Polyolefins Industry
Derradji Dadache; Farid Rouabah; Zahir Rahem
Abstract
This study demonstrates that quenching and annealing significantly influence the mechanical and thermophysical behavior of low density polyethylene (LDPE). Rapid quenching at temperature of –25 °C enhances ductility by increasing elongation at break, despite reducing thermophysical properties, ...
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This study demonstrates that quenching and annealing significantly influence the mechanical and thermophysical behavior of low density polyethylene (LDPE). Rapid quenching at temperature of –25 °C enhances ductility by increasing elongation at break, despite reducing thermophysical properties, likely due to microstructural refinement. In contrast, post-quenching annealing especially at 100 °C improves thermal conductivity and crystallinity but reduces ductility. The results underscore a tunable balance between thermal and mechanical performance, governed by the interplay of beta (β-) and alpha (α-) relaxation modes during heat treatment. Post-quenching annealing of low density polyethylene LDPE, particularly at 100 °C, significantly enhanced thermal conductivity, diffusivity, and crystallinity, albeit with a trade-off in ductility and increased brittleness. Quenching within the beta (β-) relaxation range promoted maximum ductility, while annealing in the alpha (α-) relaxation range improved thermophysical properties. These findings reveal that precise control of heat treatment conditions enables a tunable balance between mechanical flexibility and thermophysical performance in LDPE
Polyolefins Industry
Anirban Bhar; Akshay Kumar Dey; Deepshikha Datta; Oliva Roy; Soumyadeep Routh; Arindam Mandal; Biswajit Kamila
Abstract
The global packaging industry is primarily influenced by polyolefinic materials, such as polyethylene (PE) and polypropylene (PP), which offer a combination of durability, flexibility, and cost-effectiveness. These materials have transformed modern packaging through their lightweight offerings for food, ...
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The global packaging industry is primarily influenced by polyolefinic materials, such as polyethylene (PE) and polypropylene (PP), which offer a combination of durability, flexibility, and cost-effectiveness. These materials have transformed modern packaging through their lightweight offerings for food, medical, and industrial uses. The widespread employment of non-biodegradable plastics poses substantial challenges in waste management due to their persistent presence and significant contribution to plastic pollution. This review examines the characteristics, applications, and ecological implications of polyolefins, with a particular focus on their importance in packaging. This paper examines recent advancements in biodegradable alternatives and chemical recycling methods, aiming to address the environmental challenges presented by plastic waste. Integrating natural fillers into polyolefin composites can boost biodegradability without compromising functionality. The review highlights the importance of a circular economy approach, which emphasizes sustainable practices for transforming polyolefin waste into valuable resources. This analysis explores the advantages and disadvantages of polyolefins to guide future research and sustainable packaging policy.
Polyolefins Industry
Naeimeh Bahri-Laleh; Mehdi Nekoomanesh-Haghighi; Samahe Sadjadi; Ali Pajouhan
Abstract
Due to easy availability of cheaper raw material and increase in new applications, the use of polyolefins in various industries is becoming a major priority. The Middle East region, on account of its vast oil and gas reserves has, in the last decade or so, been developing many new petrochemical complexes ...
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Due to easy availability of cheaper raw material and increase in new applications, the use of polyolefins in various industries is becoming a major priority. The Middle East region, on account of its vast oil and gas reserves has, in the last decade or so, been developing many new petrochemical complexes with their expansion into colossal polyolefin production capacities. The predictions are that by 2020 the Middle East region will dominate the polyolefin industry as a whole. Furthermore, with proven oil reserves of about 21.7 thousand million tons (4th world ranking) and natural gas of 34.0 trillion cubic meters (1st world ranking), Iran’s petrochemical industry is supported by diverse and abundant feedstock reserves. In line with other polyolefin producers’ developments in the Middle East, Iran's National Petrochemical Company (NPC) has undergone massive structural and technological transformations in the last two decades in order to set up ambitious plans for further capacity increase and native technology developments. This article mainly focuses on Iran today’s position and its future plans in the polyolefins industry.
