MET 34800 – Engineering Materials Chapter 7

MET 34800 – Engineering Materials Chapter 7...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MET 34800 ENGINEERING MATERIALS IUPUI ENGINEERING TECHNOLOGY ENT Department CHAPTER 7 PRINCIPLES OF POLYMERIC MATERIALS Engineering Materials: properties and selection, 9th ed. Kenneth G. Budinski, Michael K. Budinski Upon completion of this chapter, the student should: have an understanding of how polymerized organic materials form engineering materials have an understanding of the chemical makeup of polymeric materials have an understanding of the techniques that are used to strengthen polymers CHAPTER GOALS In this chapter, we will discuss how polymers are created, their chemistry, their bonding mechanisms, their strengthening. Our chapter objective is that students understand the concept of polymerization and where different polymers come from. 3 Natural polymers (lignin, shellac, etc.) Chronology of plastics Definition of a polymer Definition of polymerization INTRODUCTION 4 Figure 71 Chronological development of important engineering polymers INTRODUCTION 5 Addition reaction Condensation reaction Monomer or mer symbol Saturated and unsaturated bonds Hydrogen atom substituents Determination of molecular weight Use of FTIR for analysis Copolymerization Stereospecificity Blends, alloys, homopolymers, macromolecules 7.1 POLYMERIZATION REACTIONS 6 Figure 72 Polymerization reactions 7.1 POLYMERIZATION REACTIONS 7 Figure 73 Infrared spectroscopy for analysis of polymers 7.1 POLYMERIZATION REACTIONS 8 7.2 BASIC TYPES OF POLYMERS 9 Figure 74 Spectrum of polymeric materials and some of the important thermoplastic and thermosetting plastic families. Commodity plastics generally have lower cost, and they are the most used plastics. Engineering plastics include all others. Basic polymer structures: linear branched cross-linked Chain stiffening Isotactic/syndiotactic, etc. Amorphous vs Crystalline Polymers Definition of amorphous Definition of crystalline Melting point Specific volume Melting in amorphous polymers Glass transition temperature Properties of amorphous polymers Properties of semi-crystalline polymers 7.3 ALTERING PROPERTIES OF POLYMERS 10 Additives Compounded plastics (master batch, etc.) Fillers Plasticizers Stabilizers and antioxidants Particles Reinforcing with other plastics (interpenetrating networks) 7.3 ALTERING PROPERTIES OF POLYMERS 11 Figure 75 Schematic of polymer chains in a linear polymer 7.3 ALTERING PROPERTIES OF POLYMERS 12 Figure 76 Polymer chains in a branched polymer 7.3 ALTERING PROPERTIES OF POLYMERS 13 Figure 77 Cross-linked polymer 7.3 ALTERING PROPERTIES OF POLYMERS 14 Figure 78 Strengthening due to chain stiffening 7.3 ALTERING PROPERTIES OF POLYMERS 15...
View Full Document

This note was uploaded on 12/01/2010 for the course MET 34800 taught by Professor Flechinsine during the Spring '10 term at IUPUI.

Page1 / 42

MET 34800 – Engineering Materials Chapter 7...

This preview shows document pages 1 - 16. Sign up to view the full document.

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