Plastics

The polyurethane segments show high intersegment attraction such as hydrogen bonding and may be able to crystallize and form hard segments. In such polymers hard segments with Tg well above normal ambient temperature are separated by polyol soft segments, which in the mass are rubbery in nature. Hard and soft segments are arranged alternate along the polymer chain. Fig.7. Polyurethane chain configuration [32] 4.2.2. Polyurethane properties and advantages for product development…

The usage of Additive Manufacturing is rising with an increasing rate. Instead of molding, casting, or machining products and its parts out of the piece of metal or plastic, larger than product, with Additive Manufacturing they are “printed”. Printing done by devices that build up very thin layers of metal or plastic, where layers, used to produce an object, could be smaller than the diameter of a human hair (Dupin 2015). Additive Manufacturing (AM) and 3D printing are the two terms, which are…

Submarine waste can range in many different aspects. Cardboard can be stored on board due to less weight; as for cans, they have to be added to the waste streams of the submarine. The combined compacted volume of food contaminated plastic and paper is less than 0.01 ft^3, which means this waste can be stored under the Annex V because of the eliminated storage. Submarines prefer to keep storage in food storage due to precautions to bypass contamination of unused supplies, which is needed for the…

8 million tons of plastic ended up in the ocean. Do you know the effect of plastic in the ocean and how it affects the environment? Plastic in our oceans has been ruining our environment and I don’t think this is ever going to get better unless we do something about it. The plastic in our ocean has been affecting our oceans for generations and just keeps getting worse. According to the Geology and Human Health website plastic has gotten into the ocean from ships (20% of plastic in the ocean),…

These plastics things in Kari O'Connor’s research (October 31, 2011) believed that “Different kinds of plastic can degrade at different times, but the average time for a plastic bottle to completely degrade is at least 450 years. It can even take some bottles 1000 years to biodegrade “ ,Each year ,according to Corrine Henn February 5, 2017 shows that we now consuming “ Upwards of 300 MILLION tons of plastic are consumed each year” ,also in her research…

Koutsomichalis et al (2008) discussed that having high hardness and good adhesion with the substrate the sprayed coating exhibited satisfactory wear resistance. Tungsten carbide is an advanced ceramic material combining a unique set of properties such as high hardness, high melting point, wear resistance, good thermal shock resistance, thermal conductivity and good resistance against oxidation. They can be applied as coatings by thermal spraying processes such as plasma-spraying, high-velocity…

remains inside a large plastic bag. The plastic bag was discovered in the old downtown district of Seattle, Washington on April 16, 2116. The remains were located in an old abandoned apartment building complex 30 feet underneath the ground in the old downtown district of the city. Several construction workers discovered the plastic bag while working on a renovation project for their construction company. The company hired a group of independent archaeologists to examine the plastic bag and all…

In Adam B. Summers’ editorial “Bag Ban Bad for Freedom and Environment”, he argues why California’s possible ban on plastic bags is detrimental and encourages readers to resist the ban. Summers uses several methods of persuasion in his essay to convince the reader of his argument. He begins and concludes the essay with words and phrases that appeal to the reader's emotions, as well as utilizing many facts and statistics to support his position. In the first several paragraphs, Summers appeals…

CHAPTER 1 EXECUTIVE SUMMARY TARPS recycles tarpaulin waste into bags. The bags are made out of tarpaulin, making it thicker than an average plastic bag and cannot tear apart easily like a paper bag would. Tarpaulin in nature are water resistant therefore the bags will not be affected by wet products and it will not melt when exposed in the rain unlike paper bags. If food was spilt in the bag it would be easier to clean it off or if the shoes put into it are muddy, cleaning the bag would not be…

“Treat the Earth well. It was not given to you by your parents. It was loaned to you by your children.” A quote by Kenyan Proverb that makes one think deeply about the future, of ours, and of our children. Many of our peers do not think deeply about this aspect, they only do if the facts are directly presented to them. Littering causes many negative affects on people, our community, and the economy. There are many possible solutions for this issue but, we decided to go for a simple, yet helpful…