Study on the volatilization behavior of monomer and oligomers in polyamide-6 melt by dynamic film–forming device
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Xia Zhu
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Luoxin Wang
Abstract
In this study, a modified torque rheometer is used to investigate the volatilization behavior of monomer and oligomers in polyamide-6 (PA6) melt under dynamic film–forming conditions with negative pressure. The surface renewal model is employed to simulate the volatilization behavior. The effects of actual processing factors and simulation results on the volatilization behavior of monomer and oligomer are analyzed comparatively. It is found that the monomer and oligomers removal rate increase continuously with increasing temperature, residence time, and rotational speed. And, the cyclic dimer, which is extremely harmful to spinning, can be removed. It is found that the removal of monomer and oligomers continued to increase with increasing temperature, residence time, and spinning speed. Moreover, cyclic dimers, which are extremely harmful to spinning, are also removed. Additionally, it is discovered that the polycondensation reaction of PA6 results in an increase in the molecular weight and viscosity at lower temperatures (250 °C), while a higher temperature (270 °C) and shear rate (150 r/min) cause a reduction in viscosity and molecular weight.
Funding source: Sichuan Province Key Research Projects
Award Identifier / Grant number: 2023YFG0345
Funding source: State Key Laboratory of Solid Waste Reuse for Building Materials
Award Identifier / Grant number: SWR-2022-008
Funding source: China National Textile and Apparel Council Application Fundamental Research Project
Award Identifier / Grant number: J202101
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Research ethics: Not applicable.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Competing interests: The authors declare no conflicts of interest.
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Research funding: This work was supported by China National Textile and Apparel Council Application Fundamental Research Project (J202101), State Key Laboratory of Solid Waste Reuse for Building Materials (SWR-2022-008), and Sichuan Province Key Research Projects (2023YFG0345).
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Data availability: The authors confirm that the data supporting the findings of this study are available within the article.
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© 2023 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Material Properties
- Effect of super critical carbon dioxide and alkali treatment on oxygen barrier properties of thermoplastic starch/poly(vinyl alcohol) films
- Promoting antibacterial activity of polyurethane blend films by regulating surface-enrichment of SiO2 bactericidal agent
- Improving anti-aging performance of terminal blend rubberized bitumen by using graft activated crumb rubber
- An experimental investigation of flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites
- Preparation and properties of ABS/BNNS composites with high thermal conductivity for FDM
- Development of a high-strength carrageenan fiber with a small amount of aluminum ions pre-crosslinked in spinning solution
- Development and characterization of new formulation of biodegradable emulsified film based on polysaccharides blend and microcrystalline wax
- Study on the volatilization behavior of monomer and oligomers in polyamide-6 melt by dynamic film–forming device
- Engineering and Processing
- Numerical simulation on the mixing behavior of double-wave screw under speed sinusoidal pulsating enhancement induced by differential drive
- Numerical and experimental studies on the influence of gas pressure on particle size during gas-assisted extrusion of tubes with embedded antibacterial particles
Artikel in diesem Heft
- Frontmatter
- Material Properties
- Effect of super critical carbon dioxide and alkali treatment on oxygen barrier properties of thermoplastic starch/poly(vinyl alcohol) films
- Promoting antibacterial activity of polyurethane blend films by regulating surface-enrichment of SiO2 bactericidal agent
- Improving anti-aging performance of terminal blend rubberized bitumen by using graft activated crumb rubber
- An experimental investigation of flame retardancy and thermal stability of treated and untreated kenaf fiber reinforced epoxy composites
- Preparation and properties of ABS/BNNS composites with high thermal conductivity for FDM
- Development of a high-strength carrageenan fiber with a small amount of aluminum ions pre-crosslinked in spinning solution
- Development and characterization of new formulation of biodegradable emulsified film based on polysaccharides blend and microcrystalline wax
- Study on the volatilization behavior of monomer and oligomers in polyamide-6 melt by dynamic film–forming device
- Engineering and Processing
- Numerical simulation on the mixing behavior of double-wave screw under speed sinusoidal pulsating enhancement induced by differential drive
- Numerical and experimental studies on the influence of gas pressure on particle size during gas-assisted extrusion of tubes with embedded antibacterial particles
