Module 5 - Structures, Properties and Uses of Matter Flashcards
is a large molecule made up of repeating smaller units
Polymer
are the foundation of biological and synthetic materials
Monomers
Polymer is made up from
monomers
Types of Polymers
- Biomaterials
2.Composites - Silicones
are natural or synthetic materials that make up whole or part of a living structure or biomedical devices that perform, augment, or replace natural functions of a living system.
Biomaterials
Biomaterials are used in many blood-containing devices like
artificial heart valves, synthetic vascular grafts, drug-release system, orthopaedic implants, a wide range of invasive treatments and diagnostic system.
The most common classes of biomaterials are
polymers,
metals
ceramics
made by combining two materials- fibers or fragments
Composites
What are the materials that builds a Composite
Reinforcement
Matrix
The continuous phase that holds the material together.
Matrix
The dispersed phase that strengthens the composite cement
Reinforcement
are heat-stables they are resistant to most chemicals and have excellent waterproofing characteristics.
Silicones
Four classes of silicones:
- Silicone fluids
- Silicones gels
- Silicone elastomers (rubbers)
- Silicone resins
They have unique surface properties because they have low surface tension making them useful as lubricant in polishes and paints, and for water-proofing fabrics, paper and leather.
Silicone fluids
The ____ of silicone fluids makes them useful in suppressing the foaming of detergents in sewage disposal plants.
anti-foaming properties
Their properties of ______ , and smooth and silky feel make silicone fluid good component of personal care products like anti perspirant and skin lotion.
low enthalpy of vaporization
are used for protecting electronic equipment from damage from vibration and act as electrical insulator.
Silicones gels
Shock absorbers in high-performance trainers and running shoes are made from pads containing
Silicones gels
are resistant to chemical attack
Silicone elastomers
are used in automotive industry, electrical applications, food and personal hygiene
Silicone elastomers
enhance gloss and colour retention, and resistance to corrosion, moisture, weather and heat in high-performance coatings.
Silicone resins
improve weather ability, water repellency, physical strength and release properties.
Silicone resins
