स्लाइम संश्लेषण (क्रॉस-लिंक्ड PVA)

पॉलीविनाइल अल्कोहल को क्रॉस-लिंक करके एक गैर-न्यूटोनियन तरल पदार्थ बनाना

Organic Synthesis Beginner (Middle School) 20 मिनट ~$5.00

उद्देश्य

पॉलीमर रसायन और गैर-न्यूटोनियन द्रव व्यवहार प्रदर्शित करते हुए, सोडियम बोरेट के साथ पॉलीविनाइल अल्कोहल (PVA) को क्रॉस-लिंक करके स्लाइम बनाएं।

पृष्ठभूमि

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.

सुरक्षा चेतावनियाँ

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

आवश्यक PPE

goggles

सामग्री

  • 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

उपकरण

250 mL beaker Stirring rod Measuring cylinder

प्रक्रिया

1

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

1 मिनट
2

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

1 मिनट
3

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

3 मिनट
4

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

5 मिनट Wash hands afterward
5

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

5 मिनट
6

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

5 मिनट

अपेक्षित परिणाम

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.

सफाई

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 स्लाइम संश्लेषण (क्रॉस-लिंक्ड PVA)?
पॉलीमर रसायन और गैर-न्यूटोनियन द्रव व्यवहार प्रदर्शित करते हुए, सोडियम बोरेट के साथ पॉलीविनाइल अल्कोहल (PVA) को क्रॉस-लिंक करके स्लाइम बनाएं।
How difficult is स्लाइम संश्लेषण (क्रॉस-लिंक्ड PVA)?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for स्लाइम संश्लेषण (क्रॉस-लिंक्ड PVA)?
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 स्लाइम संश्लेषण (क्रॉस-लिंक्ड PVA)?
The main materials required are: Polyvinyl alcohol (PVA) solution, Sodium borate (borax), Food coloring.
What results should I expect from स्लाइम संश्लेषण (क्रॉस-लिंक्ड PVA)?
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.