以钠酸为基础的聚酯中不同非对映体形成的光谱研究

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization Pub Date : 2022-11-01 DOI:10.1080/1023666X.2022.2112642

Viktoria Kreuzer , Klaus Bretterbauer , Gerhard Buchinger , Lisa Kaiser , Lukas Roiser , Clemens Schwarzinger

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引用次数: 0

摘要

采用不同的二元醇和不同的单体化学计量量进行缩聚制备了钠酸基聚酯。由于酸组分的四个立体中心，在聚酯中可以形成四种非对映体。研究了不同醇的使用及其对聚酯非对映体形成的影响。用一维和二维核磁共振光谱对立体异构体进行了鉴定，揭示了二醇成分对其形成的影响。采用MALDI质谱法和粒径排除色谱法对其进行了进一步的结构解析。二醇的另一个重要影响是对玻璃化转变温度的影响，其范围从- 30°C到40°C。

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Spectroscopic studies on the formation of different diastereomers in polyesters based on nadic acid

Nadic acid-based polyesters were prepared by polycondensation with different diols and different stoichiometry of the monomers. Due to the four stereocenters of the acid component, four diastereomers can form in the polyester. The use of different alcohols and influence on the formation of diastereomers in the polyester was investigated. Identification of the stereoisomers has been done with 1D and 2D NMR spectroscopy, which revealed an influence of the diol component on their formation. Further structural elucidation was done by MALDI mass spectrometry and size exclusion chromatography. Another big influence of the diols was found on the glass transition temperatures, which ranged from −30 °C to 40 °C.

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来源期刊

International Journal of Polymer Analysis and Characterization 化学-高分子科学

CiteScore

3.50

自引率

5.30%

发文量

审稿时长

1.6 months

期刊介绍： The scope of the journal is to publish original contributions and reviews on studies, methodologies, instrumentation, and applications involving the analysis and characterization of polymers and polymeric-based materials, including synthetic polymers, blends, composites, fibers, coatings, supramolecular structures, polysaccharides, and biopolymers. The Journal will accept papers and review articles on the following topics and research areas involving fundamental and applied studies of polymer analysis and characterization: Characterization and analysis of new and existing polymers and polymeric-based materials. Design and evaluation of analytical instrumentation and physical testing equipment. Determination of molecular weight, size, conformation, branching, cross-linking, chemical structure, and sequence distribution. Using separation, spectroscopic, and scattering techniques. Surface characterization of polymeric materials. Measurement of solution and bulk properties and behavior of polymers. Studies involving structure-property-processing relationships, and polymer aging. Analysis of oligomeric materials. Analysis of polymer additives and decomposition products.