Recent Advances in Elongational Flow Dominated Polymer Processing Technologies

Yuan, Zhongke; Chen, Xiaochuan; Yu, Dingshan

doi:10.3390/polym13111792

Cited by 10 publications

(12 citation statements)

References 62 publications

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“…Shear flow exhibits lower energy efficiencies in both dispersive and distributive mixings when compared with those of elongational flow. − Moreover, melt droplets of high-λ-blends are more efficiently broken under an extensional flow field than under a shear flow field. − According to Luciani and Utracki, the higher efficacy of elongational flow field in causing improved dispersion in blends is more significant when λ is 3.8 or higher. In recent years, substantial research, such as the use of extensional mixing elements (EMEs) in single-screw ,, and TSEs, , has been performed on the development of processing equipment that imparts elongational flow.…”

Section: Role Of Rheology In the Development Of The Morphologies Of P...mentioning

confidence: 99%

“…Production of discontinuous fiber-reinforced polymer composites under an extensional flow field leads to lower attrition of fibers as compared to that in the case of fiber processing under a shear flow field. The lower fiber attrition is achieved without compromising the quality of dispersion and distributions of fibers …”

Section: Role Of Rheology In the Development Of The Morphologies Of P...mentioning

confidence: 99%

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Role of Rheology in Morphology Development and Advanced Processing of Thermoplastic Polymer Materials: A Review

Banerjee

Ray

2023

ACS Omega

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This review presents fundamental knowledge and recent advances pertaining to research on the role of rheology in polymer processing, highlights the knowledge gap between the function of rheology in various processing operations and the importance of rheology in the development, characterization, and assessment of the morphologies of polymeric materials, and offers ideas for enhancing the processabilities of polymeric materials in advanced processing operations. Rheology plays a crucial role in the morphological evolution of polymer blends and composites, influencing the type of morphology in the case of blends and the quality of dispersion in the cases of both blends and composites. The rheological characteristics of multiphase polymeric materials provide valuable information on the morphologies of these materials, thereby rendering rheology an important tool for morphological assessment. Although rheology extensively affects the processabilities of polymeric materials in all processing operations, this review focuses on the roles of rheology in film blowing, electrospinning, centrifugal jet spinning, and the three-dimensional printing of polymeric materials, which are advanced processing operations that have gained significant research interest. This review offers a comprehensive overview of the fundamentals of morphology development and the aforementioned processing techniques; moreover, it covers all vital aspects related to the tailoring of the rheological characteristics of polymeric materials for achieving superior morphologies and high processabilities of these materials in advanced processing operations. Thus, this article provides a direction for future advancements in polymer processing. Furthermore, the superiority of elongational flow over shear flow in enhancing the quality of dispersion in multiphase polymeric materials and the role of extensional rheology in the advanced processing operations of these materials, which have rarely been discussed in previous reviews, have been critically analyzed in this review. In summary, this article offers new insights into the use of rheology in material and product development during advanced polymer-processing operations.

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Section: Role Of Rheology In the Development Of The Morphologies Of P...mentioning

confidence: 99%

Section: Role Of Rheology In the Development Of The Morphologies Of P...mentioning

confidence: 99%

Role of Rheology in Morphology Development and Advanced Processing of Thermoplastic Polymer Materials: A Review

Banerjee

Ray

2023

ACS Omega

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“…Thus, it is especially suitable for the processing of biodegradable polymers, which can realize the preparation of high efficiency, low energy consumption and less degradation. 49 For example, Qu et al used the intense and continuous volume elongational flow field provided by eccentric rotor extruder to induce the in situ formation of highly oriented nanofiber structures of thermoplastic polyurethane (TPU) in the PLA matrix. 50 Then, combined the elongational flow field with the annealing process to produce PLA/TPU blends with bone-like structure, in which the TPU nanofibers generated in situ by the elongational flow field are similar to collagen fibers in compact bone.…”

Section: Elongation Rheology Based Polymer Deformation Processing Tec...mentioning

confidence: 99%

“…At present, the main research works carried out by scholars in this field are introduced as below (Figure 1). 32,[42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61]…”

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confidence: 99%

Eco-friendly biodegradable polymers: Sustainable future

Kuang

Esmaeili

Ehsani

2022

Polymers from Renewable Resources

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Polymers are among the most important materials and their applications permeate all areas of production and life. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] They are essential, but they are also often seen as a modern-day scourge, especially in terms of their negative impact on the environment. 17-21 For example, tens of millions of tons of waste plastic particles are discarded into the ocean every year, negatively impacting marine biodiversity 22 ; not to mention the large amounts of fossil fuels used to produce these plastics. The increasingly serious environmental pollution problem has led to a worldwide plastic restriction and ban, and the use of renewable and environmentally friendly biodegradable polymers and its composites is considered to be one of the effective ways to solve this problem. [23][24][25][26][27][28][29][30][31][32] The application of biodegradable polymers and its composites can not only effectively solve the problem of white pollution and reduce the dependence of synthetic polymers on petroleum resources but also help to reduce excessive greenhouse gas emissions and promote the high-value utilization of biomass resources, which is in line with the goal of sustainable development and the core concept of circular economy. [33][34][35][36][37][38] However, the current challenge is that compared with general-purpose plastics and engineering plastics, biodegradable polymers and its composites still have many performance bottlenecks, such as low/limited strength, poor toughness, low modulus, poor heat resistance, and lack of functionality, which greatly limit their application in high value-added and high performance requirements. 39 Therefore, the processing of high-performance biodegradable polymers and its composites has become an important research area in polymer science and technology today.For a biodegradable polymeric materials with known physical properties, morphology control is an important way to achieve high-performance materials without changing the proximal structure, composition, and components of the molecular chain. 40 Traditional polymer processing techniques, such as extrusion, injection molding, blow molding, compression molding and spinning, have mild effects on the morphological structure of polymeric materials. They are not able to significantly

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“…Actually, elongational deformation also occurs in some processes essentially dominated by shear flow, such as extrusion and injection molding [7]; the variation of the flow channels and the entrance in the die section in extrusion, or the injection of the melt into the mold gate, represent some examples in which the melt is subjected to components of elongation flow [8]. Moreover, during the past few decades, plasticizing conveying methods and related devices (such as vane, eccentric rotors extruders and extensional flow mixers) based on elongational flow were continuously developed, demonstrating shorter processing times and higher mixing effectiveness as compared to conventional shear-flow-dominated techniques [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Elongational Flow on the Morphology and Properties of Polymer Systems: A Brief Review

2021

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Polymer-processing operations with dominating elongational flow have a great relevance, especially in several relevant industrial applications. Film blowing, fiber spinning and foaming are some examples in which the polymer melt is subjected to elongational flow during processing. To gain a thorough knowledge of the material-processing behavior, the evaluation of the rheological properties of the polymers experiencing this kind of flow is fundamental. This paper reviews the main achievements regarding the processing-structure-properties relationships of polymer-based materials processed through different operations with dominating elongational flow. In particular, after a brief discussion on the theoretical features associated with the elongational flow and the differences with other flow regimes, the attention is focused on the rheological properties in elongation of the most industrially relevant polymers. Finally, the evolution of the morphology of homogeneous polymers, as well as of multiphase polymer-based systems, such as blends and micro- and nano-composites, subjected to the elongational flow is discussed, highlighting the potential and the unique characteristics of the processing operations based on elongation flow, as compared to their shear-dominated counterparts.

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Recent Advances in Elongational Flow Dominated Polymer Processing Technologies

Cited by 10 publications

References 62 publications

Role of Rheology in Morphology Development and Advanced Processing of Thermoplastic Polymer Materials: A Review

Role of Rheology in Morphology Development and Advanced Processing of Thermoplastic Polymer Materials: A Review

Eco-friendly biodegradable polymers: Sustainable future

Effect of the Elongational Flow on the Morphology and Properties of Polymer Systems: A Brief Review

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