Biodegradability of degradable mulching film in a laboratory-controlled composting test

Abstract

A series of degradable films was prepared, and 2 formulas of polyethylene (PE) films with the highest degradable performance were experimentally determined. These films contained 3.43% and 0.44% stearate, and were denoted as PE-3 and PE-4, respectively. Their biodegradability was studied in a laboratory-controlled composting test using ordinary PE film (OPEF) as a control. Contrast composting experiments indicated that the biodegradability of untreated samples was very low, and that the biodegradation rates of PE films after natural aging were significantly higher. FT-IR analysis showed that OPEF changed little after the composting experiment, and that PE-3 and PE-4 showed a carbonyl absorption peak at 1720 cm −1 , whose intensity increased with increased composting time. Analysis of the viscometric-average molecular weight revealed that it changed little for untreated film but significantly decreased for aged films, especially PE-3, after the composting experiments.

Reinforcement of irradiated waste polyamide/reclaimed rubber powder composites with glass fiber

“…Accordingly, blending with waste rubber is important both from the point of view of disposal of waste and the reduction in the product cost. More attention has been focused on compounding finely ground tire rubber (GRT) with thermoplastics which can be subsequently re-melted and formed into a wide range of molded and extruded products [4][5][6][7][8][9][10][11][12][13].The mechanical properties of such compounds depend upon the modulus and concentration of GRT, polymer matrix type, and adhesion between the GRT and polymer matrix as well as the dispersion and interaction between them [14].…”

Karakterisasi Sifat Mekanik Film Plastik dari Pati Biji Nangka dengan Variasi Nanoserat Pinang

“…Salah satu sumber pati yang bisa dimanfaatkan adalah pati dari biji nangka karena biji nangka memiliki kandungan pati yang tinggi yaitu sebesar 36,7 g dalam 100 g berat biji (Fairus et al, 2010). (Zhang et al, 2013) menyatakan bahwa pembuatan plastik dari bahan pati dapat meningkatkan proses biodegradasi plastik, namun memiliki sifat mekanik cenderung lemah. Maka dari itu dibutuhkan bahan tambahan agar mendukung sifat mekanik film berbasis pati.…”

Promotive Effect of Non-Woven Polylactide/Natural Rubber Composites on Growth and Biochemical Constituents of Purple Basil (Ocimum basilicum L.)

“…As a part of smart farming, it is proposed to use compositions based on polylactide for pre-sowing seed treatment [30], as well as for the production of covering and mulching materials [31,32]. In the research [30], the authors studied the issue of seed encapsulation.…”