GeneralPolymericMaterials
General Polymeric Materials
Chapter 1Introduction1.1 Polymer Characteristics andClassifications
Chapter 1 Introduction 1.1 Polymer Characteristics and Classifications
Definitions Polymer - A very long molecule composed ofrepeating units connected by covalent bondsMonomer - A repeated unit in a polymerThe reactant for the polymerization reaction
Definitions ◼ Polymer – A very long molecule composed of repeating units connected by covalent bonds ◼ Monomer – A repeated unit in a polymer. The reactant for the polymerization reaction
Characteristics of PolymerStructure ClassificationSynthesis
Characteristics of Polymer ◼ Structure ◼ Classification ◼ Synthesis
Structure of Polymer Skeletal StructureChemical Structure
Structure of Polymer ◼ Skeletal Structure ◼ Chemical Structure
SkeletalStructureLinear - a chain with two endsR-OO-RHH
Skeletal Structure ◼ Linear – a chain with two ends
Skeletal StructureBranched - have side chains-HH-C-HCI-C-H-H-MACI-C-HHH-C-HCI-C-HH-C-H
Skeletal Structure ◼ Branched – have side chains
Skeletal StructureCrosslinked (Networked) - chains areconnected to other chainsOHHOOHOHHOOHOHOHOHHOOHOHOHHO
Skeletal Structure ◼ Crosslinked (Networked) – chains are connected to other chains
Chemical Structure Homopolymer - only one monomer(repeating unit)A-A-A-A-A-A-A: Copolymer - more than one monomer
Chemical Structure ◼ Homopolymer – only one monomer (repeating unit) - A – A – A – A – A – A – A - ◼ Copolymer – more than one monomer
CopolymersAlternatingA-B-A-B-A-B-A-B-A-A-B-B-A-A-B-B- Block-A-A-A-A-A-B-B-B-B-B-A-A-A-A-A--A-A-A-A-A-A-A-B-B-B-B-B-B-B-
Copolymers ◼ Alternating - A – B – A – B – A – B – A – B - - A – A – B – B – A – A – B – B - ◼ Block -A-A-A-A-A-B-B-B-B-B-A-A-A-A-A- -A-A-A-A-A-A-A-B-B-B-B-B-B-B-