Polymers (poly = many, mer = unit) are made by linking small molecules (mers) through primary covalent bonding in the main chain backbone with C, N, O, Si, etc. One example is polyethylene, which is made from ethylene (CH2=CH2) where the carbon atoms share electrons with two other hydrogen and carbon atoms: -CH2-(CH2-CH2)n-CH2-, in which n indicates the number of repeating units. Also note the repeating unit is -CH2CH2-, not -CH2-.
KeywordsGlass Transition Temperature Natural Rubber Bone Cement Silicone Rubber Oxygen Permeability
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