Синтез слайма (сшитый ПВА)

Создание неньютоновской жидкости сшиванием поливинилового спирта

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

Цель

Приготовить слайм, сшивая поливиниловый спирт (ПВА) боратом натрия, и показать основы химии полимеров и неньютоновского поведения жидкостей.

Предпосылки

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.

Предупреждения по безопасности

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

Требуемые СИЗ

goggles

Материалы

  • 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

Оборудование

250 mL beaker Stirring rod Measuring cylinder

Процедура

1

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

1 мин
2

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

1 мин
3

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

3 мин
4

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

5 мин Wash hands afterward
5

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

5 мин
6

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

5 мин

Ожидаемые результаты

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.

Уборка

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

Frequently Asked Questions

What is the objective of Синтез слайма (сшитый ПВА)?
Приготовить слайм, сшивая поливиниловый спирт (ПВА) боратом натрия, и показать основы химии полимеров и неньютоновского поведения жидкостей.
How difficult is Синтез слайма (сшитый ПВА)?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for Синтез слайма (сшитый ПВА)?
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 Синтез слайма (сшитый ПВА)?
The main materials required are: Polyvinyl alcohol (PVA) solution, Sodium borate (borax), Food coloring.
What results should I expect from Синтез слайма (сшитый ПВА)?
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.