1 of 14

Nylon_2

2 of 14

Quiz

Young’s modulus of nylon is 4.2 GPa, calculate the force when extending 10um diameter nylon fiber 10%.

3 of 14

Quiz

If Nylon 6,6 has 700 MPa of the tensile strength, how about the tensile strength in cN/dtex?

Density of nylon is 1.15g/cm^3

Definition: tensile strength=maximum strength/surface area

4 of 14

PA6

PA6,6

5 of 14

6 of 14

Water absorption of PA

7 of 14

8 of 14

Silk structure

Abundant Gly

Spider silk structure

Abundant Ala

9 of 14

10 of 14

11 of 14

12 of 14

Nylon

Silk

13 of 14

https://boltthreads.com/technology/microsilk/

14 of 14

Take home midterm

Open book, discussion allowed! If be advised by your friend and it was critical, please clarify your friend in the report(extra points for tutoring).

​

  1. Denier calculation
  2. Dry/wet strength of cotton vs Rayon
  3. Prediction of new polyester’s physical properties
  4. Why we convert PAN to carbon fiber?
  5. Predict wet tensile strength of Nylon and compare Nylon 6 and Nylong 6,6.