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臭氧对非织造聚酸/天然纤维的影响
Yulia V Tertyshnaya1,2, Svetlana G Karpova1, Maria V Podzorova1,2
1Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Str., 119334 Moscow, Russia.
Polymers
|August 14, 2025
概括
臭氧暴露会降解聚酸/天然 (PLA/NR) 纤维,增加结晶性和融化流量. 化学分析揭示了结构变化,表明降解在这些聚合物复合材料中占主导地位.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 表面科学是一门学科.
背景情况:
- 臭氧是一种强烈的氧化剂,会影响聚合物复合材料.
- 了解臭氧对聚合物结构的影响对于材料耐用性至关重要.
研究的目的:
- 为了研究臭氧氧化对非织物聚酸/天然 (PLA/NR) 纤维的影响.
- 量化物理化学性质和化学结构的变化.
主要方法:
- 在800分钟内,PLA/NR纤维的臭氧氧化 (5,10,15% NR)
- 物理化学分析包括差异扫描热度计 (DSC),流速 (MFR),电子磁共振 (EPR) 和里埃变换红外光谱 (FTIR).
主要成果:
- 在PLA/NR纤维中观察到的视觉颜色变化.
- DSC显示玻璃过渡和冷结晶温度下降,结晶度增加.
- MFR增加了1.5-1.6倍,EPR显示相关性时间减少,表明降解主导.
- FTIR揭示了以太债券强度的变化和新的带,表明C=C债券形成.
结论:
- 臭氧氧化显著改变了PLA/NR纤维的结构和特性.
- 在测试条件下,降解是超越交叉连接的主要过程.
- 这项研究提供了关于PLA/NR复合材料氧化稳定的见解.
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