Objectives
- Find out the right proportions of materials used
- Start one synthesis
- Find the proper cross linking temperature
Materials
- DER 331, which is an undiluted diglycidyl ether of bisphenol A (DGEBA).
- JEFFAMINE® D-400 amine
- Titanium Dioxide T696
Measurements
the proportion of Amine to Epoxy should be 1:1 in equivalent weights.
The equivalent weight for the epoxy is 182-192 g/mol.
The below image shows the equivalent weights of a few Jeffamines
The image is from Hunstman's EPOXY FORMULATIONS USING JEFFAMINE® POLYETHERAMINES. Here is the link: http://www.huntsman.com/portal/page/portal/performance_products/Media%20Library/global/files/epoxy_formulations_using_jeffamine_polyetheramines.pdf
Synthesis
- measure 3.0559 g of JD-400
- add 5.5633 g of the epoxy
- add 0.8473 g of TiO2
- let stir for 5 minutes with temperature of 85C
- reduce the temperature to 50C for another 10 minutes.
- transport the mixture into an aluminum dish
- Let it sit in room temperature till next lab section.
DSC Test
- Weigh a pan and a lid, 51.76 mg
- add the mixture, 9.81 mg, in the pan and press the lid on it
- Input into DSC to test for temperature starting at 20C to 200C, adding 5C/min
- This test will let us know the optimum temperature for cross linking
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