Changes in Heat Resistance and Mechanical Properties of Peroxide Cross-Linking HDPE: Effects of Compounding Cross-Linkers DOI Open Access

Shunquan Liu,

Run Zhang,

Chenchao Fu

и другие.

Polymers, Год журнала: 2025, Номер 17(4), С. 535 - 535

Опубликована: Фев. 19, 2025

Due to excellent chemical resistance and impermeability, high-density polyethylene (HDPE) is widely used in petrochemical transportation, product packaging, sports equipment, marine applications. Yet, with the wide variety of service environments, its mechanical thermal properties do not meet demand. In present study, a compounding cross-linker comprising di-tert-butyl peroxide (DTBP) triallyl isocyanurate (TAIC) employed by combining two-step preparation process. High-quality cross-linking reactions are achieved for HDPE. this DTBP first examined separately. A peak degree 74.7% achieved, there large improvement properties. Subsequently, composite system TAIC investigated. The 82.1% (10% increase compared DTBP). heat deformation temperature 80.1 °C (22% impact strength 104.73 kJ/m2 (207% neat HDPE). flexural 33.6 MPa results show that further improves degree, resistance, HDPE, indicating potential application engineering materials high performance.

Язык: Английский

Perspective on the Development of Monomer Recovery Technologies from Plastics Designed to Last DOI Creative Commons
Steffan K. Kristensen, Alexander Ahrens, Bjarke S. Donslund

и другие.

ACS Organic & Inorganic Au, Год журнала: 2024, Номер 4(4), С. 373 - 386

Опубликована: Май 7, 2024

In order to prevent the current unsustainable waste handling of enormous volumes end-of-use organic polymer material sent landfilling or incineration, extensive research efforts have been devoted toward development appropriate solutions for recycling commercial thermoset polymers. The inability such cross-linked polymers be remelted once cured implies that mechanical processes used thermoplastic materials do not translate Moreover, structural diversity within from use different monomers as well fabrication fiber-reinforced composites make these highly challenging. this Perspective, depolymerization strategies are discussed with an emphasis on recent advancements our group recovering building blocks polyurethane (PU) and epoxy-based materials. While two represent largest groups respect production volumes, landscapes classes vastly different. For PU, increased collaboration between academia industry has resulted in major solvolysis, acidolysis, aminolysis, split-phase glycolysis polyol recovery, where several being evaluated further scaling studies. materials, molecular skeleton no obvious target chemical scission. Nevertheless, we recently demonstrated possibility disassembly epoxy bisphenol A (BPA) recovery through catalytic C–O bond cleavage. Furthermore, a base promoted cleavage developed by us others shows tremendous potential BPA Further still required evaluating suitability monomer at industrial scale. Nonetheless, illustrated presented chemistry suggest future could include emphasize energy efficient manner closed-loop recycling.

Язык: Английский

Процитировано

4

Chemical Recycling of Step-Growth Polymers Guided by Le Chatelier’s Principle DOI Creative Commons
Zhiyong Liu, Youwei Ma

ACS Engineering Au, Год журнала: 2024, Номер 4(5), С. 432 - 449

Опубликована: Июль 15, 2024

Although step-growth polymers (SGPs) play a fundamental role in the plastics economy, contributing significantly to various facets of our daily life, their end-of-life management remains inadequately addressed. Chemical recycling SGP wastes, involving depolymerization followed by repolymerization, emerges as promising solution toward achieving circular economy. The SGPs is usually dynamic equilibrium with polymerization reactions, thus falling under system amenable Le Chatelier's principle. This perspective endeavors elucidate interplay between principle and chemical particular emphasis on guidance provided latter process. To this end, we have selected five conventional SGPs, namely, poly(ethylene terephthalate), polyamides, polycarbonates, polyurethanes, polyureas, representatives how alterations temperature, pressure, concentrations products or reactants, catalysts influence process SGPs. Additionally, proposes several potential strategies for applying

Язык: Английский

Процитировано

4

Toward Sustainable Polydienes DOI
Pengfei Wu, Qixuan Hu, Lawal A. Ogunfowora

и другие.

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 17, 2025

The sustainable management of polydiene waste represents a formidable challenge in the realm polymer chemistry, given extensive industrial utilization polydienes due to their superior elastomeric properties. This comprehensive Perspective addresses multifaceted obstacles hindering efficient recycling polydienes, encompassing environmental concerns, technical limitations, and economic disincentives. We systematically dissect influence polydienes' chemical structures on recyclability, tracing evolution disposal practices while assessing current landscape strategies. Our investigation reveals primary challenges associated with recycling, notably energy-intensive nature modification processes detriments prevailing techniques. Furthermore, we critically evaluate existing methodologies─including mechanical energy recovery, recycling─highlighting respective merits, constraints, implications. Pioneering advancements technology, such as topochemical polymerization computational prediction models, are spotlighted for potential revolutionize recycling. Looking forward, delineate an optimistic trajectory management, advocating innovative methods, exploration milder conditions, adoption interdisciplinary approaches bolster efficiency. culminates discussion pivotal role policy frameworks, life cycle assessments, analyses shaping future Through this scholarly examination, aim catalyze further research development efforts aimed at mitigating impact waste, thereby contributing broader objective chemistry.

Язык: Английский

Процитировано

0

Vitrimers for 3D Printing Technology: Current Status and Future Perspectives DOI
Ankit Sharma,

Avtar Chand,

Inderdeep Singh

и другие.

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown

Опубликована: Янв. 27, 2025

Vitrimers are a class of advanced polymeric materials characterized by their dynamic covalent networks, which offer unique properties such as self-healing, reprocessability, and shape memory. The integration vitrimers into 3D printing technologies presents significant advancement in the field additive manufacturing, offering numerous benefits over traditional thermoplastics thermosets. use printing, leverages ability to be cured reformed under specific conditions, exposure light or heat. enable production high-resolution parts that can easily repaired recycled, addressing key environmental concerns associated with polymers. Their nature not only extends life printed components but also reduces waste promotes sustainability enabling recycling materials. Recent developments for have focused on optimizing performance, including enhancing mechanical strength, expanding range printable materials, improving efficiency process. Studies demonstrated achieve impressive high tensile elasticity, thermal stability, making them suitable various applications. continued research development hold promise advancing capabilities providing pathway more sustainable versatile By harnessing vitrimers, industry push boundaries what is possible material design functionality, leading innovative solutions complex engineering challenges. This article provides comprehensive review reported literature explores potential techniques. It offers detailed insight present trends field.

Язык: Английский

Процитировано

0

Changes in Heat Resistance and Mechanical Properties of Peroxide Cross-Linking HDPE: Effects of Compounding Cross-Linkers DOI Open Access

Shunquan Liu,

Run Zhang,

Chenchao Fu

и другие.

Polymers, Год журнала: 2025, Номер 17(4), С. 535 - 535

Опубликована: Фев. 19, 2025

Due to excellent chemical resistance and impermeability, high-density polyethylene (HDPE) is widely used in petrochemical transportation, product packaging, sports equipment, marine applications. Yet, with the wide variety of service environments, its mechanical thermal properties do not meet demand. In present study, a compounding cross-linker comprising di-tert-butyl peroxide (DTBP) triallyl isocyanurate (TAIC) employed by combining two-step preparation process. High-quality cross-linking reactions are achieved for HDPE. this DTBP first examined separately. A peak degree 74.7% achieved, there large improvement properties. Subsequently, composite system TAIC investigated. The 82.1% (10% increase compared DTBP). heat deformation temperature 80.1 °C (22% impact strength 104.73 kJ/m2 (207% neat HDPE). flexural 33.6 MPa results show that further improves degree, resistance, HDPE, indicating potential application engineering materials high performance.

Язык: Английский

Процитировано

0