1. Bulk Polymerization Standard Operating Procedure (SOP)
Devin Roach
Open Polymer Active Learning Laboratory
Georgia Tech
Updated Spring 2019 (Paul Russo)

2. Removing the Inhibitor in Bulk Styrene
We pass the styrene monomer through this column containing activated alumina. A cotton ball goes in, then the activated alumina, optionally a second cotton ball on top. Then pour through your styrene. The filtered styrene will collect in the 20mL vial below the syringe.
Alternately, we may use this prefabricated equivalent from Aldrich. SKU EA
(1)
(3)
(2)
Filtered styrene will collect here 1

3. Adding Initiator
Next, we must mix toluene and the initiator (AIBN) together. This is then placed into the filtered styrene monomer solution.
We may instead use BPO: benzoylperoxide. It might dissolve right in the styrene…no need for toluene.
Toluene +
AIBN initiator 2

4. Mix the solution in an oil bath
Then, we should mix the solution using a glass rod. After the initiator is homogenously distributed, the mixture should also be placed at 80°C in a hot oil bath. Leave for 20 minutes, stirring occasionally. 3

5. Observe the polymer
After letting cool to RT, use the glass rod to pull a fiber out of the mixture and observe the polymerization.
Or…add a bit of nonsolvent, such as hexane or alcohol. 4

6. Follow these tips for safe and efficient bulk polymerization.
Put on glasses, gloves, and lab coats upon entering the lab.
Perform the polymerization under the hood to avoid ingesting volatile chemicals.
Take care when using the hot oil bath (or Armor BeadsTM). 5