Chapter 15.4

Chapter 15.4 - Plastic Deformation of Semicrystalline...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
17 MSE 2090: Introduction to Materials Science Chapter 15, Processing of Polymers Plastic Deformation of Semicrystalline Polymers The macroscopic deformation involves necking. Neck gets stronger since the deformation aligns the chains and increases local strength in the neck region (up to 2-5 times) neck is expanding along the specimen. Elongation by extension of neck Chains in neck align along elongation direction: strengthening Different from ductile metals where the deformation is confined in the initial neck region.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
18 MSE 2090: Introduction to Materials Science Chapter 15, Processing of Polymers Factors that Influence Mechanical properties (I) ¾ Temperature and strain rate (already discussed) ¾ Chain entanglement , strong intermolecular bonding (van der Waals, cross-links) increase strength ¾ Drawing , analog of work hardening in metals, corresponds to the neck extension. Is used in production of fibers and films. Molecular chains become highly oriented properties of drawn material are
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/14/2012 for the course MSE 2090 taught by Professor Leoindzhiglei during the Fall '10 term at UVA.

Page1 / 5

Chapter 15.4 - Plastic Deformation of Semicrystalline...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online