Polymer

RAMBHAI BARNI RAJABHAT UNIVERSITY CHEMISTRY OF SCIENCE Polymer Processing Demonstrations Using PET Bottles Miss Nithiya Wongwan ID: 5915891011

Polymer  A polymer is a large, chain-like molecule made up of monomers linked connected by covalent bonds  Polymers may be divided into two categories Natural polymers Synthetic polymers Monomer Mono-one Polymer Molecule Poly-many 2

Polymers are materials  Polymers are materials that are present everywhere in daily life and industry  The amount use of polymers is constantly increasing  One of the main uses of plastics is for packaging  Polyethylene terephthalate (PET) is the most commonly used polyester type of thermoplastic polymer. 3

Thermoplastic  The structure is chain length polymer  Thermoplastics will soften when heated, and can be formed into various shapes  Once cooled, they retain their shapes.  The plastic can be reformed 4

 Previous polymer publications focused on the application rather than polymer chemistry  Use specialty polymers, like poly(vinyl alcohol), sodium polyacrylate and sodium alginate, which are not similar to the bulk of the plastics used daily 5

Objective  The students practical experiments  The students via studying the physical properties of polymers Polyethylene terephthalate (PET) was used as the sample  Readily available  Showed the physical properties of the polymer after heating 6

PET formation ? Polycondensation reaction Transesterification reaction 7

Polyethylene terephthalate (PET)  Highly transparent polymers are amorphous or semicrystalline  More flexible  PET has a glass transition temperature (Tg) around 75 °C 8

PROCEDURE  Make Your Own Bottle Preform PET bottle 9

Injection blow molding 10

 Make Your Own Bottle 11

 Plastics Don’t Forget 12

 Making Spirals 13

Hazards  Heat resistant gloves may be used  Check the preform for defects such as bubbles  Make Your Own Bottle experiment be performed only as a demonstration by the teacher  Only use real, thick walled preform tubes, as the other tubes may burst upon pumping 14

Conclusion  The students easily understood the properties of the polymer from practical experiments  Actively participated to learn polymers in particular 15

Thank you