Chapter 4Rubber(Elastomers)4.1 An introduction4.2 The structure and properties4.3 Natural rubber4.4 General-purpose rubbers4.5 Speciality rubbers4.6 Thermoplastic elastomers(TPR)
Chapter 4 Rubber( Elastomers) 4.1 An introduction 4.2 The structure and properties 4.3 Natural rubber 4.4 General-purpose rubbers 4.5 Speciality rubbers 4.6 Thermoplastic elastomers(TPR)
4.1An introduction:DefinitionWhat are elastomers or rubbers?flexible (lower T.)crosslinked chainsnon or low crystallinity
What are elastomers or rubbers? ▪ flexible (lower Tg ) ▪ crosslinked chains ▪ non or low crystallinity 4.1 An introduction：Definition
Anintroduction:105fiberrigid-104flexibleplasticplasticstress(N/cm*)103elastomer1021002003004005006001strain (%elongation)After Odian,George;Principles ofPoiymerization3rded.,J.Wiley,NewYork,199l,p.34
An introduction：
Classification of elastomersBasedonApplication:General-purpose rubbersSpeciality rubbersBasedonOrigin:NaturalrubberSynthetic rubber
Based on Application: ▪ General-purpose rubbers ▪ Speciality rubbers Based on Origin: ▪Natural rubber ▪Synthetic rubber Classification of elastomers
Classification of elastomersBasedonstructure- Diene polymer: polybutadieneetcPolyisoprene-Others : acrylic rubberfluororubberSilicone rubberpolyurethane rubber
Based on structure ◼ Diene polymer: polybutadiene Polyisoprene etc ▪ Others : acrylic rubber fluororubber Silicone rubber polyurethane rubber Classification of elastomers