Study Set Content:
– ability of moisture vapor or gas to enter the plastic
Permeability
movement of container components into the contents
Leaching
binding of molecules to polymer materials
Sorption
Types of Plastics
• Polyethylene
• Polypropylene
• Polyvinyl chloride
• Polystyrene
• Polycarbonate
• Polyethylene terephthalate (PET
• Widely used
Polyethylene
• Very popular
Polypropylene
• Good water barrier
Polyethylene
• Excellent barrier to water, gases
Polypropylene
• Not too clear
Polypropylene
• Poor oxygen barrier
Polyethylene
• Not too clear
Polyethylene, Polypropylene
• Can be autoclaved
Polypropylene
• Odors, flavors, gases permeate
Polyethylene
• Cannot be autoclaved
Polyethylene
• Clear, rigid
Polyvinyl Chloride
• Good oxygen barrier
Polyvinyl Chloride
• Rigid
Polystyrene
• Permeable to water
Polyvinyl Chloride
• Crystal clear
Polystyrene
• Used for solid dosage forms
Polystyrene
