Flashcards
Ceramics and Polymers
Cards in this deck (16)
- 1Frenkel defect
- 2Schottky defect
- 3vulcanizationa nonreversible chemical reaction involving sulfur or another suitable agent wherein crosslinks are formed between molecular chains in rubber materials (strength and elasticity are enhanced)
- 4addition polymerizationprocess by which monomer units are attached one at a time, in chainlike fashion, to form a linear polymer macromolecule
- 5copolymera polymer that consists of two or more dissimilar repeat units in combination along its molecular chains
- 6glass transition temperaturethe temperature at which, upon cooling, a noncrystalline ceramic or polymer transforms from a supercooled liquid to a rigid glass
- 7ways to increase the tensile strength of a polymer materials• pre-deformation by drawing
• high molecular weight
• high degree of crystallinity - 8linear polymera polymer produced from bifunctional monomers in which each polymer molecule consists of repeated units joined end to end in a single chain
- 9branched polymera polymer having a molecular structure of secondary chains that extend from the primary main chains
- 10crosslinked polymera polymer in which adjacent linear molecular chains are joined at various positions by covalent bonds
- 11network polymersa polymer produced from multifunctional monomers having three or more active covalent bonds, resulting in the formation of 3D molecules
- 12refractory materiala metal or ceramic that may be exposed to extremely high temperatures without deteriorating rapidly or without melting
- 13elastomera polymeric material that may experience large and reversible elastic deformations
- 14sinteringparticle coalescence of a powdered aggregate by diffusion that is accomplished by firing at an elevated temperature
- 15thermoplastic polmera semi-crystalline polymeric material that softens when heated and hardens upon cooling, while in the softened state, articles may be formed by molding or extrusion
- 16thermosetting polymera polymeric material that, once having been cured (or hardened) by a chemical reaction, will not soften or melt when subsequently heated
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- ENME207 Flashcards on Ceramics and Polymers, created by twihardhoster on 24/09/2013.
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