Organic Chemistry- Polyurethane Foam

Bromination of Saturated and Unsaturated Hydrocarbons

Blue Bottle

Dehydration of Sugar by Sulfuric Acid

Disappearing Coffee Cup

Formation of a Silver Mirror

Models 360

Nylon 6 – 10

Organic Synthesis of Familiar Materials

Oxidation of Primary, Secondary, Tertiary Alcohols

Oxidation of Luminol

Polyurethane Foam

Slime

Underwater Fireworks: Chlorination of Acetylene

Carbide Lamp

Differences in Miscibility of Organic Alcohols With Increasing Chain Length

Combustion of Cellulose Nitrate (Guncotton)

Different Smells of Carvone Isomers

Distinguishing Between HD and LD Polyethylene

Enviro-bond: Cleaning Oil Spills

Esterification Using a Dean-Stark Trap

Ethanol Cannon

Happy/Sad Balls

IR Demonstrations I- Atomic Coupling

IR Demonstrations II – Molecular Vibrations

IR Demonstrations III – Molecular Vibrations

Making a Rubber Ball from Latex

Plastic Samples

Reducing Sugars and Fehling’s Solution

Rod Climbing by a Polymer Solution

Rotating Rainbows

Silly Putty

Soap Emulsifies Hydrocarbons

Superabsorbent Polyacrylate Gel

Tubeless Siphon

Alkimer

Aniline Hydrochloride-Formaldehyde Polymer

Phenol-Formaldehyde Polymer

Saponification

Relative Reactivity of Reducing Agents

Electrophilic Aromatic Substitution Reaction/EAS Reaction

Reactivity of Alkanes vs Aromatic Compounds

Inductive Effect

Optical Activity of Racemic Mixtures With Limonene

Relationship of Absorbed Light to Observed Color

Density and Miscibility of Liquids

Extraction of Copper Ions from Solution with Orform®

Gel Formation with Sodium Alginate and Calcium Chloride

Ozonolysis

Hydrolysis of T-Butyl Chloride: A Lecture and Lab Experiment

Polyurethane Foam

Description: Polyurethane foam is produced by mixing two liquids, a polyether polyol and a polyfunctional isocyanate. A rigid foam is produced which is many times larger than the original volume.

Source: Shakhashiri, B.Z.  Chemical Demonstration: A Handbook for Teachers of Chemistry

Year: 1983   Vol: 1   Page: 216

Keywords: Polymers, Polyurethane,  Polyol, Isocyanate

Rating:

Hazard: Some

  • Acute toxicity hazard
  • Flammable liquids
  • Inhalation hazard
  • Skin irritation

Effectiveness: Average

  • Results are observable without guidance
  • Somewhat connected conceptually to course material
  • Mild effects are seen by audience
  • Contrast between systems is noticeable
  • Good reliability
  • Time to result is medium

Difficulty: Medium

  • Some concerted or timed manipulations
  • Handling of organic chemicals
  • Simple procedures

Safety Precautions:

  • Eye protection required
  • Gloves required
  • Perform in well-ventilated area
  • Perform on temporary surface such as newspaper

Class: Polymers, Organic Chemistry, Macromolecules

Division: General, Organic Chemistry