🧬 Organic Chemistry
Bonds, isomerism, alkanes, alkenes, aromatics, alkyl halides, oxygenated compounds, acids, amines, biomolecules and polymers. Theory, examples, and solved exercises.
Complete Theory
Worked Examples
Example 1Average molecular weight calculation
Example 2Block copolymer synthesis (living)
Exercises with Solutions
Exercise 1Polymer classificationMedium
📋 Problem to solve
Classify each polymer as thermoplastic or thermoset and explain: (a) polyethylene, (b) epoxy resin, (c) nylon 6,6, (d) Bakelite (phenol-formaldehyde resin).
📌 Given data
Definition: thermoplastics soften with heat, thermosets cross-link irreversibly
Exercise 2Ziegler-NattaHard
📋 Problem to solve
Why is polypropylene obtained with Ziegler-Natta catalysts isotactic, while that obtained by radical polymerization is atactic?
📌 Given data
Z-N catalyst: TiCl₄ + AlEt₃, heterogeneous active siteRadical polymerization: peroxides, free mechanism
Exercise 3Thermal propertiesVery Hard
📋 Problem to solve
A semi-crystalline polymer has Tg = 80°C and Tm = 250°C. Describe the physical state of the material at: (a) 25°C, (b) 120°C, (c) 200°C, (d) 280°C.
📌 Given data
Tg < Tm. Below Tg: glassy. Between Tg and Tm: rubbery (amorphous phase) + crystalline. Above Tm: liquid.
Recommended Books
As an Amazon Associate I earn from qualifying purchases.