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通过使用不同的分析技术,确定交联和非交联聚乙中的硫化程度

Abdul G Al Lafi¹, Mohammed S Rihawy², Abdul W Allaf³

¹Division of Polymer Chemistry, Department of Chemistry, Atomic Energy Commission, P.O. Box: 6091, Damascus, Syrian Arab Republic.

|January 30, 2025

概括

确定SPEEK等硫化聚合物的硫化度 (DS) 是非常重要的. FTIR光谱学,特别是ATR和NMR校准,提供了一种可靠和多用途的方法,用于在各种样本类型中进行DS评估.

科学领域:

聚合物科学聚合物科学
材料化学材料化学
分析化学分析化学

背景情况:

硫化度 (DS) 是硫化聚合物的关键参数,影响诸如膨胀,导电性和机械强度等性能.
精确的DS测定对于为特定应用量身定制硫聚合物,如硫聚 (乙) (SPEEK) 至关重要.

研究的目的:

评估和比较各种分析技术,以确定非交叉链接和交叉链接SPEEK的DS.
评估每个方法的优点和局限性,以准确有效地量化DS.

主要方法:

定位和反定位的定位和反定位.
福里埃变换红外光谱 (FTIR) 谱学 (使用ATR)
超紫外线 (UV) 光谱学
质子核磁共振 (1H NMR) 光谱学.
热重力测量分析 (TGA)
拉瑟福反向散射 (RBS) 是一种反向散射.
粒子诱导X射线发射 (PIXE) 分析分析
二维相关性光谱学二维相关性光谱学

主要成果:

经典的定位方法是广泛适用的,但由于结,可能会耗时.
对于可溶性样品,UV和1H NMR等光谱方法是有效的,其中1H NMR提供了高精度.
FTIR光谱法,特别是当用ATR增强并使用1H NMR校准时,证明对所有样本类型具有多功能性和有效性.
二维相关性分析进一步提高了FTIR在DS确定中的可靠性.

结论:

FTIR光谱法,特别是与ATR配件相结合并与1H NMR数据校准时,是确定SPEEK的DS的高度可靠和多功能方法.
虽然经典方法有局限性,但光谱技术为DS评估提供了更有效,更准确的替代方案,有助于材料优化.

关键词:

硫化程度的不同.里埃变换红外光谱法红外光谱法离子束分析离子束分析核磁共振光谱学核磁共振光谱学硫化硫化是一种硫化.聚乙 (聚乙) 是一种聚乙.

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