Download - Alchemy or Chemistry ?
Alchemy or Chemistry?
Polymerisation!Polyester paperweights
By Adrian KT
What is an ester?
• Formed from the condensation of an alcohol and carboxylic acidEsterification
• Joined by ester linkage.• Catalysed by H+ ions
What is a Polyester?
• Poly: many• Many ester molecules joining to form a single,
long-chained polyester• Joined by the ester linkage• Can be used as fabric (soft), or as fiberglass
(hard)
Creating polyesters
• Chemical lists:Unsaturated Polyester Resin Methyl Ethyl Ketone Peroxide
FK8 (mold releasing agent)
Creating polyesters
• Procedures:1. Weigh 80g of unsaturated polyester resin into a
paper cup.2. Add 0.8g of methyl ethyl ketone peroxide into the
cup and stir well with a glass rod.3. Spray the mould with FK84. Add your own ‘decorations’ and pour the resin
into the mould.5. Allow the resin to settle and harden.