Disadvantages of polymers are:
- non bio-degradable
- easily breakable
- flame retardancy is low
- when polymers incorporated with additives are burnt they emit a lot of poisonous gases into the atmosphere
- low molecular weight polymers (Polyethylene bags) are difficult to recycle
- improper disposal leads to environmental pollution
- undergo oxidation and ozonation easily
In the production stage, polymers are susceptible to contamination. Any varieties in heat and timing in the molding process , the final product will corrupt
They can produce toxic gasses when exposed to fire
They can produce toxic gasses when exposed to fire
The same as the drawbacks of anything specialized: you can only use them for a limited range of applications, and the company that makes them charges a large sum of money for them.
Because of this, most people will design their product so it can use a modified form of a standard polymer. Say you are designing a nylon gear, but it has to weigh more than a part made from pure nylon. If you add a little powdered steel to the nylon, you can increase the weight and still use the standard nylon resin.
polymers are very cheep to manurfacture and also can be constructed relitivily quickly, further more they are thermo setting and thus do not melt.
Cost! more expensive to produce
In general organic contains carbon molecules and/or those related to life. It is the chemistry of carbon containing compounds.Inorganic is everything else and generally do not contain carbon (with some exceptions).
Elements do not contain polymers. It is the other way around. Organic polymers contain elements. These are usually C, O, H, N, Halogens and some others.
Polymers are used all around, plastics and rubber are polymers.
they are called polymers
Nucleic acids
Plastics, which are polymers plus some additives, are their main use.
well all you have to do is ask simons mom :)
Molecules
Plants do make and use some polymers (e.g. starch, cellulose etc.), as do some animals (e.g. spider silk) but most of what we know as polymers are artificial (e.g. polyethylene, nylon etc.).
There are several polymers in living beings, for example, proteins, DNA, RNA, and polysaccharides.
In general organic contains carbon molecules and/or those related to life. It is the chemistry of carbon containing compounds.Inorganic is everything else and generally do not contain carbon (with some exceptions).
Macromolecules are polymers. There are bio-polymers such as carbohydrates, proteins, lipids and DNA, and there are synthetic polymers such as plastics (polystyrene and polyvinylchloride) and synthetic fibres. Nylon and terylene are also considered macromolecules.
Elements do not contain polymers. It is the other way around. Organic polymers contain elements. These are usually C, O, H, N, Halogens and some others.
semi-synthetic polymers are obtained from natural polymers by subjecting them to some chemical processes. eg: vulcanised rubber.
Protein.
There are some polymers which are stretchy while the others are not because of the disordered structure. Elasticity refers to the ability of a polymer to stretch past its original length.
Some advantages are based on its durability. Polymers can be shaped and formed into very simple shapes, as well as intricate more elaborate shapes.