Ultraviolet Oxidative Stabilization Effect of the Rare Earth Compound on Polyamide

Ultraviolet Oxidative Stabilization Effect of the Rare Earth Compound on Polyamide
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稀土化合物对聚酰胺的紫外氧化稳定作用

DOI:
10.1080/03602550902994920
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发表时间:
2009-07
影响因子:
--
通讯作者:
--
中科院分区:
化学3区
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--
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研究了稀土硬脂酸盐(RESt)和稀土环氧脂肪酸(REEFA)对聚酰胺(PA6)紫外光氧化稳定性的影响。结果表明,稀土化合物能抑制PA6分子链上羧基浓度的增加、端胺基浓度的降低、凝胶浓度和比浓粘度的增加,延缓PA6在紫外光老化过程中力学性能的下降。与纯PA6相比,添加稀土化合物的PA6样品在紫外波段的吸光度增加,透射率降低,说明稀土化合物对PA6有一定的保护作用。
Rare earth compounds, including rare earth stearate (RESt) and rare earth epoxydised fatty acid (REEFA), were applied for the purpose of further improving the ultraviolet-oxidative stability of polyamide (PA6). The results showed that the rare earth compounds can inhibit the increase of the gel concentration and the reduced viscosity, the formation and the increase of the carboxylic group concentration, and the decrease of the terminal amine group concentration on the molecular chain of PA6, and delay the decrease of the mechanical properties of PA6 during the UV aging. The sample of PA6 with the rare earth compounds had higher absorbance and lower transmittance of ultraviolet band compared with pure PA6, indicating that the rare earth compounds can protect PA6 from ultraviolet degradation.
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