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Processing of Thermotropic Fully Aromatic Polyesters by Powder Molding Accompanied by Solid-State Post-Polymerization.

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Title: Processing of Thermotropic Fully Aromatic Polyesters by Powder Molding Accompanied by Solid-State Post-Polymerization.
Authors: Mikhaylov, Pavel A.1 (AUTHOR) pmih@ips.ac.ru, Mityukov, Anton V.1 (AUTHOR), Dudka, Dmitry V.1 (AUTHOR), Golubev, Yaroslav V.1 (AUTHOR), Kulichikhin, Valery G.1 (AUTHOR), Malkin, Alexander Ya.1 (AUTHOR)
Source: Polymers (20734360). May2025, Vol. 17 Issue 10, p1358. 17p.
Subjects: Prepolymers, Liquid crystal states, Manufacturing processes, Injection molding, Titanium dioxide, Polyesters
Abstract: Thermotropic polyesters are a subject of keen interest due to their exceptional heat resistance, thermal stability, and high strength. However, these thermal characteristics pose significant constraints on standard manufacturing processes, as the melting temperatures of these polymers can exceed 300 °C. This study explored the feasibility of manufacturing final items molded from prepolymers through a solid-state polymerization process. A copolymer composed of 4-acetoxybenzoic acid (4ABA), 3-acetoxybenzoic acid (3ABA), and 4′-acetoxybiphenyl-4-carboxylic acid (ABCA) was synthesized using melt polycondensation. To comprehensively evaluate the performance of the resulting material, several sets of samples were prepared, including those containing TiO2. Experimental samples from the pre-polymers were obtained through injection molding followed by high-temperature solid-state post-polymerization. The final products underwent a range of tests, including rheological and mechanical analyses, as well as thermal evaluations. The products demonstrated sufficient strength and stability. The proposed method of solid-state post-condensation offers significant potential advantages for the practical application of manufacturing high-performance engineering materials. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Processing of Thermotropic Fully Aromatic Polyesters by Powder Molding Accompanied by Solid-State Post-Polymerization.
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. May2025, Vol. 17 Issue 10, p1358. 17p.
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  Data: Thermotropic polyesters are a subject of keen interest due to their exceptional heat resistance, thermal stability, and high strength. However, these thermal characteristics pose significant constraints on standard manufacturing processes, as the melting temperatures of these polymers can exceed 300 °C. This study explored the feasibility of manufacturing final items molded from prepolymers through a solid-state polymerization process. A copolymer composed of 4-acetoxybenzoic acid (4ABA), 3-acetoxybenzoic acid (3ABA), and 4′-acetoxybiphenyl-4-carboxylic acid (ABCA) was synthesized using melt polycondensation. To comprehensively evaluate the performance of the resulting material, several sets of samples were prepared, including those containing TiO2. Experimental samples from the pre-polymers were obtained through injection molding followed by high-temperature solid-state post-polymerization. The final products underwent a range of tests, including rheological and mechanical analyses, as well as thermal evaluations. The products demonstrated sufficient strength and stability. The proposed method of solid-state post-condensation offers significant potential advantages for the practical application of manufacturing high-performance engineering materials. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/polym17101358
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        Text: English
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        Type: general
      – SubjectFull: Liquid crystal states
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      – TitleFull: Processing of Thermotropic Fully Aromatic Polyesters by Powder Molding Accompanied by Solid-State Post-Polymerization.
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              Text: May2025
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