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Difference Between Aramid and Carbon Fiber

August 15, 2019 Posted by Madhu

The key difference between aramid and carbon fiber is that aramid fiber is tough, whereas carbon fiber is brittle.

Aramid fiber and carbon fiber are two polymer materials that look very similar. However, they are different polymer materials with different physical properties. Moreover, their properties determine the application of each material. Thus, there is a distinct difference between aramid and carbon fiber despite their similarity in appearance.

CONTENTS

1. Overview and Key Difference
2. What is Aramid Fiber
3. What is Carbon Fiber
4. Side by Side Comparison – Aramid vs Carbon Fiber in Tabular Form
5. Summary

What is Aramid Fiber?

Aramid fiber is a class of heat resistant synthetic fibers. Due to the favorable properties of this material, it is widely used in aerospace and military applications. Moreover, we can prepare aramid fibers via the reaction between an amine group and a carboxylic acid halide group. For example, some well-known aramid fibers include Kevlar, Twaron, and Nomex. Furthermore, aramid fiber is suitable for the manufacture for phone covers since it is nonconductive and does not interrupt signals.

Difference Between Aramid and Carbon Fiber

Figure 01: Use of Aramid Fiber

Properties of Aramid Fiber

The most important properties of this material are as follows:

  • High toughness
  • High flexibility
  • Does not conduct electricity at all
  • Light golden color
  • High melting point
  • High abrasion resistance
  • Resistance towards organic solvent
  • Sensitive to UV radiation
  • Low flammability
  • Sensitive to acids and salts

What is Carbon Fiber?

Carbon fiber is a polymer material containing very thin strands of the element carbon. Despite its size, this material has high tensile strength and is very strong. Moreover, carbon fiber is about twice as stiff as steel and five times as strong as steel.

Aramid vs Carbon Fiber

Figure 02: Uses of Carbon Fiber due to its High Strength

Properties

The most important properties of carbon fiber are as follows:

  • Extremely strong
  • Brittle
  • High conductivity
  • Black color
  • High chemical resistance
  • High-temperature tolerance
  • Low thermal expansion

What is the Difference Between Aramid and Carbon Fiber?

Aramid fiber and carbon fiber appears similar, but they are two different materials. The key difference between aramid and carbon fiber is that the aramid fiber is tough, whereas carbon fiber is brittle. Furthermore, aramid fiber is less strong, but carbon fiber is extremely strong. Aramid fiber is suitable for the manufacture for phone covers because it is nonconductive and does not interrupt signals, but carbon fiber is not suitable for this application due to its high conductivity.

Furthermore, the below infographic shows more comparisons regarding the difference between aramid and carbon fiber.

Difference Between Aramid and Carbon Fiber in Tabular Form

Summary – Aramid vs Carbon Fiber

Aramid fiber and carbon fiber appears similar, but they are two different materials. The key difference between aramid and carbon fiber is that aramid fiber is tough, whereas carbon fiber is brittle.

Reference:

1. Johnson, Todd. “How Is Carbon Fiber Made?” ThoughtCo, Apr. 21, 2019, Available here.

Image Courtesy:

1. “Glass-aramid-hybrid-area used-for-reinforced-plastics” By User Cjp24; edited by User Jaybear also – File Glass aramid hybrid area.jpg (CC BY-SA 3.0) via Commons Wikimedia
2. “MotorcycleRacingGlove” By Thermos – Own work (CC BY-SA 4.0) via Commons Wikimedia

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Filed Under: Polymer Chemistry

About the Author: Madhu

Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. With a mind rooted firmly to basic principals of chemistry and passion for ever evolving field of industrial chemistry, she is keenly interested to be a true companion for those who seek knowledge in the subject of chemistry.

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