plastics are synthetic polymers constructed from lengthy chains of carbon and other elements in our atmosphere. Through industrial processing techniques, oil and gas are converted into hydrocarbon monomers, then combined with certain chemicals to achieve the desired strength...
Polyhydroxyalkanoate (PHA) plastic uses starch also, typically from corn or sugarcane or beetroot, and it shows up in things like cosmetics bottles. Cellulose-based plastics are made of cellulose, the main component in plant tissues. You'll also find bioplastics made from soy protein or lactic...
Now scientists are trying to make "green" materials to take the place of plastics. In our daily lives, we should use fewer plastics. If everyone takes action, the world will be different.现在,科学家们正努力制造“绿色”材料来代替塑料。在我们的日常生活中,我们应该少用塑料。如果每个人都采取...
Plastics are made of synthetic materials like polyethylene and polypropylene. These materials are derived from petroleum, which is a fossil fuel. Plastics can be molded into different shapes and sizes, which makes them useful for a variety of applications. The production of plastics has increased dr...
But with the advent of modern materials, especially the creation of plastics, that all changed. Today, the most common materials used to make backpacks are nylon and polyester. Even backpacks from the same brand can be made of different materials!
Over 30,000 substances have been tested for use as a polymer plasticizer, though today, only about 50 are available for use. Of these, they are divided into four families: Phthalates,which are used for flexibility in plastics Dicarbonatesare used in shaping PVC at lower temperatures; ...
They've been banned everywhere because they are so bad for the environment and wildlife. Furthermore, beginning in 2021 the European Union will ban single-use plastics. ; we also need to change consumers' habits by changing the way they think about single-use plastics....
Waste no more: Polyols made from plants and exhaust CO? are already familiar in PU manufacture. But what about making polyols from recycled old plastics? Novoloop is taking waste PE, and transforming it into polyols to make TPU'Because we take PE waste and go straight to the diacids in ...
A new investigation by National Public Radio (NPR) and the Public Broadcasting Service(PBS)reports that the large oil and gas companies that manufacture plastics have known for decades that recycling plastic was unlikely to ever happen on a broad scale because of the-high costs involved. "They ...
present in much smaller quantities (sometimes less than 1 percent of the total). Although an alloy can sometimes be a compound (the elements it's made from are chemically bonded together), it's usually a solid solution (atoms of the elements are simply intermixed, like salt mixed with ...