Flashcards in Polymer 1: Introduction to Polymers Deck (16):
Give 5 polymers used in nature?
1. Cellulose- tablet production
3. Dextran- temporary blood substitute
5. Gelatin- tablet production,
What are the three main roles of polymers in pharmacy
1. Drug delivery and formulation
- Emulsifiers and stabilisers
- Inhalers (nasal and pulmonary)
- Barrier to prevent moisture
- Recyclable materials
What are the two different aggregate states a polymer can be in?
Whats the difference between the dissolution of KCl and carboxymethylcellulose tablet?
1. KCl after 5 minutes dissolves easily in solvent
2. Carboxymethylcellulose swells up and turns into a gel after 35 minutes
What is the solution viscosity like in a polymer?
1. Low molecular weight compound is free flowing
2. Polymer is more viscous even though the concentration might be the same
What are the mechanical properties of polymers?
1. Can usually be stretched and then it can return back to it's normal form
2. Reversible deformations
Define what a monomer is?
The single molecules that make up a polymer
Define what a polymer is?
Made up of many repeating unit monomers
Define what a oligomer is?
When a molecule has many small molecules but it's not a polymer yet
How do you form a polymer from a oligomer?
Continue adding many repeating units to the oligomer until it becomes a polymer which is seen to have the same melting point
In this molecule *-[CH2-CH-CH3]n-* define what each bit means?
1. * signify the end group of the molecule
2. CH2-CH-CH3 represents the repeating unit
3. n= degree of polymerisation
What are molecular weight?
Molecular weight (Polymer) = Molecular Weight (Repeating unit) x Degree of Polymerisation
Define what configuration (molecular architecture)?
1. The order that is determined by chemical bonds
2. The configuration of polymer cannot be altered unless chemical bonds are broken and reformed
Define what a homopolymer is?
The only one type of monomer is used to build a macromolecular product
Give examples of natural polymers?