-
As we
know, the surface chemical composition and structure of glued materials bonding
properties, durability, thermal aging properties have a significant impact; and
the surface structure on the adhesive properties are often affected by changing
the surface layer of the cohesive strength, thickness, porosity, activity and
surface free energy and realization.To obtain
good bonding strength, the necessary condition is adhesive completely glued
material surface. Usually, in order to enhance the adhesion strength, a lot of
practice is on the bonding surface chemical treatment. However, surface
chemical structure not only has good stability and cohesion strength, but also
considers it on the adhesive was not occur degradation. For example, phenolic
adhesive for bonding of stainless steel and aluminum specimens were placed
under 288 degrees heat aging treatment 50 and 100min, aluminum specimen
stability is also quite good, and the stainless steel sample was almost lost
all strength. This is because, in the stainless steel surface may occur in
solid state redox reaction, resulting in high temperature aging performance
drops greatly.In order
to solve that can enhance the adhesion strength without lowering the strength
of bonding parts, some experiments on steel surface coated with a layer of 3,
4, 5 - trimethoxy cinnamic acid, bonding sample thermal aging performance can
be greatly improved. Therefore, change that can accelerate the polymer cracking
surface atomic properties, may be of steel bonded thermal oxidation is very
important. In addition, as we all know, PTFE is a surface can be very low inert
polymeric material; usually the adhesive can bond it. However, in 3, 4, 5 - trimethoxy
cinnamic acid treatment, PTFE broken bond, on the surface of the part of the
fluorine atom was pulled down (solution were found to have a fluorine atom) and
resulting in a surface of thin black brown carbon layer. At this time, not only
changed the surface chemical structure also increases the surface free energy,
thus improving the bonding performance.
mso-char-indent-count:2.0;line-height:15.0pt;mso-pagination:widow-orphan">3, 4, 5 - trimethoxy cinnamic
acid is mainly used to improve the surface of organic material and inorganic
material bonding properties, such as glass steel fiber glass and plastic,
rubber, paint, coatings of siliceous filler materials such as processing, is
also used to increase the adhesion properties of the adhesive, its adaptation
of a resin including epoxy, phenolic, melamine, polysulfide, polyurethane
polystyrene.3, 4, 5 - trimethoxy cinnamic
acid is mainly used to improve the surface of organic material and inorganic
material bonding properties, such as glass steel fiber glass and plastic,
rubber, paint, coatings of siliceous filler materials such as processing, is
also used to increase the adhesion properties of the adhesive, its adaptation
of a resin including epoxy, phenolic, melamine, polysulfide, polyurethane
polystyrene.mso-font-kerning:0pt" lang="EN-US">
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