Plastics and Polymers
The category should be plastics and polymers. We have a category of metals under chemistry. Plastics and polymers are the fasting growing category of materials. A Styrofoam cup is a plastic or polymer for example.
Asked in Plastics and Polymers
What linkage does a synthetic polymer terylene have?
Why is not advisable to burn solid wastes especially those made of plastics?
The burning of plastics is known to produce carenogens (cancer causing dioxins). Some plastics, especially those used in older computers and some older electronics contain brominated flame retardants, of which the health side effects are unknown. Plastics are further manufactured from Oil (long chain polymers), hence when burnt, give off carbon dioxide. A known side effect of this (other than global warming) is the acidification of rain, which during the 1980's caused mass deforestaton in skandinavia.
Is plastic harder than rubber?
Yes! Depends which plastic and which rubber you are talking about. It really is quite alarming how people use terms like "Plastic" and "rubber" when there are HUGE numbers of massively different products falling under each category. You wouldn't say "Come round for dinner tonight, we're having 'food' followed by 'food' and then some 'food' for dessert" would you??
Why electrocaloric effect observed in ferroelectric polymers only?
Its not true that electrocaloric effect (ECE) is observed only in ferroelectric polymers. ECE can be found in any typical dielectric material. If polarization switches from one direction to the other upon application or withdrawl of electric filed, the temperature of the material changes. It happens both in organic as well as inorganic materials. It is found that the EC coefficent is high near ferroelectric phase transition temperature.
Asked in Clothing, Shoes, Plastics and Polymers
What are those plastic pieces at the ends of shoelaces called?
Asked in Chemistry, Plastics and Polymers
Why are the little styrofoam pieces called peanuts?
Asked in Cleaning, Plastics and Polymers
How do you remove melted plastic from material?
One time I used a sheet of paper and an iron. Lay the sheet of paper over it and take a hot iron and put over the paper. It will melt the plastic and it will stick to the paper. I am not sure about melted plastic, but I've removed dried wax from fabric by placing a brown paper bag (usually a lunch bag) on top of the wax (or plastic in your case) and running a medium heat iron over the bag. The wax came off, so maybe it will work for melted plastic.
Is plastic renewable or nonrenewable?
This is somewhat more complicated than it might seem. First as most plastics are produced from petroleum or natural gas, which are nonrenewable resources, the plastics are nonrenewable. Second thermoplastics can be melted and recycled, but this is not true of thermoset plastics. But being recyclable does not make thermoplastics renewable. Only bioplastics (from living things, e.g. vegetable oils) are renewable, because their source chemicals can be grown.
Is protein a condensation polymer?
Is margarine plastic?
Do you mean "is margarine plastic" or do you mean "is margarine a plastic"? If you mean "is margarine plastic?" then the answer is "yes", because one of the meanings of the term "plastic" is something that is easily deformed, shaped, or moulded. If, on the other hand, you mean "is margarine a plastic?" then the answer is "no, it's a derivative of vegetable oil used as a lower cost alternative to butter".
Where can you find the tool for fastening a plastic aglet to shoelaces?
Asked in Plastics and Polymers
Can you clear coat over epoxy?
You should always check for compatibility of the products you are using, but epoxy coating can and probably should be top-coated with a polyurethane product. Epoxies are not UV stable and will yellow over time exposed to sunlight. Additionally, epoxy is a hard material that scratches easily. A polyurethane top-coat is more difficult to scratch and is UV stable. It will also provide a very rich deep shine to your coating.