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Polyurethane is considered very water resistant. The degree to which the polyurethane imparts waterproofing to to something it is applied to depends on the exact chemistry used to polymerize it, whether a blowing agent has been used to make it a foam (i.e. polyurethane foam), and the preparation of the surface before application.
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Why is polythene laid in a cement concrete pavement?
To form a waterproof barrier.
Why is polythene useful?
Polythene is useful because it is lightweight, strong, waterproof, and durable. It is commonly used for packaging, plastic bags, and containers due to its versatility and low cost. However, its non-biodegradable nature poses environmental challenges if not disposed of properly.
What is polythene rod made of?
The polymer "polythene".
What can Polythene Sheet be used for?
A polythene sheet can be used for many various purposes. Some of its uses include but are not limited to, acting as a waterproof agent and as a storage material.
Does polythene dissolve in water?
No, polythene does not dissolve in water as it is a non-polar polymer and water is a polar solvent. This lack of attraction between the polythene molecules and water molecules prevents it from dissolving.
How do you waterproof a mud hut?
To make a waterproof mud you need poles, grass, cow dung and polythene paper. The grass which is usually properly woven and the polythene paper are used to make the roof waterproof.
Why is polythene laid in a cement concrete pavement?
To form a waterproof barrier.
Why is polythene useful?
Polythene is useful because it is lightweight, strong, waterproof, and durable. It is commonly used for packaging, plastic bags, and containers due to its versatility and low cost. However, its non-biodegradable nature poses environmental challenges if not disposed of properly.
What is more flexible aluminium or polythene?
Polythene.
What is polythene rod made of?
The polymer "polythene".
Is polythene a chemical?
Polyethene (polythene, polyethylene) is a chemical product.
When was Polythene - album - created?
Polythene - album - was created in 1996.
Why does polythene have a negative charge with a cloth?
When polythene is rubbed with a cloth, electrons are transferred from the cloth to the polythene, causing the polythene to become negatively charged. This transfer of electrons creates an imbalance of charges between the two materials, resulting in the polythene having a negative charge.
What are the hazards of food served in polythene bags?
hazards of polythene bags
What is pe coated fabric?
It's fabric coated with a polythene film. The sort of thing from which waterproof tablecloths are made. Coatings vary, as does the fabric. PVC (poly vinyl chloride) is falling out of favour gradually, as it's not very environmentally friendly, but PE (polyethylene aka polythene) and PEVA (a copolymer of polyethylene and EVA (ethylene vinyl acetate) are readily available.
When polythene is rubbed with wool why does the polythene becomes negatively charged?
When polythene is rubbed with wool, electrons are transferred from the wool to the polythene due to differences in their electronegativities. The polythene gains extra electrons, making it negatively charged, while the wool becomes positively charged due to losing electrons.
Can polythene be used to make clothes?
Yes polythene can be used to make clothes
