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Chap._100010 - coatings later similar synthetic substances...

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1.3 Concept of Polymers * polymer - a large molecule - macromolecule Polymer has molecular weight at least few thousands and up to millions regular organic molecules bezene (C 6 H 6 ) Mw: 78 g/mole hexane (C 6 H 14 ) Mw: 86 g/mole Good processibility + properties Plastics rubber fiber High Polymers Most Commercial Polymers Oligomers organics gases 6 5 4 3 2 10 10 10 10 10 10 Mechanical Strength Molecular Weight of Molecule resin is sometimes used to refer to any material whose molecules are polymers. Originally this term was restricted to natural secretions, usually from coniferous trees, used mainly in surface
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Unformatted text preview: coatings; later, similar synthetic substances were included. Now the term is generally used to indicate a precursor of a cross-linked polymeric material, e.g. epoxy resin and novolak resin. * polymer - a poly---mers - comprised of repeating structural units joined by covalent bonds x colvence bond polymer (M) polymerization reaction n monomers (M) x: degree of polymerization...
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