Rheology and Processing of Polymers

Lamnawar, Khalid; Maazouz, Abderrahim

doi:10.3390/polym14122327

Cited by 1 publication

(2 citation statements)

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“…3,4 In polymer processing techniques like extrusion, injection molding, and film formation, melt viscosity plays a vital role in determining the ease of polymer shaping and impacts the mechanical properties of the final product. 5 It requires consideration of not only shear rate and pressure, but also temperature effects on the polymer melt viscosity. 6,7 Furthermore, the viscosity characteristics of polymer melts are intricately linked to their molecular structure and chain dynamics, particularly in terms of molecular weight, molecular weight distribution (PDI), and molecular conformation.…”

Section: Introductionmentioning

confidence: 99%

“…Melt viscosity can be considered as the best thermal stability index in polymer processing and studied by flow resistance 3,4 . In polymer processing techniques like extrusion, injection molding, and film formation, melt viscosity plays a vital role in determining the ease of polymer shaping and impacts the mechanical properties of the final product 5 . It requires consideration of not only shear rate and pressure, but also temperature effects on the polymer melt viscosity 6,7 .…”

Section: Introductionmentioning

confidence: 99%

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Temperature dependence of polymer melt viscosity obtained based on DSC data and the consistency between thermodynamic and kinetic fragility

Fang,

Chen,

Zhou

et al. 2024

J of Applied Polymer Sci

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The viscosity of the polymer melt has an impact on both the processing and properties of the product. However, conventional viscosity measurement methods have limitations such as strict testing conditions, large sample sizes, and long response times. This paper proposes a simplified method that utilizes differential scanning calorimetry to determine the viscosity–temperature relationship of the polymer melt. The research subjects consist of four noncrystalline polymers and five crystalline polymers. A new thermodynamic fragility formula of crystalline polymer is obtained. Additionally, high‐temperature limiting viscosity shows a good linear relationship with fragility. Compared with the traditional viscosity measurement, this method is a simpler and more effective way to model the viscosity of polymer melt and has broad prospects in application.

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