Fundamentals of Materials Science and Engineering: An Integrated Approach, 3e

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2nd Revised Pages

8.17 Deformation of Semicrystalline Polymers • 273

Stage 1

Stage 2

(b)

(a)

(c)

t^0

t^0

t

t^0

Figure 8.27

Stages in the elastic deformation of a semicrystalline polymer. (

a) Two adjacent chain-folded lamellae and interlamellar

amorphous material before deformation. (

b) Elongation of amorphous tie chains during the first stage of deformation. (

c) Increase in

lamellar crystallite thickness (which is reversible) due to bending and stretching of chains in crystallite regions. (From Schultz, Jerold M.,POLYMER MATERIALS SCIENCE,

1st edition,

c©

1974, pp. 500, 501. Adapted by permission of Pearson Education, Inc., Upper Saddle

River, NJ.)