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PVC is kind of brittle to start with, though it becomes more brittle with age if exposed to sunlight, because UV rays break some of the bonds in the molecules.
"Vinyl" (flexible PVC) is flexible because it has additional compounds called "plasticizers" added to it. Over time, these can leach out, again leading to a more rigid and brittle material.
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What effect does plastic utenstills pollution have on humans?
AnswerIn this era of many astonishing industrial developments, probably no industry has under gone such rapid growth and development as the plastics industry. According to most authorities in this field, the plastics industry really began in 1868. A young American printer, named John Wesley Hyatt, was searching for a new material to be used as a substitute for ivory in the making of billiard balls. This new plastic was called Bakelite. Many new plastics have been made since Bakelite. Production of plastics has increased over 2000% since Bakelite was first produced, and there are now more than twenty known types. Research along the lines of plastics has given a great impetus to research and invention in many other different fields of endeavor. Millions of dollars are spent yearly in plastics research, trying to find new plastics and to improve the existing ones. Much research will be done in the future to lower the cost of producing plastics so that their consumption will become greater. In spite of the varied and widespread application of plastics in practically every phase of everyday life, the possibilities of this wonderful new material have been by no means exhausted. It seems safe to say that if the application and use of plastics continue to increase at the present rate, we may be living in a "Plastics Age."An apt definition of plastics has been given by the head of the Monsanto Plastics Research who says, "Plastics are materials that, while being processed, can be pushed into almost any desired shape and then retain that shape."The major chemicals used to make plastic resins pose serious risks to public health and safety. Many of the chemicals used in large volumes to produce plastics are highly toxic.Some chemicals, like benzene and vinyl chloride, are known to cause cancer in humans; many tend to be gases and liquid hydrocarbons, which readily vaporize and pollute the air. Many are flammable and explosive. Even the plastic resins themselves are flammable and have contributed to numerous chemical accidents. The production of plastic emits substantial amounts of toxic chemicals(eg. ethylene oxide, benzene and xylenes) to air and water. Many of the toxic chemicals released in plastic production can cause cancer and birth defects and damage the nervous system, blood, kidneys and immune systems. These chemicals can also cause serious damage to ecosystems.Ethylene oxide is used as a sterilant in hospitals. It is also the principle metabolite of ethene, a precursor to polyethylene plastics and other synthetic chemicals. Ethylene oxide can be measured by gas chromatography in air or biological specimens. Ethylene oxide reacts in the body with hemoglobin.Many food containers for meats, fish, cheeses, yogurt, foam and clear clamshell containers, foam and rigid plates, clear bakery containers, packaging "peanuts," foam packaging, audio cassette housings, CD cases, disposable cutlery, and more are made of polystyrene. J. R. Withey in Environmental Health Perspectives 1976 Investigated styrene and vinyl chloride monomer as being similar: "Styrene monomer readily migrates from food contained in it. It makes no difference whether the food or drink is hot or cold, or contains fat or water. ...It is not inconceivable that the animal body behaves as a 'sink' for styrene monomer until the lipid portion of the animal body either becomes saturated (although death would probably occur prior to this event) or the tissues are equilibrated at the same concentration as the exposure atmosphere."PVC is used for many products including: flooring, toys, teethers, clothing, raincoats, shoes, building products like windows, siding and roofing, hospital blood bags, IV bags and other medical devices. One of it's major ingredients is chlorine. When chlorine-based chemicals are heated in the presence of hydrocarbons they create dioxin, a known carcinogen and endocrine disruptor. All PVC production releases dioxin. Other sources of dioxin are: production and use of chemicals, such as herbicides and wood preservatives, oil refining, burning coal and oil for energy, all car and truck exhaust, cigarettePlasticizers are used in PVC that migrate into a blood recipient via the blood bag, IV bag, IV tubing. Children's toys are made with pvc.Anyone who receives blood, is on kidney dialysis, or has tubes either inserted in them or has liquid or air transported to their body is at risk. About 85% of medical waste is incinerated, accounting for ten percent of all incineration in the U.S.Approximately five to fifteen percent of medical waste needs to be incinerated to prevent infectious disease. The remaining waste, while not posing any danger from infectious pathogens, is very dangerous when burned. It contains high volumes of chlorinated plastics including PVC (also the toxic substances mercury, arsenic, cadmium and lead.
How does wasting sperm effects you?
If you are at the age of 16 to 23 it doesn't show any effects but after the age of 30 you become lazy and you backbone starting to pain . Your legs become weaker and if you are healthy you can't even walk .... I personally recommended you that only do when you are going to sex with someone e.g. with your girlfriend or your wife ....
When the glaciers that covered large parts of Earth melted after the last ice age did the the sea levels become higher?
Yes
What would happen to the oceans if surface runoff and groundwater flow were reduced for example by the growth of ice sheets during an ice age?
The ocean would become smaller.
The age of a rock compared with the age of other rocks?
What you are referring to is the relative age.
In an old age bones become what?
Brittle?
Does PVC water pipe get brittle with age. Inside a building so no exposure to the sun.?
It will eventually get brittle However, it takes much longer. in most cases it will out last the house.
In old age bones may become what?
brittle
Do Crayola colored pencils become more brittle as they age?
No
What is the simple subject the photographs had become brittle with age?
subject: photographs
What is the common cause of mechanical seal leak?
The rubber or plastic seals become brittle with age and crack, or simply wear out.
What happens to your skeletal system as you age?
Your bones become more brittle (more porous and easier to break), they obviously stop growing, the rate of regeneration is slowed.
What causes a leak from rubber hose that connects to the engine from the top left side of radiator?
Hose has become brittle from age Hose clamp has cut into hose
What has the author WJ McGill written?
W.J McGill has written: 'Plastics age' -- subject(s): Rubber, Plastics
How does age affect our bones?
As we age, our bones tend to become less dense, making them more susceptible to fractures and breaks. This can lead to conditions like osteoporosis, where bones become brittle and fragile. It's important to maintain a healthy lifestyle with adequate nutrition and weight-bearing exercise to help slow down the natural aging process of bones.
What is osteoporosis and who is most affected?
Older women are the most at risk due to a loss of certain hormones as they age. The condition is one where the bones become less dense making them brittle and easy to fracture.
What happens to fingernal growth as a person ages?
Fingernail growth typically slows down with age. Factors like hormonal changes, decreased circulation, and decreased cell turnover can contribute to slower nail growth in older individuals. Additionally, nails may become more brittle and prone to breaking as we age.
