Chap._100010 - coatings; later, similar synthetic...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
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
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

This note was uploaded on 10/16/2010 for the course MATSE 441 taught by Professor Chung,tze-chiang during the Fall '10 term at Pennsylvania State University, University Park.

Ask a homework question - tutors are online