Physical Properties Flashcards
fundamental force between molecules and atoms
Electromagnetism
rank the types of bonds in order from strongest to weakest
what type of force?
elactrostatic INTERACTION
FORCE IS ELECTROMAGNETIC
- ionic
- covalent
- metallic
- hydrogen
- van der waals
CTE?
coefficient for thermal expansion
thermal expansion shrinkage can cause?
internal stress -> decreased mechanical properties
high CTE could lead to?
post-operative sensitivity in association with a high CTE
implication of thermal expansion of different layer of material?
can cause interfacial stress, leading to bonding failure
thermal diffusivity ?
thermal conductivity and rates of conducting heat
how easily heat will diffuse throughout the material
hot –> cold
compare metal thermal expansion to glass
metal has a greater coefficient of thermal expansion than glass/non metal
expansion and shrikage can cause stress and thus decreased mechanical properties
melting point
temperature of a crystalline material changes from a solid to a liquid
- FIRST ORDER
Tg?
Glass transition point
- termperature of a amorphous material becomes rubbery
*SECOND ORDER
T/F semi - crystalline materials show both first order and second order
which is lower? occur first?
True - first order – melting point
second order – glass transition point
glass is always lower
definition of viscosity
is a measure of the resistance of a fluid which is being deformed by either shear stress or tensile stress
surface properties related with bulk materials
- hardness
- color
- gloss
- roughness
- ware
what is determined by surface property of a material
1, adhesion
- bonding
- wettability
- surface roughness
most cell interactions to biomaterials are determined by the surface
