Unformatted text preview: A thermoset can be cross-linked, branched, or linear. Cotton is an example of a linear thermoset. 4. (a) The resin used to make composites is liquid. (b) A chemical process converts the liquid to a solid. (c) The molecular architecture of the polyester in the final product is cross-linked. 5. (a) PET is the polymer commonly used to make fibers. The resin begins as a pellet. (b) A physical property melts and extrudes the pellets so it can be stretched into a fiber. (c) The molecular architecture is linear in the final product. 6. No, though not referring to the same material (i.e. one is thermoset and one is thermoplastic), they are both in the class of polyesters....
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- Fall '10
- Polymer chemistry, Polyester, Polyethylene terephthalate, Cross-link, Molecular Architecture