| Glossary - C |
|
| Cataplasma test |
The storage of test specimens at 70°C and 100 % relative
humidity. |
|
| Chemical resitance |
::: will follow soon ::: |
|
| Clamping |
is the temporary securing of components in the desired position
by mechanical means while an adhesive is curing. |
|
| Cleaner |
is a chemnical agent used to clean surfaces prior to bonding
. |
|
| Co-efficient of expansion |
is the factor that expresses the dimensional changes in a component as
a function of temperature changes. Regarding wooden parts, the dimensional changes caused by changes of the humidity
also arean important factor. |
|
| Cohesion |
is the state in which the particles of an adhesive are held together
or the force prevailing between the molecules within an adhesive which keeps the material together. There are various
molecular forces responsible for the cohesion ( e.g. chemical forces, Van der Waals force etc. )
|
|
| Cohesive failure |
is a rupture of an adhesive bond, such that the separation appears to be within
the adhesive. |
|
| Creep |
is a dimensional change with time of a material under load. The creeping factor
is important for calculating structural elastic bonding. |
|
| Cross linking |
The creation of a three-dimensional network through the formation of chemical bonds
between molecular chains. |
|
| Cure accelerators |
are substances that reduce the curing time of of adhesives. An example is the
Sika Booster-System which is adding moisture so that the adhesives is curing faster and indepent from air humidity and
temperature. |
|
| Curing |
The setting or hardening of an adhesive as a result of physical or chemical
reaction |
|
| Curing conditions |
Conditions, which are important
for the curing of adhesives, e.g. humidity, temperature, time, joint design
|
|
| Curing time |
the period of time necessary for an adhesive or an assembly to cure by polymerization,
crosslinking, etc. under special conditions of temperature, humidity, pressure, etc.
A standard measuring is the time between the application of an adhesive and the first moment of possible use of the two
components bonded together. |
|
| Cyanoacrylate-adhesives |
are fast setting reactive adhesives, which
are curing on exposure to athmospheric moisture |
|
