An Introduction to Polymer Physics

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1 An Introduction to Polymer Physics Why & What Why do you choose this course? What do you know about polymer (physics)? Wentao Hao College of Chemical Engineering Hefei University of 2 Physics Physics (Greek( Greek: physis meaning "nature" nature") is a natural science; ; it is the study of matter and its motion through spacetime and all that derives from these, such as energy and force.. More broadly, it is the general analysis of nature,, conducted in order to understand how the world and universe behave. From Wikipedia, the free encyclopedia Polymer physics Polymer physics is the field of physics associated to the study of polymers,, their fluctuations, mechanical properties,, as well as the kinetics of reactions involving degradation and polymerisation of polymers and monomers respectively. From Wikipedia, the free encyclopedia 3 4 Polymer physics 1. Introduction to the course However, it is not a clear description. In my opinion, polymer physics can also be defined as the relationship between the structure and properties of polymer. 1.1 Polymer and scope of the book 1.2 The chemical nature of polymers 1.3 Some useful physical techniques 5 6 1

2 1.1 polymer and scope of the book What is polymer? Macromolecule Long chain Chemical bonds Rotation Flexibility Condensed state structure Molecular motion Mechanical performance diversity 7 8 rotation What s this? 9 10 flexibility Linked units are more and more

3 motion 13 motion 14 Chemists in Japan have created lightdriven polymer films that can walk like inchworms and move like robotic arms Condensed state structure 17 Condensed state structure 18 3

4 The weapon is fed from translucent, double-column box magazines (molded from a highstrength polymer) with a 30-round capacity and an empty weight of 130 g (4.59 oz). The light machine gun version of the AUG uses an extended 42-round magazine. EAT, SLEEP, DO POLYMER Mechanical performance Super aborsobant polymer performance How to understand the diversity of polymers? 1.2 classification of polymers linear A. Classification based on structure Branched Branched

5 crosslinked crosslinked crosslinked B. Classification based on properties Thermoplastics

6 So, what is the main feature of thermoplastics? 1950's Thermoset flower necklace with rhinestone centers high performance thermoset composites Rubbers Rubber band gun

7 LCP amorphous crystalline crosslinked thermoplastics Thermosets or Rubbers 37 Needle-free syringe molded of Vectra liquid crystal polymer Some useful physical techniques Differential Scanning Calorimetry (DSC)

8 X-ray scattering Carbon dioxide also displays, 2 stretching and 1 bend vibration

9 49 50 SEM & TEM STM AFM

10 Time to Ask Questions HOMEWORK Why shall we learn the polymer structure? What are the four levels of polymer structure? What is the short range structure? What is configuration of polymer? Read some relative books or literatures and find the answer

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