To explain — in a friendly, easy-to-follow way — what polymers are, the parts they’re built from, and the different types of polymers, we’ll use a beaded necklace as our reference.

Each single bead is a small molecule called a monomer. String thousands of those beads together into one long chain and you’ve made a polymer. That’s the whole idea in miniature — poly means “many,” so a polymer is simply many small units joined into something far bigger, and far more useful, than any single bead on its own. With that in mind, here are the six topics to explore:

• What Are Polymers? — the place to begin: what a polymer actually is, and why you’re surrounded by them.
• Types of Polymers — how polymers are sorted into families, from natural and synthetic to thermoplastics and thermosets.
• Properties of Polymers — the characteristics that give each polymer its particular behavior.
• Sustainability — resin identification codes, recycling, and what happens to a plastic once you’re done with it.
• Fillers & Additives — the extra ingredients blended in to change how a polymer looks, performs, or holds up.
• History — how polymers grew from a handful of lab discoveries into the materials that shape modern life.

Not sure where to begin? Start with What Are Polymers? and work your way down — each topic builds gently on the one before it.