Structural changes during cryogenic mechanical milling of iPP/sPS blends

Stranz, Michael; Köster, Uwe

doi:10.1023/b:jmsc.0000039227.56842.56

Cited by 10 publications

(6 citation statements)

References 9 publications

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“…System-level material design flexibility also exists with the introduction of radiation time and intensity, [185][186][187][188] and mechanochemical methods include reactions induced/triggered by milling or ultrasound. [196][197][198]…”

Section: Dual Compatibilization With Different Mechanismmentioning

confidence: 99%

Design of Copolymer‐Based Blend Compatibilizers for Mixed Plastic Recycling

Qian,

Dunn,

Qiang

2023

Macro Chemistry & Physics

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Mixed plastic waste recycling represents a significant challenge as the phase separation of different components dictates downgraded performance. Polymer‐based compatibilizers can offer a promising solution to address this issue, through effectively reducing surface tension and increasing interfacial strength between distinct components to result in improved mechanical and thermal properties of recycled products. This perspective provides an overview of the fundamental concepts for the rational design of copolymer blend compatibilizers and discusses their recent advances, including both preformed and in situ generated systems. Impacts of key material parameters of compatibilizers, such as chain topology, chemical composition, and block sequence on their performance of remediating mixed plastics are discussed. Additionally, reactive compatibilization strategies are also introduced, including in situ formation of polymers, installing functional groups on mixed plastics, and employing dual compatibilization strategies. Looking forward, there are many research and technology opportunities in this area, especially for enabling the use of blend compatibilizers to practically address mixed plastic wastes at scale. Specifically, future compatibilizer design and application should provide strong competitiveness in both cost and energy savings, and carbon emission reduction. Together, the development of blend compatibilizers is an important step in establishing plastic circular economy and creating a more sustainable future.

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Section: Dual Compatibilization With Different Mechanismmentioning

confidence: 99%

Design of Copolymer‐Based Blend Compatibilizers for Mixed Plastic Recycling

Qian,

Dunn,

Qiang

2023

Macro Chemistry & Physics

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“…Cryogrinding is considered as a milestone to mix two immiscible polymers for preparing new materials or combined properties. M. Stranz et al [234] have investigated the mixing of imimicible polymers. Figure 21(a-b) revealed that the morphology of the immiscible syndiotactic polystyrene (sPS) and isotactic polypropylene (iPP) by cryogenic mechanical milling [234]).…”

Section: Polymermentioning

confidence: 99%

Cryomilling as environmentally friendly synthesis route to prepare nanomaterials

Katiyar

Biswas

Tiwary

2020

International Materials Reviews

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The milling of materials at cryogenic temperature has gained importance both in academic as well as the industrial community in the last two decades, primarily because of significant advantages this technique as compared to milling at room temperature; environmental friendly nature, cost-effectiveness, rapid grain refinement, less contamination, and large scale production capability of various nanomaterials. Scientifically, milling at cryo-temperature exhibits several distinct material related phenomena; suppression of recovery and recrystallization, predominant fractures over cold welding, significantly low oxidation, and contamination, leading to rapid grain refinement. Cryomilling has extensively been used to obtain finer scale powder of spices for the preservation of aroma, medicines for effective dissolution, or amorphization. It has been considered an environmentally friendly process as it utilizes benign liquid nitrogen or argon without discharging any toxic entity to the environment, making the process attractive and sustainable. The present review is intended to provide various scientific as well as technological aspects of cryomilling, environmental impact, and future direction.

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“…Esta técnica consiste em uma moagem em moinho de bolas, com elevada energia, por causar repetidos choques entre as partículas do material e os meios de moagem, podendo produzir modificações físicas e/ou químicas na estrutura do material polimérico. [5][6][7][8][9][10] Para a obtenção dos resíduos de pneus na forma de pó foi testada a moagem de alta energia criogênica, utilizando o nitrogênio líquido como meio de refrigeração. Se o sistema estiver a uma temperatura abaixo da Tg do polímero, o processo poderá ocorrer de forma mais efetiva.…”

Section: Introductionunclassified

Caracterização de misturas de peuamm com resíduo de pneu obtidos através de moagem de alta energia

Ruiz

Cintho

Sowek

2020

BJD

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RESUMOCom o crescimento na frota de veículos a quantidade de pneus produzidos e descartados vem crescendo ano após ano e o descarte incorreto tem impactado o meio ambiente. Estudos vêm sendo realizados, apesar da dificuldade, afim de encontrar maneiras de reciclar e/ou reutilizar esse material, pois a estrutura molecular dos pneus possui ligações cruzadas que dificultam o seu reprocessamento. Existem algumas estratégias para a reciclagem de pneus, sendo uma das mais vantajosas o reaproveitamento dos pneus na forma de pó e, posteriormente, a incorporação deste em matrizes poliméricas. Este trabalho teve como objetivo a obtenção de um pó fino de pneu e a sua incorporação em uma matriz de polietileno de ultra alta massa molar (PEUAMM) através da moagem de alta energia. A moagem de alta energia criogênica se mostrou um método muito eficaz para a realização da quebra das partículas do pneu e obtenção destes pós finos e também para a obtenção das misturas. As amostras foram preparadas através de moagem criogênica e na temperatura ambiente e caracterizadas por microscopia eletrônica de varredura (MEV); calorimetria diferencial de varredura (DSC) e por ensaio de tração. A adição do resíduo de pneu afetou negativamente a propriedade mecânica das misturas devido a pobre dispersão observada das partículas. A moagem de alta energia criogênica provocou mudanças no formato das partículas do PEUAMM, de arredondadas para mais achatadas, melhorando a dispersão e promovendo o aumento da resistência mecânica e porcentagem de deformação, quando analisada tanto para o PEUAMM puro quanto para as misturas de PEUAMM com resíduo de pneu. Brazilian Journal of Development Braz. J. of Develop., Curitiba, v. 6, n. 3, p. 9746-9759, mar. 2020. ISSN 2525-8761 9747Palavras-chave: Resíduo de pneu, moagem de alta energia, moagem criogênica, reciclagem. ABSTRACTDue to the growth in the vehicles fleet, the number of tires produced and discarded has been growing year after year and incorrect disposal has impacted the environment. Studies have been carried out, despite the difficulty, in order to find ways to recycle and/or reuse this material, as the molecular structure of the tires has crosslinking that hinder their reprocessing. There are some strategies for recycling tires, one of the most advantageous being the reuse of tires in the form of powder and later incorporating it into polymerics matrixes. This work aimed to obtain a fine tire powder and to incorporate it into an ultra-high molar mass polyethylene (PEUAMM) matrix through high energy milling. High cryogenic energy milling has proved to be a very effective method for breaking the tire particles and obtaining mixtures. The samples were prepared by cryogenic milling and at room temperature and characterized by scanning electron microscopy (SEM); differential scanning calorimetry (DSC) and by tensile test. The addition of the tire residue negatively affected the mechanical properties of the mixtures due to the poor dispersion observed of the particles. High cryogenic energy milling caused ch...

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Structural changes during cryogenic mechanical milling of iPP/sPS blends

Cited by 10 publications

References 9 publications

Design of Copolymer‐Based Blend Compatibilizers for Mixed Plastic Recycling

Design of Copolymer‐Based Blend Compatibilizers for Mixed Plastic Recycling

Cryomilling as environmentally friendly synthesis route to prepare nanomaterials

Caracterização de misturas de peuamm com resíduo de pneu obtidos através de moagem de alta energia

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