Chemicals can work their way down the hair shaft to get at the growth centers which lies at the bulb (5-6 mm deep) or at the bulge (about 2-3 mm from the skin surface). For heat burns, you should have a second or third degree burn to the skin and see it quickly, but for chemicals burns, it might take weeks for the full damage to be known. If the chemical burn causes complete loss of the hair growing centers, then the hair will fall out in 7-14 days, but if there is partial damage to just part of the growing follicle, this may take more than a month to understand the damage. Varying insults may force hair follicles to go into their resting phase (telogen) and after 2-6 months, it may go into its growth phase (anagen). In your situation, hair loss may be seen as early as a few days after the injury or it may also take weeks to see the full impact.
Just so you know...the more chemicals you use on your hair over the years the worse it will be for you in the future. Your hair will thin away to almost nothing. They suggest using perms/colorants etc only every two years or more. The effects of chemical burns can cause permanent damage, and may take a very long time to heal.
I suggest using arnica gel ( available at health food stores ) instead of the emu oil. Or one part arnica with 3 parts pure coconut oil...massage your scalp with this every night before bed. This should help your scalp and promote hair growth.
*Trivia* If you have ever used chemical treatments in your hair, they will ask you NOT to donate your locks to the Cancer Foundation. They use a special dye for the "pink" hair colorant for donations.