WebButyl rubber is copolymerized from isobutylene [which is methylpropene H 2 C=C (CH 3) 2 ] and a small percentage of isoprene. Silicone rubber and other compounds, chemically … WebRubber is water repellent and resistant to alkalies and weak acids. Rubber's elasticity, toughness, impermeability, adhesiveness, and electrical resistance make it useful as an adhesive, a coating composition, a fiber, a molding compound, and an electrical insulator. In general, synthetic rubber has the following advantages over natural rubber ...
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WebCertain additives confer resistance to heat, sunlight, oxygen, and ozone. Amines, particularly paraphenylene diamines, are powerful retarders of oxidation, or antioxidants. Added to rubber compounds in small amounts (1–2 percent), they appear to disrupt the free-radical oxidation reactions that lead either to molecular rupture and softening or to increased … WebRubber is water repellent and resistant to alkalies and weak acids. Rubber's elasticity, toughness, impermeability, adhesiveness, and electrical resistance make it useful as an … Webvulcanization, chemical process by which the physical properties of natural or synthetic rubber are improved; finished rubber has higher tensile strength and resistance to swelling and abrasion, and is elastic over a greater range of temperatures. In its simplest form, vulcanization is brought about by heating rubber with sulfur. The process was discovered … how to make a simple balloon animal