改性PLA/PCL生物复合材料的无化/氧化的热和机械性能
Aritz Unamuno Garay1, Alexandra Llidó Barragán1, Santiago Ferrandiz-Bou1
1Department of Mechanical and Materials Engineering, Universitat Politècnica de València (UPV), Plz. Ferrándiz y Carbonell, s/n, 03801 Alcoy, Spain.
Polymers
|September 27, 2025
概括
无酸马氏体 (MA) 接种增强了多乳酸/多乳 (PLA/PCL) 混合物,提高了柔性和抗冲击性. 控制的MA添加优化了这些聚合物系统中的机械和热性能平衡.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 复合材料 复合材料 复合材料
背景情况:
- 聚乳酸 (PLA) 和聚烯酸 (PCL) 是具有互补性质的可生物降解聚合物.
- 提高PLA/PCL混合物的兼容性和性能对于先进的应用至关重要.
- 无氧化 (MA) 是不混合的聚合物混合物的潜在兼容剂.
研究的目的:
- 为了研究在PLA/PCL混合物中对PLA接种的氨酸无水化物 (MA) 的兼容作用.
- 评估不同MA含量对PLA/PCL混合物的热,机械和形态特性的影响.
- 确定最佳的MA度,以提高PLA/PCL系统的性能.
主要方法:
- 使用氧化 (BPO) 启动器来制备与MA (PLA-g-MA) 接种的PLA.
- 制造PLA/PCL混合与不同配方的PLA-g-MA.
- 使用差分扫描热量测量 (DSC),热重力测量分析 (TGA),里埃变形红外光谱 (FTIR),光度测量,扫描电子显微镜 (SEM) 和机械测试 (拉伸,冲击,硬度) 的表征.
主要成果:
- 添加PCL提高了PLA的柔性,但降低了拉伸强度和硬度.
- 增强了相相兼容性,增加了破裂时的延伸和冲击阻力,特别是在1-3%的MA.
- 较高的MA度 (≥5%) 导致异质相分散,从而导致可变的热和机械性能.
- FTIR证实剩余BPO低于0.1phr;TGA显示在5%MA时热稳定性略有改善.
结论:
- 经过控制的胺无水合物接种有效地提高了PLA/PCL混合物的兼容性和性能平衡.
- 中级MA度 (1-3%) 在柔性和抗冲击性方面提供了最显著的改善.
- 需要进一步优化接种和加工条件,以减轻在更高的MA水平上的异质性.
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