polymer

name: polymer description: Polymer science fundamentals license: MIT compatibility: opencode metadata: audience: chemists, materials scientists, students category: chemistry

What I do

• Explain polymer structure and properties
• Describe polymerization mechanisms
• Discuss polymer classification
• Analyze polymer applications
• Explain polymer processing
• Connect structure to properties

When to use me

• When learning polymer basics
• When explaining polymer properties
• When selecting materials
• When preparing educational content

Key Concepts

Polymer Classification

Origin

• Natural: Cellulose, starch, proteins, DNA
• Synthetic: Nylon, polyethylene, polystyrene
• Semi-synthetic: Cellulose nitrate

Structure

• Linear: Single chain
• Branched: Side chains
• Crosslinked: Network
• Dendrimers: Hyperbranched

Polymer Structure

# Polymer types by thermal behavior
polymer_types = {
    'thermoplastics': 'Soften on heating (PE, PP, PVC)',
    'thermosets': 'Crosslink on heating (epoxy, phenol-formaldehyde)',
    'elastomers': 'Elastic deformation (rubber, silicone)'
}

# Amorphous vs Crystalline
structure_types = {
    'amorphous': 'Random coil, no order (glass below Tg)',
    'semicrystalline': 'Ordered regions in amorphous matrix (Tm > Tg)',
    'crystalline': 'Highly ordered (rare in polymers)'
}

Mechanical Properties

• Tensile strength
• Elastic modulus
• Elongation at break
• Impact resistance
• Hardness
• Creep resistance

Common Applications

• Packaging: PE, PP, PET
• Fibers: Nylon, polyester
• Coatings: Acrylics, epoxies
• Adhesives: PVA, cyanoacrylate
• Elastomers: Natural rubber, silicone