The reason plastic is used in many products is because it can withstand up to tons of pressure per cm3, is cheap, is durable, and finally, there is no worry for discoloring. But these days, plastic is becoming a major problem the world has to deal with. Plastic is thrown into the ocean, and it is breaking down into very small pieces, and killing marine life, as they mistake those pieces to their prey. As a matter of fact, nearly all plastics are recyclable, but it 's the recycling companies ' machines that refuse to recycle that kind of plastic(eartheasy.com). I.
Therefore, plastics have a great contribution to the safety of water and food packaging, and subsequently to the consumers’ health. Water has become an essential issue in cities, and the storage and supply of clean water are often provided through plastics (Thompson et al. 2009). Moreover, plastic can be easily manufactured, and it is established in the various water distribution and control systems; for example, land drainage, storm water, irrigation and sewerage. This shows that plastic is a widely used building material of many useful items; nevertheless, plastic has some weaknesses.
It is a material that is designed to be strong, cheap, durable and easy to manufacture. However, where there is usage, there is disposal. Every moment on the earth, massive of plastic is produced and also the waste, people may think once they throw away their plastic products, they are disappeared forever, however, the truth is, “over 80 percent of ocean plastic leaks from land-based sources, even if people don’t live near the sea, chances are the plastic garbage has found its way o the sea” (A Plastic Ocean). Once the plastic has entered the ecosphere, they will be caught by the rainwater, picked up by the stream and river, and finally get into the ocean. People should be aware that, our ocean is heavily polluted by plastic from its surface to its bottom, just as Mike deGruy said in A Plastic Ocean after he finished his deep-sea exploration and saw a plenty of
Plastic bags and paper bags are used for various purposes such as for shopping, packaging, disposal, carrying and transporting of products from one place to another etc. Millions of people all over the world uses plastic bag as compared to paper bag because they are densely used everywhere (Cave, 2011). The manufacturing process of plastic bags consumes less energy but they have an adverse effect on the environment than paper bags. These plastic bags are generated from the natural resources like petroleum as well as through natural gas because both resources are easily available in a plenty of amount and are cheaper than paper bags. However, paper bags are manufactured by the tree named as “Pulpwood” and they consumes 4 times more energy than plastic bags.
Plastics are made from a raw material called naphtha which contains a mixture of hydrocarbons. This naphtha undergoes a process called cracking to form olefins or alkenes, namely propylene and ethylene, which are monomers that would ultimately bond to form polymers, that would later be transformed to plastics. Once these monomers are formed, they undergo chemical processes to bond together to form polymers, which contain long chains of the hydrocarbon. This is done by two methods namely polymerisation and polycondensation, the difference between the two being that first methods involves combination of monomers with the same functional group and the second involves combination of monomers that contain different functional groups which combine to form a polymer and also give out water as a byproduct. Once these polymers are formed, they are transformed into plastics by a number of methods.
Plastic Bags: The Enemy of the Environment Plastic is a commodity that people use everyday which makes daily life easier and safer. People take pills, use cell phones, and wear bike helmets in addition to a plethora of other activities, but tend to forget that one common element in all of them is the use of plastic. One of the main sources of plastic that has been polluting the environment over the last few decades are plastic bags. Plastic bags can be found in nearly every store to hold groceries, accessories, or toys. While plastic bags may provide convenience for customers, there is an overwhelming concern about the effect of them on the health and safety of people, marine life, and the surrounding environment.
Polymers Introduction: Polymers are substances that are composed of subunits. The recurring subunits in polymers are termed as monomers. These monomer subunits are mostly large hence making polymer a macromolecule. Due to their diverse applications polymers are considered to be used a lot in our everyday life for example in adhesives or in rubber. The importance of polymers in nature can be found by their role in biology as DNA which is a macromolecule with repeating subunits.
1.0 Introduction Plastics have proven to be essential to society. The versatile nature of plastics makes it one of the most sought-after material. According to The New York Times (2011), close to 300 million tons of plastic is being produced annually. Furthermore, an article by The World Counts (2014) suggests that only 1 to 3% of the plastic produced is recycled globally. Even more worrying is the fact that plastic is a non-biodegradable material which means that it is extremely difficult to dispose of, thus resulting in a surplus of unwanted plastic that has no means of proper disposal.
Typical uses of Plastic made Products and Major Industries in Which Plastic Fabrication Process is used? Polyethylene Terephthalate: 2-liter soda bottles, single-use water bottles, cooking oil bottles, peanut butter jars, etc. High Density Polyethylene: Detergent bottles, yoghurt tubs, milk jugs, bottle caps, backpack frames, hard hats, hula hoops, etc. Polyvinyl Chloride: Plastic pipes, Saran wraps, outdoor furniture, flooring, siding, etc. Polypropylene: Bottle caps, food containers, drinking straws, etc.
Plastic bags are bad for the environment. They are made from dangerous chemicals, pollute our oceans and land, and are costly to clean up. Banning or taxing them could lead to a long term solution to the plastic waste problem. Most plastic bags are made from polycyclic aromatic hydrocarbons, polypropylene, and polychlorinated biphenyl, which are known hormone disrupting chemicals. They take many years to break down, end up polluting our world, and harming life forms.