Uploaded August 2026 | Updated September 2026, 2 weeks ago

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Why do elastic bands eventually lose their stretch? Rubber bands can stretch hundreds of times, but over time they may become weak, stiff, sticky, or brittle.

In this episode, we explore how rubber’s molecular structure works and how stretching, heat, sunlight, oxygen, and ozone gradually change it.

⏱️ Timestamps:

00:00 — Introduction
01:15 — Rubber Is Made of Long Molecular Chains
01:50 — Cross-Links Give Rubber Its Memory
02:35 — Stretching Doesn't Destroy It Immediately
03:13 — Holding It Stretched Is Different
03:59 — Heat Speeds Up Aging
04:46 — Sunlight and Ozone Attack Rubber
05:18 — Why Old Rubber Can Become Sticky or Brittle
05:56 — Why Some Bands Last Longer
07:07 — Outro

#HistoryOfSimpleThings #RubberBands #Elasticity #Rubber #PolymerScience #MaterialsScience #EverydayScience #Chemistry