Synthèse de Slime (PVA Réticulé)

Création d'un fluide non newtonien par réticulation de l'alcool polyvinylique

Organic Synthesis Beginner (Middle School) 20 min ~$5,00

Objectif

Créer du slime en réticulant l'alcool polyvinylique (PVA) avec du borate de sodium, démontrant la chimie des polymères et le comportement des fluides non newtoniens.

Contexte

When sodium borate (borax) is added to polyvinyl alcohol, borate ions form cross-links between PVA polymer chains, creating a viscoelastic material known as slime. The product exhibits non-Newtonian behavior: it flows slowly under gravity but breaks when pulled sharply.

Avertissements de sécurité

  • Borax is an irritant — avoid eye contact
  • Wash hands after handling slime
  • Do not eat the slime

EPI requis

goggles

Matériaux

  • Polyvinyl alcohol (PVA) solution (50 mL)
    4% solution or white school glue
  • Sodium borate (borax) (5 g)
    Dissolved in 50 mL water
  • Food coloring (2-3 drops)
    Optional

Équipement

250 mL beaker Stirring rod Measuring cylinder

Procédure

1

Pour 50 mL of PVA solution (or white school glue) into the beaker.

1 min
2

Add 2-3 drops of food coloring if desired and stir.

1 min
3

Slowly add the borax solution to the PVA while stirring continuously.

3 min
4

Continue stirring as the mixture thickens into slime. Knead with hands once it forms.

5 min Wash hands afterward
5

Test the non-Newtonian properties: roll into a ball, let it flow slowly, pull sharply to see it snap.

5 min
6

Experiment with the ratio of borax to PVA to change slime consistency.

5 min

Résultats attendus

A stretchy, squishy slime that flows slowly under gravity but breaks when pulled quickly. More borax makes stiffer slime; less makes it more fluid. The cross-linking is reversible — slime will slowly become more liquid over days.

Nettoyage

Slime can be disposed of in the trash. Wash hands with soap and water. Rinse beaker with warm water.

Détails

Catégorie
Organic Synthesis
Difficulté
Beginner (Middle School)
Durée
20 min
Coût estimé
$5,00
Étapes
6
Matériaux
3

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Frequently Asked Questions

What is the objective of Synthèse de Slime (PVA Réticulé)?
Créer du slime en réticulant l'alcool polyvinylique (PVA) avec du borate de sodium, démontrant la chimie des polymères et le comportement des fluides non newtoniens.
How difficult is Synthèse de Slime (PVA Réticulé)?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for Synthèse de Slime (PVA Réticulé)?
Key safety precautions include: Borax is an irritant — avoid eye contact; Wash hands after handling slime; Do not eat the slime.
What materials are needed for Synthèse de Slime (PVA Réticulé)?
The main materials required are: Polyvinyl alcohol (PVA) solution, Sodium borate (borax), Food coloring.
What results should I expect from Synthèse de Slime (PVA Réticulé)?
A stretchy, squishy slime that flows slowly under gravity but breaks when pulled quickly. More borax makes stiffer slime; less makes it more fluid. The cross-linking is reversible — slime will slowly become more liquid over days.