Polymer Chemistry

Polymerisation reactions (2): formation of polymethylacryla-te

Polymerisation reactions (3): ionic polymerisation

Step-growth polymerisation (1): formation of polyamide

Step-growth polymerisation (2): production of nylon

Principle

The reaction of sebacoyl chloride with hexamethylenediamine forms Nylon 610^®. The two components are dissolved in two solvents of different density which do not mix with one another. For this reason, a reaction can take place only at the contact su ...

Step-growth polymerisation (3): base-catalysed formation ofphenol resins

Step-growth polymerisation (4): acid-catalysed formation ofphenol resins

Polyaddition (2): formation of polyurethane

Principle

The reaction of dialcohols with diisocyanates forms polyurethane. This is an example of a polyaddition reaction. The reaction releases heat which causes a foaming agent (water) to foam up the plastic that is formed.

Modification of plastics (1): production of phenol resinfoam

Modification of plastics (2): production of a urea resinfoam

Modification of plastics (4): production of film

Modification of plastics (5): production of polystyrene foam

Principle

Polystyrene containing n-pentane as a foaming agent can easily increase its original volume by 20 to 50 times when heated with steam. If pre-foamed polystyrene of this type is sintered together in a closed mould to make a section with a closed cell structure, th ...

Modification of plastics (6): production of plexiglas plates

Modification of plastics (7): production of laminated sheets

Identification of plastics (1): thermoplastics and thermo-setting plastics

Identification of plastics (2): identification scheme forthermoplastics