the strength could be dependent on the chemical composition of the ropes.
孟加拉国生产大量塑料制品以满足庞大人口的需求。贾索尔（孟加拉国）以丢弃大量塑料瓶盖（PC）而闻名。塑料瓶盖由聚丙烯（PP）和高密度聚乙烯（HDPE）的硬质聚合物制成。选择贾索尔作为研究区域是因为这里生产大量塑料瓶盖，并且使用塑料瓶盖制备塑料绳（PR）。大约70%的塑料瓶盖来自饮品，20%来自洗漱用品，7%来自厨房用品，其余3%来自不明领域。大约44.0%的瓶盖是蓝色，35.0%是红色，11.0%是绿色，5.0%是黄色，3.0%是白色，2.0%是灰色。大约52%的瓶盖容易损坏，26.0%变色，15.0%轻微损坏，大约7.0%被摄取。此外，收集了不同类型的绳子（灰色、红色、黄色、白色、蓝色、拉斯米绳、尼龙绳、棉绳、黄麻绳和聚酯绳）并进行了一些力学表征以确定它们的可持续性。灰色、红色和黄色塑料瓶盖绳、丝绸、黄麻和棉绳的内部结构没有任何结构变形，但蓝色绳、尼龙和聚酯显示出广泛的结构变形。使用万能试验机（UTM）测定拉伸强度（TS），使用扫描电子显微镜（SEM）测定内部结构，使用傅里叶变换红外光谱（FTIR）进行化学表征。将塑料绳的特性与其他绳子的特性进行了比较。强度最高的是丝绸绳（5315 Mpa）和尼龙绳（2461.5）。FTIR结果表明，在塑料瓶盖样品中，C=O伸缩振动的化学结构在1800 cm，O=C=O伸缩振动在2349 cm光谱处。可以说强度可能取决于绳子的化学成分。
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