Dezba Coughlin

1
Lecture 3

• Dezba Coughlin

2
Outline/Objectives

• Structural affects on properties
• Explain how structure affects the general
  mechanical and optical properties of polymers
• Transition temperatures in polymers
• Explain the glass transition temperature, factors
  affecting it, how to measure it
• Explain the melting temperature, factors
  affecting it, how to measure it
• Explain how temperature affects
  structure/properties of copolymers

3
Shear Bands
www.dstu.univ-montp2.fr/geofracnet/specifics.html
4
Crazing
Not the same material but an example of how
crazing would look like at different scales
http//www.kern-gmbh.de/kunststoff/service/glossar
/crazing.htm
http//techcenter.lanxess.com/sty/emea/en/products
/properties/article.jsp?docId2175pid49
www.cs.sandia.gov/sjplimp/lammps/pictures.html
5
Semicrystalline Polymer
Fringed micelle model
http//hekabe.kt.dtu.dk/vigild/2005_06_hempel/The
ory/
http//www.geosynthetica.net/tech_docs/hdpe_sc_pap
er.asp
6
Spherulites
Polarized Transmission Photomicrograph
http//www.poco.phy.cam.ac.uk/teaching/A_Donald/Po
lymer_2.htm