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Answer 1

Answer:

$<marquee behavior="scroll" direction="down"><font color =purple><bgcolor =pink>There are two main types of plastics and these are named Thermoplastics and Thermosetting Plastics. Thermoplastics are made up of lines of molecules with few cross linkages. This allows them to soften when heated and to be bent into a variety of shapes and forms.</p><p></p><p></p><p>Acrylic</p><p>Excellent optical clarity.</p><p>Excellent weatherability and resistance to sunlight.</p><p>Rigid, with good impact strength.</p><p>Excellent dimensional stability and low mould shrinkage.</p><p>Stretch forming increases bi-axial toughness.</p><p></p><p></p><p></p><p>Disadvantages of Plastics are.</p><p>Flammable – This is definitely an advantage in that they can be melted down, however smoldering plastics can release toxic fumes into the environment.</p><p>Cost of Recycling – While recycling is a plus, recycling is a very costly endeavor.$