As DVB has two double bonds, the more DVB contents easily make graft polymerization and chemical crosslinking.
ITA was filled into EPDM resin as physical crosslinker to construct a kind of three-dimensional network with high crosslink degree and low crosslink density; it also reacted with other monomers as a chemical crosslinking for the double bond in ITA chain.
This improvement is most clearly observed at high temperatures, because at room temperature there is a physical network present produced by the presence of crystallites as well as the covalent network produced by chemical crosslinking
5% MAH-g-PP rather than PP was used as the processing agent of PC due to the enhancement of the miscibility of the PC and MAH-g-PP components and the chemical crosslinking reactions between these two components at the interfaces (17-19).
SEM and FTIR results strongly suggested that chemical crosslinking reactions could have taken place between the PC and 2.
The dark coloration and brittleness in the films cured 300 [degrees] C in air and at 400 [degrees] C in nitrogen suggest that chemical crosslinking
is taking place.
Composite fillers were also prepared by chemical crosslinking
Key statement: The present invention refers to developing and obtaining new composite materials based on rubbers and/or elastomers and/or their recycled can be reused through an in situ polymerization program between the combination of different monomers and/or oligomers type diisocyanate, esters or organic peroxides crosslinking agent, which in their combination generates a binding agent capable of modifying the intrinsic chemical, thermal, rheological and mechanical properties in the material, and the chains chemical crosslinking
originated by the incorporation of organic peroxides which are able to accelerate or decrease the reaction rate.
The desired permanent shape is achieved via chemical crosslinking
When VTMS was added to the PVB, a new torque peak was observed due to the viscosity increase of the mixture, likely caused by the dynamic crosslinking reactions , Dynamic crosslinking is a chemical crosslinking
reaction that occurs in the internal mixer while polymer is under shear.
by gluteraldehyde immersion produced a more compressed fibrous network which appeared swollen or melted.
Compared with chemical crosslinking
, the advantage to radiation crosslinking after forming the product is that mold and barrel temperatures can be run at the standard thermoplastic temperatures and the same cycle time can be expected.