Thermal Analysis of Straight Permed Hair

January 2010 in “ Han-guk hyeonmigyeong hakoeji/Applied microscopy ”

Jung-Ae Rho, Gui-Young Lee, Byung‐Soo Chang

thermal analysis scanning electron microscopy virgin hair straight permed hair medulla cortex

TLDR Straight permed hair loses weight faster than virgin hair when heated, but ends up heavier after burning.

The study analyzed the thermal properties and combustion process of virgin and straight permed hair using thermal analysis and scanning electron microscopy. It was observed that weight changes began at 100℃, with straight permed hair showing a 2.6% higher weight loss than virgin hair up to 200℃. At 300℃, the weight loss was similar for both hair types, but at 400℃, virgin hair showed a lower weight loss than permed hair. By 500℃, the final weight of burnt straight permed hair was 2.9% higher than that of virgin hair. Morphologically, hair began to fuse with adjacent strands by 300℃, and by 500℃, it was completely carbonized, forming clumps with many blowholes on the surface.

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