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🧪 Polymères

🛞Caoutchouc naturel

Cis-1,4-polyisoprène d’Hevea : les pneus boivent l’essentiel du latex.

Aussi appelé: NR · polyisoprene · latex rubber

Caoutchouc naturel — Wikimedia lead image
Gradstudentscholar · CC BY-SA 4.0

Repères

Hevea brasiliensisTree
Sulfur vulcanisationCure
Tyre piles burn hotFire
Pneumatic tyreIcon
SBR / BRSynth rival
polymersFamily

Caoutchouc naturel is one of 32 materials in this atlas, grouped under polymers: history, structure, measured properties, process routes, uses, safety and market — not a product catalogue.

Scores compare Caoutchouc naturel with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates.

Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.

Introduction approfondie

Deep dive: Caoutchouc naturel

Caoutchouc naturel ((C5H8)n cis-1,4) is a family of grades whose density ~0.92 g/cm³, heat band elastomer; decomposes on heat, and fire letter combustible; tyres are a fire load.

What “the material” actually is

Caoutchouc naturel is sold as grades, not as a single substance. Chemistry (C5H8)n cis-1,4, density ~0.92 g/cm³, heat band elastomer; decomposes on heat.

This atlas treats Caoutchouc naturel as a system: mill route, coatings, tests and the cavity it sits in.

Heat, fire and insulation

Conductivity note: ~0.15 W/m·K. Insulation score 38/100 is relative to 32 entries — metals lose, VIPs and aerogels win.

Fire letter in editorial use: combustible; tyres are a fire load. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.

How it is made and used

Origin: Mesoamerican use / Goodyear 1839 / Wickham 1876, Amazonia → Malaysia. The process chapter follows feedstock → conversion → forming → finish → install.

Uses span buildings to defence / safety. Pairings matter: silicone.

Market and circularity

Producers below are landmarks, not an endorsement ranking. Prices are bands, not live quotes.

Circularity mark 46/100. Ask which scrap, which certificate, which year.

Profil

484018387446
Résistance 48
Résistance à la chaleur 40
Performance au feu 18
Isolation 38
Ouvrabilité 74
Circularité 46

Sept chapitres

Questions fréquentes

Is Caoutchouc naturel non-combustible?
Declared reaction class in this atlas: combustible; tyres are a fire load. Assemblies still need resistance tests.
Does Caoutchouc naturel insulate?
Thermal mark 38/100 versus the atlas. Conductivity note: ~0.15 W/m·K.
What is the density band?
~0.92 g/cm³
How is it made?
Origin story: Mesoamerican use / Goodyear 1839 / Wickham 1876 (Amazonia → Malaysia).
Can it be recycled?
Circularity mark 46/100 — editorial, route-specific.
Typical melting or failure heat?
elastomer; decomposes on heat
What should it be paired with?
silicone: The high-temp elastomer NR cannot be.
Where is it specified?
Buildings, transport, energy and consumer goods — see the uses chapter.

Icônes

Charles Goodyear

Charles Goodyear

United States · 1839

Charles Goodyear is a reference point in the public image of Caoutchouc naturel.

John Boyd Dunlop

John Boyd Dunlop

United Kingdom · 1888

John Boyd Dunlop is a reference point in the public image of Caoutchouc naturel.

Michelin Bibendum

Michelin Bibendum

France · 1898

Michelin Bibendum is a reference point in the public image of Caoutchouc naturel.

Hevea tapping

Hevea tapping

SE Asia · 20th c.

Hevea tapping is a reference point in the public image of Caoutchouc naturel.

Fordlandia

Fordlandia

Brazil · 1928

Fordlandia is a reference point in the public image of Caoutchouc naturel.

F1 slick

F1 slick

Global · 1950s–

F1 slick is a reference point in the public image of Caoutchouc naturel.

Surgical glove

Surgical glove

Global · 19th c.–

Surgical glove is a reference point in the public image of Caoutchouc naturel.

Eraser

Eraser

Europe · 18th c.–

Eraser is a reference point in the public image of Caoutchouc naturel.

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