All categories

2 years ago

State two types of plastics and their uses.

Chemistry

2 answers:

Svetllana [295]2 years ago

7 0

Thermoplastic and thermosetting

thermoplastic:- they are easily molded and extruded into films, fibres and packaging.For eg. PVC

thermosetting:-they are hard and durable and can be used for aircraft parts,tires and auto parts .For eg. phenolic resins.

HOPE THIS HELPS YOU ✌️

Maru [420]2 years ago

5 0

Answer:

The two types of plastic are:

1. thermosets (cannot be melted)

2. thermoplastics (can be melted)

Explanation:

Thermoplastics

Thermoplastics such as polyethylene and polystyrene are capable of being molded and remolded repeatedly.

Thermoplastics can be recycled. They are further of two types:

1. Amorphous (polystyrene, polycarbonate etc.)

2. Semi-Crystalline (PET, nylon etc.)

Thermosets

Thermoset is a material that strengthens when heated, but cannot be remolded or heated after the initial forming.

Thermosets can't be recycled.

You might be interested in

I had graduated cylinder with 50 mL of water. I added a rock to the graduated cylinder and the water level rose to 56 mL. What i

jeka57 [31]

Take 56 mL and subtract the original volume of 50 mL and that will give you the volume of the rock, which is 6mL.

8 0

3 years ago

What is the name of the groups that contain Iron(Fe) and Gold(Au)?

Molodets [167]

Answer:

Transition Metals

Explanation:

7 0

3 years ago

Read 2 more answers

Certain minerals exclude lead but not uranium from their crystal structure, so when the minerals form they have no lead, only ur

likoan [24]

Answer:

The answer is " $1.4 \ \bold{ billion-years}$ ".

Explanation:

Using formula:

$\to N_{Now} = N_{orige}e^{\lambda t} \\\\$

$\to$ 1 U atom produces 1 Pb atom after decay.

$\to$ U's original numbers are now the sum of U counts and Pb counts.

$\to N_U=(N_U+N_{pb})e^{\lambda Ut}$

$\to 1 = (1+3) \ exp[(\frac{-\ln(2)}{t_{(half)}} \times t ]\\\\\to t = [\frac{\ln(4)}{\ln(2)}] \times t_{(half)}$

$= 14 \times 10^8 \ \ years\\\\=1.4 \ billion \ \ years$

7 0

3 years ago

What gas do all fuels need in order to burn?

tresset_1 [31]

Hi there!

All gasses and engines need fuel to burn because the heat or chemical reaction from the burning fuels are converted into different types of energy that fuel (or help fuel) the engine or gas.

Hope this helps!

5 0

3 years ago

Read 2 more answers

Which of the following provides evidence to support Bohr's theory of atomic orbitals?

NeX [460]

Answer:

C. Spectrum of colors emitted by gas

Explanation:

Neils Bohr model of atom suggested that orbital electrons are divided into spherical orbits or energy levels around the central nucleus. In essence, electrons are located at various energy levels round the nucleus. His concept explained the discrete lines in the atomic spectrum of hydrogen. He suggested that electrons can move between different energy levels by simply gaining or losing energy.

5 0

3 years ago

Read 2 more answers

State two types of plastics and their uses.​

State two types of plastics and their uses.