L1 /
1
CH1012
LECTURE 30
LAST LECTURE
Terpenes - isoprenes head-tail ฎ head-tail
Polymers: Biopolymers, Synthetic
Addition
polymers - radical chain mech.
Condensation
polymers eliminate H2O
Thermoplastic -reshape, Thermosetting -cant
Structure = amorphous solids with some
local areas of crystallinity LDPE, HDPE
local areas of crystallinity LDPE, HDPE
Crosslinking,
Vulcanisation, plasticizers.
Copolymer
- different monomers, nylon66
Benzene - aromatic 6 p
electron system,
resonance
stabilised, Kekul้ structures
Phenol - resonance stabilised phenoxide
ion which means phenol is a weak acid.
ion which means phenol is a weak acid.