Síntese de Slime (PVA Reticulado)

Criação de um fluido não newtoniano por reticulação de álcool polivinílico

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

Objetivo

Criar slime reticulando álcool polivinílico (PVA) com borato de sódio, demonstrando a química de polímeros e o comportamento de fluidos não newtonianos.

Contexto

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.

Avisos de segurança

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

EPI necessário

goggles

Materiais

  • 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

Equipamentos

250 mL beaker Stirring rod Measuring cylinder

Procedimento

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

Resultados esperados

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.

Limpeza

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

Detalhes

Categoria
Organic Synthesis
Dificuldade
Beginner (Middle School)
Duração
20 min
Custo estimado
$5,00
Passos
6
Materiais
3

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Frequently Asked Questions

What is the objective of Síntese de Slime (PVA Reticulado)?
Criar slime reticulando álcool polivinílico (PVA) com borato de sódio, demonstrando a química de polímeros e o comportamento de fluidos não newtonianos.
How difficult is Síntese de Slime (PVA Reticulado)?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for Síntese de Slime (PVA Reticulado)?
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 Síntese de Slime (PVA Reticulado)?
The main materials required are: Polyvinyl alcohol (PVA) solution, Sodium borate (borax), Food coloring.
What results should I expect from Síntese de Slime (PVA Reticulado)?
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.