Polymers

Most polymer chains have crystalline and amorphous regions

true

Amorphous regions

molecules arranged randomly giving the polymer more flexibility and contains Van der Waals and H-bonding

Crystalline regions

Molecules in highly ordered position to make polymers more rigid and contains hydrogen and dipole-dipole bonding

Branched Polymers

Polymers with side chains off the main chain, causing them to be amorphous, soft, and low density, since branching prevents chains from packing closely

-IMFs: Van der waals

Cross-linked (network) polymer

A type of polymer where the individual chains are interconnected through branches or disulfide bridges in between.

IMFs: Hydroden bonds, Van der waals, and dipole-dipole

Linear polymers

polymers that consist of long, straight chains of monomers, allowing for more efficient packing and increased crystallinity.

IMFs: Van der waals and H bonds

How does branching affect the density of olefins?

As branching increases, density of olefins decrease, van der waals forces become weaker and the polymer becomes more amorphous due to the distance between molecules.

polyester

A category of polymers formed from the reaction between an alcohol and a carboxylic acid, characterized by ester linkages. Commonly used in textiles and plastics.

-Ex: Polyethylene Terephthalate (PET)

polyurrethane