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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and Characterization of Bio-Based Thermosetting Resins from Lactic Acid and Glycerol
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Synthesis and Characterization of Bio-Based Thermosetting Resins from Lactic Acid and Glycerol

机译：乳酸和甘油生物基热固性树脂的合成与表征

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摘要

A bio-based thermoset resin has been synthesized from glycerol reacted with lactic acid oligomers of three different chain lengths (n): 3, 7, and 10. Lactic acid was first reacted with glycerol by direct condensation and the resulting branched molecule was then end-functionalized with methacrylic anhydride. The resins were characterized by Fourier-transform infrared spectroscopy (FT-IR), by ~(13)C-NMR spectroscopy to confirm the chemical structure of the resin, and by differential scanning calorimetry and dynamic mechanical thermal analysis (DMTA) to obtain the thermal properties. The resin flow viscosities were also measured using a rheometer with different stress levels for each temperature used, as this is an important characteristic of resins that are intended to be used as a matrix in composite applications. The resin with a chain length of three had better mechanical, thermal, and rheological properties than the resins with chain lengths of seven and 10. Also, its bio-based content of 78% and glass transition temperature of 97℃ makes this resin comparable to commercial unsaturated polyester resins.
机译：由甘油与三种不同链长（n）：3、7和10的乳酸低聚物反应合成了生物基热固性树脂。首先使乳酸与甘油通过直接缩合反应，然后将所得的支链分子终止用甲基丙烯酸酐官能化。通过傅里叶变换红外光谱（FT-IR），〜（13）C-NMR光谱确定树脂的化学结构，并通过差示扫描量热法和动态机械热分析（DMTA）表征树脂。热性能。还使用流变仪在所使用的每种温度下使用具有不同应力水平的流变仪测量了树脂的流动粘度，因为这是旨在用作复合材料应用中的基质的树脂的重要特性。链长为3的树脂比链长为7和10的树脂具有更好的机械，热和流变性能。此外，其生物基含量为78％，玻璃化转变温度为97℃，因此该树脂可与商业不饱和聚酯树脂。

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