DT p73-76 THERMOPOLYMERS

These flashcards cover key concepts from the lecture on materials and components, including types of polymers, properties, and innovative materials.

What is the main difference between thermoplastics and thermosetting polymers?

Thermoplastics can be remelted and reused, while thermosetting polymers remain solid once hardened.

What are the properties of urea formaldehyde (UF)?

Hard, heat resistant, good electrical insulator, and brittle.

What are some uses of polyester resin?

Castings, glass reinforced plastic (GRP) applications, car parts, chair seats.

What is graphene known for?

It is the world's thinnest and strongest material, consisting of carbon arranged in a hexagonal lattice.

Describe bioplastics. What are they made from?

Bioplastics are made from plant-based sources, such as vegetable oil or corn starch.

What type of materials are super alloys commonly used in?

Super alloys are used in extreme applications, such as turbine blades and components in jet/rocket engines.

What does the term 'smart material' refer to?

Materials whose physical properties change in response to changes in their environment.

What is the safe working temperature of high-density polyethylene (HDPE)?

65°C.

What kind of reaction do smart materials like thermochromic pigments have?

They react to environmental changes, such as temperature shifts.

Give an example of a use for nanomaterials.

Used in smart security tags, biomedical products, and aerospace applications.