[Quantitative analysis of two-component polymer blends (PEG/PE) by infrared spectroscopy]

Area of Science:

• Polymer Science
• Spectroscopy
• Materials Analysis

Context:

• Polyethylene glycol (PEG) and polyethylene (PE) blends are widely used in various applications.
• Accurate quantitative analysis of blend composition is crucial for controlling material properties.
• Traditional methods may face challenges in precisely determining component concentrations in polymer blends.

Purpose:

• To develop and validate a quantitative infrared spectroscopy method for analyzing PEG/PE blends.
• To compare the effectiveness of using mixture peaks versus pure peaks as calibration basis.
• To establish a reliable working curve based on the Beer-Lambert law for blend composition determination.

Summary:

• Infrared spectroscopy was employed for the quantitative analysis of PEG/PE blends.
• The study found that using the absorption peak area ratio of selected mixture peaks is a more reasonable calibration basis than using pure peaks.
• A theoretical equation derived from the Beer-Lambert law was used to create a working curve, enabling the calculation of functional group composition in the blend films.
• It was determined that characteristic crystal peaks are unsuitable for calibration due to crystallization's significant impact on absorption intensity.

Impact:

• Provides a more accurate and reliable method for quantifying PEG/PE blend compositions.
• Enhances the understanding of how spectral features relate to blend composition.
• Facilitates better control over material properties and performance in applications utilizing PEG/PE blends.
• Offers a practical approach for researchers and industries working with polymer blends.