生物基聚3-基和聚氨混合物:制备,性能评估和结构分析
Beata Krzykowska1, Anna Fajdek-Bieda2, Aneta Jakubus3
1Department of Organic Chemistry, Faculty of Chemistry, Rzeszów University of Technology, Powstańców Warszawy 6, 35-959 Rzeszów, Poland.
Materials (Basel, Switzerland)
|May 14, 2025
概括
这项研究探讨了聚3-基酸 (P3HB) 和聚氨 (PU) 聚合物混合物. 混合物,其重量为10%. %PU表现出最佳的热和机械性能,显示出更好的冲击强度和更轻松的加工.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
背景情况:
- 聚3-基酸盐 (P3HB) 是一种可生物降解的聚合物,具有潜在的应用,但在热和机械性能方面存在局限性.
- 聚氨 (PU) 是一种通用聚合物,以其弹性和性而闻名.
研究的目的:
- 开发和描述P3HB和合成线性PU的聚合物混合物.
- 为了研究不同PU含量 (5,10,15重量) 的影响. %) 关于P3HB的热,机械和表面性能.
- 为了确定最佳的PU组成,以提高材料性能.
主要方法:
- 通过聚乙烯甘醇与4,4'-二甲二酸盐的反应合成线性聚氨 (PU).
- 使用双螺杆挤出机将P3HB和PU混合化.
- 使用差分扫描热度计 (DSC),富里埃转换红外光谱 (FTIR),扫描电子显微镜 (SEM) 和能量分散式X射线分析 (EDX) 的表征.
- 评估机械性能 (抗冲击,硬度,抗拉,柔性) 和表面地形.
主要成果:
- FTIR证实了PU与P3HB矩阵之间的结相互作用.
- 增加PU含量导致改善了表面规律性和均性.
- 与纯P3HB相比,P3HB/PU混合物显示硬度降低,冲击强度提高,破裂时比较大的相对延长.
- DSC表示玻璃过渡,化和结晶温度降低,PU含量增加.
- 混合物,其重量为10%. %PU表现出最好的整体机械和热性能.
结论:
- 加入聚氨显著改变了P3HB的特性.
- 该P3HB/PU混合物含有10重量. %PU提供了改善机械性能,由于点较低而提高加工能力和更好的热稳定性的有希望的平衡.
- 这些发现表明,P3HB/PU混合物在需要增强生物降解性和定制机械特性的应用中具有潜在的潜力.
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