781 likes | 1.95k Views
Part 1. Introduction to Polymer Science. 4 th edition L. H. Sperling ISBN 0-471-70606-X. Midterm + Final 50 % Quizzes 50 %. Introduction to Polymer Science Chain Structure and Configuration Dilute Solution Concentrated Solution The amorphous state The crystalline state
E N D
Part 1.Introduction to Polymer Science 4th editionL. H. Sperling ISBN 0-471-70606-X Midterm + Final 50 % Quizzes50 %
Introduction to Polymer Science • Chain Structure and Configuration • Dilute Solution • Concentrated Solution • The amorphous state • The crystalline state • Polymers in the liquid crystalline state • Glass-Rubber Transition Behavior • Cross-linked Polymers and Rubber Elasticty • Polymer Viscoelasticity and Rheology • Mechanical Behavior of Polymers • Polymer Surfaces and Interfaces • Muticomponent Polymeric Materials • Modern Polymer Topics
Part 2.Polymer Crystallography Crystallization Mechanism Diffraction (WAXS/SAXS)
Vulcanization of natural rubber Charles Goodyear (1800-1860)
Macromolecular Hypothesis HERMANN STAUDINGER (1881-1965) 1953 Nobel Laureate in Chemistry for his discoveries in the field of macromolecular chemistry. Background Residence: Germany
Alkane/Polyethylene Monomer oligomer polymer
Molecular weight-melting temperature relationship for the alkane series Tm of PE
Entanglement of polymer chains Low molecular weight No entanglement High molecular weight Chains are entangled
1.2 Molecular weight and molecular weight distributions 1.2.1 Effect on tensile strength sbis tenile stress to break Mn is the number-average molecular weight A and B are constants
1.2.2 Molecular weight average Number average molecular weight Weight average molecular weight Mw/Mn: polydispersity index
1.3 Major polymer transition • Glassy • glassy transition • rubbery plateau • Rubbery flow • Viscous flow
1.4 Polymer synthesis and structure 1.4.1 Chain polymerization 1.4.1.1 Free Radical polymerization Initiation Propagation termination 1.4.1.2 initiation
1.4.1.3 propagation 1.4.1.4 termination
1.4.2 Step polymerization 1.4.2.1 A polyester condensation reaction
Nylon 4 Nylon 48
1.5 Cross-linking, plasticizers, and fillers The cross-linking of rubber with sulfur is called “vulcanization”
PB PE PP PI PS PAN
PVAC PVA PVC
Teflon PMMA
PPO POM Nylon66 PEO Nylon6 PET