Relating Properties, Uses, and Structure (HSC SSCE Chemistry): Flashcards
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Properties of crystalline polymer regions
Properties of crystalline polymer regions
Rigid, high melting point, dense, opaque, impermeable
Properties of amorphous polymer regions
Properties of amorphous polymer regions
Flexible, low melting point, transparent, less dense, permeable
Effect of low branching on polymers
Effect of low branching on polymers
Higher crystallinity, density, strength; reduced transparency
Effect of longer polymer chains
Effect of longer polymer chains
Higher melting points and increased hardness
How larger side groups affect flexibility
How larger side groups affect flexibility
Reduce flexibility, make polymer stiffer and more rigid
Cross-linking in polymers
Cross-linking in polymers
Creates bonds between chains, forming rigid network structures
Vulcanisation process
Vulcanisation process
Heating rubber with sulfur to form S-S bonds between chains
Why heavily cross-linked polymers can't be recycled
Why heavily cross-linked polymers can't be recycled
Covalent bonds don't break when heated; material decomposes
Bond types in most synthetic polymers
Bond types in most synthetic polymers
Strong covalent C-C and C-H bonds
How to increase polymer biodegradability
How to increase polymer biodegradability
Copolymerisation with natural polymers like starch