How to determine polyester epoxy content in drybend?

  • Thread starter Thread starter doolue
  • Start date Start date
  • Tags Tags
    Epoxy
Click For Summary
SUMMARY

The discussion focuses on determining the polyester epoxy content in a powder dry-bend mixture using Fourier Transform Infrared Spectroscopy (FTIR). It highlights that fillers and pigments can interfere with IR analytical wavelengths, particularly mentioning the effects of carbon black and titanium dioxide. To accurately analyze the polyester content, it is essential to create standards with known weight percentages of polyester and obtain FTIR spectra. The peak ratio method is recommended to minimize variation in film thickness, requiring the preparation of thin films between 1 to 3 microns using a 20-ton press with heated platens.

PREREQUISITES
  • Fourier Transform Infrared Spectroscopy (FTIR) knowledge
  • Understanding of Beer's Law for quantitative analysis
  • Experience in preparing thin films for spectroscopic analysis
  • Familiarity with the effects of fillers and pigments on FTIR results
NEXT STEPS
  • Research FTIR techniques for analyzing complex mixtures
  • Learn about preparing standards for FTIR analysis
  • Study the peak ratio method for quantifying polymer content
  • Investigate the impact of various pigments on IR spectra
USEFUL FOR

Chemists, materials scientists, and quality control professionals involved in polymer analysis and formulation development will benefit from this discussion.

doolue
Messages
6
Reaction score
0
I have a powder dry-bend mixed from polyester epoxy resin, fillers, pigment, other additives... I'm seeking for a method to analyze percentage weight of polyester epoxy content in this powder. So, could you prove an appropriate method to do it?

Thanks
 
doolue said:
I have a powder dry-bend mixed from polyester epoxy resin, fillers, pigment, other additives... I'm seeking for a method to analyze percentage weight of polyester epoxy content in this powder. So, could you prove an appropriate method to do it?

Thanks

FTIR is a good technique, but fillers and pigments can interfere with IR analytical wavelengths. Organic pigments or inorganic pigments? What kind of UV stabilizers or antioxidants are present? Carbon black kills IR spectra. Titanium dioxide blocks out a good portion of the region. Most organic pigments will have functional groups similar to polyester. However, if the other ingredients don't interfere, make standards with known wt% of polyester. Obtain FTIR spectra and use a a good Beer's law routine for quant. Use the peak ratio method to reduce variation in film thickness (you have to make thin films 1 - 3 micron for analysis). You will need a 20 ton press with heated platens for the thin films.
 

Similar threads

Exploring End-Use Applications for recycled HDPE from used oil containers
  • · Replies 2 ·
Replies
2
Views
2K
Attempting to spin-cast parabola
  • · Replies 4 ·
Replies
4
Views
5K
Looking to learn how infrared absorbing (700-1000nm) pigment is made
  • · Replies 2 ·
Replies
2
Views
2K
Is someone out here able to help me name these compounds?
  • · Replies 4 ·
Replies
4
Views
2K
Pulse Drying of Evaporated Milk
  • · Replies 2 ·
Replies
2
Views
3K
Composites, Volume fractions exceeding Max Packing Fractions
  • · Replies 2 ·
Replies
2
Views
5K
Graduate When should I analyze optical problems using ray tracing vs. wavefront analysis?
  • · Replies 12 ·
Replies
12
Views
2K
Chemical/Paint Possibility of Electrically Charging Pigments DIY?
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad Building a flat rectangular vacuum chamber
  • · Replies 11 ·
Replies
11
Views
20K
Materials Balance question for assignment. Help needed.
  • · Replies 1 ·
Replies
1
Views
5K