From Wikibooks, open books for an open world
This page may need to be
reviewed for quality.
Jump to navigation
Jump to search
Name |
Equation |
Notes |
Subject
|
Attractive Force |
= = ![{\displaystyle k_{0}{\frac {e^{2}Z_{1}Z_{2}}{r^{2}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/60a5b654fb1bf6fb6437eba615c35b4a155853b1) |
|
Bonding Forces and Energies
|
Repulsive Force |
![{\displaystyle F_{R}{=}{\frac {-b^{n}}{r^{n+1}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/3196d69a3351fefef903b1b50b9ff4bbe5e2ec9e) |
|
Bonding Forces and Energies
|
Net Energy |
= = ![{\displaystyle {\frac {-A}{r}}+{\frac {B}{r^{n}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/954253d076f7d9a9cd80a87c15c09a73a0c11570) |
Where A= and B is found using an empirical plot |
Bonding Forces and Energies
|
% Ionic Character |
![{\displaystyle (1-e^{-(.25)(X_{A}-X_{B})^{2}})*100\%}](https://wikimedia.org/api/rest_v1/media/math/render/svg/0d8e0a3140cf684bf881129d1a051e0e2339f1bc) |
A ionic B Covalent X electronegativity |
Bonding
|
Density, Metal |
![{\displaystyle \rho {=}{\frac {nM}{V_{C}N_{A}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/fff6f171bd1aa47a5e9db45d9750bbdb32749d5c) |
|
Density of Metals and Ceramics
|
Density, Ceramic |
![{\displaystyle \rho {=}{\frac {n'(\sum A_{C}+\sum A_{A})}{V_{C}N_{A}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/c2514da12587d1446c6375956896d9a46458bf47) |
|
Density of Metals and Ceramics
|
Atomic Packing Factor |
APF= ![{\displaystyle N{\dot {\frac {{\frac {4}{3}}\pi R^{2}}{a^{3}}}}{=}{\frac {V_{s}}{V_{C}}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/3b6f6f9f22c09d3f1d412d3bb13e518deeed6e11) |
Ceramic Crystal Structures
|
Degree of Polymerization |
![{\displaystyle DP={MolarWeightofpolymer({\bar {M_{n}}}) \over Molarweightofsubstituent({\bar {m}})}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/c658ae54efd7e96e41d278bf8b53bd62efca6ac7) |
|
Polymer Structures
|
Molar Weight Polymer |
![{\displaystyle {\bar {M_{n}}}{=}\sum x_{i}M_{i}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/7ee3389c0e8ca44455cb25d3fc097e9a470e8636) |
|
Polymer Structures
|
Molar weight substituent |
![{\displaystyle {\bar {M_{w}}}{=}\sum w_{i}M_{i}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/f2fa45a7756ad1d8912879e2452caee157990a99) |
|
Polymer Structures
|
number repeat units/ cell |
![{\displaystyle n{=}{\rho V_{C}N_{A} \over A}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/a0deed9fce5c4ff2300f3ee433a5567a2d9d7b15) |
|
Crystallinity
|
% Crystallinity |
![{\displaystyle {\rho _{c}(\rho _{s}-\rho _{a}) \over \rho _{s}(\rho _{c}-\rho _{a})}\times 100\%}](https://wikimedia.org/api/rest_v1/media/math/render/svg/3618321e2532df36c5168972262c3b6ff6de5d05) |
|
Crystallinity
|
Number of Vacancies |
![{\displaystyle N_{v}{=}Nexp\left({-Qv \over kT}\right)}](https://wikimedia.org/api/rest_v1/media/math/render/svg/81236113939db9bdfa203a8ab84caa88b1e625ce) |
|
Defects
|
Error function |
![{\displaystyle {\frac {2}{\sqrt {\pi }}}\int _{0}^{x}e^{-t^{2}}\,dt}](https://wikimedia.org/api/rest_v1/media/math/render/svg/11e2cb57c1458a5e55fc65283a2667550b89c9f9) |
|
Diffusion
|
|
Term |
Definition |
Notes |
Subject
|
Bonding Energy |
Energy required to separate two atoms to and infinite separation |
Example |
Bonding
|
Polymer |
Having Many Mer |
|
Polymer Structures
|
Mer |
Base atom or structure that repeats |
|
Polymer Structures
|
Ceramic |
nonmetallic, w/ %IC |
|
Bonding
|
Covalent |
Shares electrons |
|
Bonding
|
Ionic |
Gives up/ gains electrons |
|
Bonding
|
Electronegativity |
How much electrons wanted |
|
Bonding
|
Crystal |
single ordered form |
|
Crystallinity
|
Linear Density |
|
|
Ceramic Crystal Structures
|
Planar Density |
|
|
Ceramic Crystal Structures
|
Number-average |
based off size of chain |
|
Polymer Structures
|
Weight-average |
based off weight of chain |
|
Polymer Structures
|
Thermoplastics |
Linear+branched w/ minimal cross linking, heat malliable |
|
Polymer Structures
|
Thermoset |
network w/ crosslinks, covalent bonds, decomposes under heat |
|
Polymer Structures
|
Copolymer |
Different repeat units |
|
Polymer Structures
|
Monopolymer |
Same repeat units |
|
Polymer Structures
|
Atomic Packing Factor |
Atoms/ unit cell |
|
Ceramic Crystal Structures
|
Unit Cell |
Smallest crystal pattern constituent |
|
Ceramic Crystal Structures
|
Cation |
Positive ion |
|
Bonding
|
Anion |
Negative ion |
|
Bonding
|
Coordination number |
Number of nearest neighbors |
|
Ceramic Crystal Structures
|
Stacking Sequence |
|
|
Ceramic Crystal Structures
|
Ceramic |
|
|
Bonding
|
Degree of Polymerization |
Average number of repeat units per chain |
|
Polymer Structures
|
crystalline material |
periodic array of atoms over large atomic distances |
|
Ceramic Crystal Structures
|
unit cells |
small, repeating entities of crystalline material |
Example |
Ceramic Crystal Structures
|
mer |
unit cell of a polymer |
|
Polymer Structures
|
Polymorphism |
when metal or nonmetal may have more than one crystal structure |
see: allotropy |
Ceramic Crystal Structures
|
Allotropy |
polymorphism for elemental solids specifically |
see: Polymorphism |
Ceramic Crystal Structures
|
Random copolymers |
No pattern |
AABABBABBBABAA |
Polymer Structures
|
Alternating copolymers |
Directly alternating units |
ABABABABA |
Polymer Structures
|
Block copolymers |
One block identical, block other |
AAAABBBBAAAA |
Polymer Structures
|
Graft copolymers |
Main homopolymer chain with grafted homopolymer side branches |
|
Polymer Structures
|
Homopolymer |
|
|
Polymer Structures
|
Linear Polymer |
repeat units joined end-to-end in one chain |
|
Polymer Structures
|
Branched Polymer |
Has side-branch chains connected to main chains |
|
Polymer Structures
|
Crosslinked Polymer |
Adjacent linear chains connected at various positions by covalent bonds |
|
Polymer Structures
|
Network Polymer |
3D network of multifunctional monomers |
|
Polymer Structures
|
Isotactic Polymer |
All substituents on same side of monomolecular backbone |
|
Polymer Structures
|
Syndiotactic Polymer |
alternating positions along chain (down/up) |
|
Polymer Structures
|
Atactic Polymer |
substituents placed randomly on chain |
|
Polymer Structures
|
Tacity |
|
|
Polymer Structures
|
Interdiff
|