Plastic explosive

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…

one of the reasons why it has become popular. Insulation is necessary to protect the roof from weather getting into the cracks of the wood shingles on the roof. If left alone for a long time, this can cause some damage on the roof. Installing foam plastic on these cracks will protect the roof from further effects of weather. It is in liquid form, which expands several times its initial size when sprayed on a surface. The spray foam is polyurethane foam or SPF that is used to insulate almost…

Egg Drop Project For my egg drop project, at first I planned to do a triangle shape around the egg with straws and tape the straws together. Then I changed my project to a square like shaped with enough flexibility to squeeze the egg into it. I used straws because it would “soften” the fall. I also used a parachute to make it a smoother fall. After I completely figured out what I was doing I started building. I hot glued two straws against one straw until I had a square. After I…

Roofing Options To Consider For Your New Home If you're building a new home, then you'll get to pick out the type of roof it will have. Maybe you haven't even thought about the roof, but the type you choose will affect the appearance of your home. Plus each type has its own advantages and disadvantages. Here's a look at some of the common roofing types you can choose from. Asphalt Shingles Asphalt shingle roofs are very common. They go with all types of homes, and since most homes have them,…

Colorado, a land of exploration, attraction and individuality. A place where you can both walk the active city and experience the beauty of the Rocky Mountains. Somewhere you can drive through the fascinating architecture of Metro Denver. Somewhere you can sit and observe the glistening bodies of water, the rushing rivers and still lakes. Somewhere you can wander up trails to discover the top of peaks to find yourself with unbelievable views. Somewhere you will experience and never forget…

How this fact neoprene? The wetsuit is made by a set of fabrics neoprene (it is a type of synthetic rubber with micro bubbles) that sewed or sealed to each other whose task is to try to prevent the passage of water or heat loss when one is wearing. Today the technology advanced a lot and we almost waterproof neoprene. Who invented the wetsuit? But this was not always so. The first sketches that were found on something like a neoprene date from the time of Leonardo da Vinci. Much later, Hugh…

up the polycarbonate plastic bottle and initiates the release of Bisphenol A, or BPA. Although it is not emitted in large quantities, the progressive consumption of BPA can have negative effects on the brain, behavior, and prostate glands in fetuses, infants, and young children. Bisphenol A is a chemical found in polycarbonate plastics. Data collected nationally display that BPA is already present in more than 90% of Americans. Mostly everyone around the world uses plastic water bottles, and…

Bisphenol A is widely used in plastics to form different types of materials for daily use in society. However these plastics such as containers, may expose people to small amounts of BPA in food and water. The exposure of BPA comes primarily from consumption of food, as there was a national survey given out by the CDC(Centers for Disease Control and Prevention) as there was BPA found in urine more than 90% of the people being studied. In one of the research articles, a team of scientist…

Plastic is a convenient, strong and universally important product utilized throughout the world. However, despite plastic’s convenience and prevalence, which consumers appreciate, it is a devastating reality that the convenience of use of plastic in so many household goods comes at a very high price for our earth and the beings that live on it. With increasing amounts of plastic polluting the oceans and dangerous chemicals being emitted from plastic products, plastic is a hazard to many animals…

In this modern world, plastic be the most used material for packaging in almost every industry. The word ‘plastic’ comes from the Greek plastikos which means easily shaped (Robertson, 2013). Plastic is the combination of many molecules that linked together as one long chain which made from polymers: poly (Greek) means many and meros (Greek) means part (Robertson, 2013). Raw materials of plastic are called feedstock which come from natural and synthetic resources, such as crude oil, natural gas,…